Denna artikel sammanfattar examensarbetet Krisberedskap för sanitetssystem: Utvärdering av behandlingslösningar för toalettavfall (Löfgren, 2025). Arbetet utreder lösningar för insamling och behandling av toalettavfall vid långvarigt elavbrott i svensk kontext, där det inte längre går att spola i toaletten. Med det definierade krisscenariot analyserades praktiska, hållbara och skalbara alternativ för 500 respektive 10 000 personer, med separat
insamling av urin och fekalier.
Publiceringsdatum
Författare
Kajsa Löfgren
Nyckelord (Keyword)
Emergency sanitation, toilet waste management, urea treatment, thermal composting, crisis preparedness, nutrient recycling
Nummer
4
Årgång
2025
Utgåva
I takt med urbaniseringen sker omfattande exploatering där stadsdelar byggs på tidigare åkermark. Markavvattningsföretag som finns kvar i exploaterad åkermark kopplas ofta samman med dagvattenanläggningar. Då markavvattningsföretag och dagvattensystemen dimensioneras enligt olika principer kan översvämningar uppstå där de möts, särskilt under vinterhalvåret. Till följd av klimatförändringarna kommer flödena i dagvattensystemen öka, vilket förstärker behovet att studera samspelet mellan dagvattensystem och markavattningsföretag.
Publiceringsdatum
Författare
Emma Sterner, Michelle Karlsson, Johanna Sörensen
Nyckelord (Keyword)
Agricultural drainage system, stormwater management, tile drainage, flooding, MIKE+, LID
Nummer
4
Årgång
2025
Utgåva
Denna studie beskriver beslutet, och utvärderingen inför beslutet att implementera pyrolysteknik för behandling av avloppsslam vid Margretelunds avloppsreningsverk i Åkersberga, Sverige. Analysen omfattar jämförelse av olika slambehandlingsmetoder med fokus på energieffektivitet, resursåtervinning, miljöpåverkan, ekonomiska
aspekter och marknadspotential där framtida krav på kvaliteten hos avloppsvattenprodukter som används på
åkermark samt på recirkulation av växtnäringsämnen utgör nyckelfaktorer.
Publiceringsdatum
Författare
Aleksandra Lazic
Nyckelord (Keyword)
Avloppsslambehandling, Cirkulär kretsloppslösning, Fosforåtervinning, Kolsänka, Pyrolysteknik, Resursåtervinning, Slambiokol, Teknikutvärdering, Circular wastewater management, Carbon sequestration, Phosphorus recovery, Pyrolysis technology, Resource recovery, Sludge-derived biochar, Sewage sludge treatment, Technology assessment
Nummer
4
Årgång
2025
Utgåva
Numeriska modeller är centrala för att förstå och förutse väderhändelser, men deras beräkningsintensitet begränsar möjligheterna till snabba prognoser och scenarioanalyser. Denna studie undersöker potentialen hos datadrivna surrogatmodeller, det vill säga maskininlärningsbaserade approximationer av numeriska simuleringar, för att minska beräkningstiden utan att kompromissa med träffsäkerheten.
Publiceringsdatum
Författare
Elsa Delshammar, Adina Hellström, Freja Petersen, Lars Jonasson
Nyckelord (Keyword)
Cloudbursts, Temporarily high sea levels, Data-driven surrogate modeling, Machine learning
Nummer
4
Årgång
2025
Utgåva
Släckvattenhantering innebär förberedelsen för och förmågan att hantera det släckvatten som uppstår i samband med brand. På senare år har hantering av släckvatten fått ökad betydelse i takt med skärpta miljökrav och medvetenhet om föroreningar, i synnerhet PFAS och liknande svårnedbrytbara ämnen med stora miljökonsekvenser. Främst industrier föreläggs med myndighetskrav på förebyggande åtgärder för hantering av kontaminerat släckvatten.
Publiceringsdatum
Författare
Eric Gard, Thomas de Korostenski
Nyckelord (Keyword)
Extinguishing water management, PFAS, fire safety, environmental protection
Nummer
3
Årgång
2025
Utgåva
Klimatförändringar och en växande befolkning bidrar till att översvämningar i samband med kraftiga skyfall blir allt vanligare. Fastighetsägare står inför utmaningen att identifiera och prioritera de fastigheter där skyfallsåtgärder ger störst nytta. Denna studie gjordes i samband med ett examensarbete och syftet var att ta fram en metod som kan hjälpa kommuner i deras arbete med att prioritera fastigheter för åtgärder kopplade till skyfall.
Publiceringsdatum
Författare
Vilma Sjöberg, Johanna Sörensen
Nyckelord (Keyword)
Pluvial flooding, Flood risk management, Municipal real estate company, Flood risk mapping
Nummer
3
Årgång
2025
Utgåva
Utmaningar i elsystemet, förändrade elprismodeller och behovet av att hushålla med energi kommer i allt högre grad att påverka och engagera VA-organisationer. Artikeln sammanfattar ett utvecklingsprojekt finansierat av Svenskt Vatten (Hagman et al., 2024) som undersökt hur VA-organisationer, med fokus på dricksvattendistribution, kan möta dessa förändringar.
Publiceringsdatum
Författare
David Lindblom, Daniel Iggström, Victor Pelin, Björn Possling, Johan Spännare, Marinette Hagman
Nyckelord (Keyword)
Digitalisation, energy efficiency, water distribution, energy transition
Nummer
3
Årgång
2025
Utgåva
Den här artikeln presenterar en undersökning av hur fyra kommunala VA-bolag i Mälardalsregionen arbetar med klimatanpassning av sina VA-anläggningar. Den övergripande frågan är vilka drivkrafter och utmaningar som aktörerna identifierar med fokus på möjligheter och hinder för klimatanpassningen. Resultaten visar att kommunerna och VA-bolagen tar klimatfaran på allvar men vi konstaterar att man inte hunnit särskilt långt.
Publiceringsdatum
Författare
Lena Johansson Westholm, Pär Blomkvist
Nyckelord (Keyword)
Adaptiv kapacitet, Ansvarsfördelning, Föroreningar, Hållbarhet, Klimatförändring, Samverkan, Sanitet, Skyfall, Vattentjänstplan, Adaptive capacity, Division of responsibilities, Pollutions, Sustainability, Climate change, Cooperation, Sanitation, Heavy rain, Water Service Plan
Nummer
3
Årgång
2025
Utgåva
Välkommen att läsa vår tredje språkspalt här i Tidskriften Vatten.
Tidskriftens läsare och andra intresserade är välkomna att bidra till ett framtida
terminologiprojekt via LinkedIn-gruppen ORDiVA.
Publiceringsdatum
Författare
Michael Cimbritz
Nummer
2
Årgång
81
Utgåva
Att anpassa sig till klimatförändringen och dess konsekvenser är en stor utmaning för samhällen världen över.
Detta gäller både anpassningen till nya normalförhållanden, men också till förändrade extremväder.
Publiceringsdatum
Författare
Joel Dahné, Olivia Larsson
Nyckelord (Keyword)
Hydrology, climate impact, scenario tool, climate indicator, emission scenario
Nummer
2
Årgång
81
Utgåva
For over 30 years, constructed wetlands (CW) have been proposed and used as multi-functional environmental
measures in Skåne, Southern Sweden. CW continue to be proposed and implemented as a cost-effective
measure to reduce eutrophication and improve biodiversity
Publiceringsdatum
Författare
Emese Witte
Nyckelord (Keyword)
Constructed wetlands, nutrient retention, biodiversity, stakeholder collaboration, developmental trajectory, policies
Nummer
2
Årgång
81
Utgåva
Inför utbyggnaden av Brantafors vattenverk i Ronneby kommun utfördes studier i en pilotanläggning, som försågs med en delström av råvattnet till befintligt vattenverk, för att hitta lämplig processkonfiguration för det blivande vattenverket och säkerställa att denna levererar godkänt dricksvatten. Studien pågick under sju månader 2021-2022.
Publiceringsdatum
Författare
Hans Carlsson
Nyckelord (Keyword)
Biological manganese removal, biological iron removal
Nummer
2
Årgång
81
Utgåva
Fram till år 2040 krävs uppåt 600 miljarder kronor för att säkra VA-infrastrukturen i Sverige. Att genomföra
dessa investeringar samtidigt som utsläppen av växthusgaser ska minska är en stor utmaning. Det gäller inte
minst för ledningsnätsprojekt som har betydande klimatpåverkan.
Publiceringsdatum
Författare
Theo Voulgaridis
Nyckelord (Keyword)
Water pipeline project, Climate guide, climate mitigation, window of opportunity
Nummer
2
Årgång
81
Utgåva
Rwanda’s capital Kigali has a reputation for being the cleanest city in Africa. Despite Kigali outperforming its neighboring capitals over the last decade with significant progress in waste collection coverage, Solid Waste Management (SWM) remains a key focus area for improvement.
Publiceringsdatum
Författare
Julia Ahlbin, Ida Lavik Olofsson
Nyckelord (Keyword)
Solid Waste Management; Waste-to-energy; Biogas production; Fixed Dome Digester
Nummer
1
Årgång
81
Utgåva
Denna studie presenterar en jämförande analys av skyfallsmodelleringsprogrammen MIKE+ och Fluidit Storm,
med fokus på deras hydrauliska resultat, ekvationer och numeriska lösningar.
Publiceringsdatum
Författare
Frida Wistfors
Nyckelord (Keyword)
Skyfallsmodellering, ytavrinning, dagvattenledningsnät, ekvationer och numeriska lösningar
Nummer
1
Årgång
80
Utgåva
Syftet med studien var att beskriva algfloran i Ammerån, ett biflöde till Indalsälven, och diskutera möjliga effekter av ett reducerat flöde. Anledningen var att vattenkraftsindustrin hade då (mitten av 1980-talet) föreslagit en överledning av vatten från de nedre delarna av Ammerån till Indalsälven för att öka uttaget av elenergi.
Publiceringsdatum
Författare
Catarina Johansson
Nyckelord (Keyword)
Attached algae, stream algae, biomass, reduced water discharge
Nummer
1
Årgång
81
Utgåva
Anläggningsentreprenaden för den cirka 80 kilometer långa råvattentunneln från Bolmen för att säkra dricksvattenförsörjningen i Skåne började i maj 1975. I denna artikel redovisas några förhållanden inför byggstarten tillsammans med hur den politiska och ekonomiska processen för att genomföra tunnelbygget hade utvecklats inför byggstarten.
Publiceringsdatum
Författare
Kenneth M Persson
Nyckelord (Keyword)
water supply, infrastructure, politics
Nummer
1
Årgång
81
Utgåva
På senare år har betydelsen av en fungerande vatteninfrastruktur för livsmedelsproduktion blivit tydlig. Extremväder med för lite och för mycket vatten har orsakat skördeskador för 10 till 15 miljarder kronor de senaste åren. Vattenrelaterade skördeskador blir därför en fråga för landets livsmedelsberedskap och för lantbrukets egen del är det på lång sikt ekonomiskt omöjligt med så stora skördeskador. För att motverka problemen behöver det bland annat täckdikas mer och det behöver anläggas fler bevattningsdammar.
Publiceringsdatum
Författare
Markus Hoffman
Nyckelord (Keyword)
livsmedelsproduktion, bevattning, klimatanpassning, täckdikning, dagvatten, översvämning
Nummer
4
Årgång
80
Utgåva
I samband med klimatförändringar och förändrade regnmönster blir utvecklingen av resilienta dagvattensystem avgörande för att säkerställa hållbara samhällen. I ett kandidatarbete våren 2024 undersöktes behovet, potentialen och nyttan av smarta fördröjningsmagasin för magasinering och återbruk av dagvatten i Sverige, med fokus på deras praktiska implementerbarhet.
Publiceringsdatum
Författare
Alice Enbom, Ida Rastin, Betty Mattsson, Jesper Knutsson
Nyckelord (Keyword)
Detention basins, stormwater management, rainwater harvesting, climate change, flood manage-ment, RTC, real-time control, sustainability.
Nummer
4
Årgång
80
Utgåva
I Sverige förlitar sig cirka 1 miljon människor på enskilda avloppsanläggningar för att rena avloppsvatten. Ofta sker detta i markbaserade system bestående av en slamavskiljare följt av infiltration i sandigt jordmaterial.
Publiceringsdatum
Författare
Jon Petter Gustafsson, Charlotta Tiberg, David Eveborn
Nyckelord (Keyword)
phosphorus; soil treatment systems; retention, phosphate adsorption; unsaturated zone; ground-water zone; XANES spectroscopy; CD-MUSIC model
Nummer
4
Årgång
80
Utgåva
The combination of climate change and urban consolidation will lead to increased risk of pluvial flooding in urban environments. Sustainable stormwater management can decrease these risks by using measures for surface runoff to be detained locally, preferably through nature-based solutions. Private properties constitute about 70% of the land in Swedish cities and there is a lack of clear legislation as well as other incentives to increase the implementation of sustainable stormwater practices on such properties.
Publiceringsdatum
Författare
Tove Wideqvist, Linn Ihrefjord, Johanna Sörensen
Nyckelord (Keyword)
Sustainable Urban Drainage Systems (SUDS), private land, property owners, policy instruments, climate change adaptation
Nummer
3
Årgång
80
Utgåva
Stormfloden 1872, i Sverige även känd som Backafloden, är den största kända stormfloden som drabbat södra Östersjön. Den representerar ett händelseförlopp där extrema vattenstånd uppstod på grund av en ovanlig kombination av vindförhållanden, vilket orsakade omfattande kustöversvämningar. Denna studie presenterar vågförhållandena under stormen 1872, simulerade med vågmodellen SWAN och baserat på rekonstruerade vinddata.
Publiceringsdatum
Författare
Emmy Sukchaiwan, Anna Adell, Caroline Hallin, Björn Almström
Nyckelord (Keyword)
Storm surge, Wave modelling, SWAN, Baltic Sea, Backafloden
Nummer
3
Årgång
80
Utgåva
För att ta höjd för klimatförändringens påverkan på extremregn används klimatfaktorer, för att skala upp historisk regnstatistik. SMHI:s klimatfaktorer är beroende av olika parametrar: varaktigheten (och återkomsttiden) på regnet, den framtida tidshorisonten och utsläppsscenariot. Inför en uppdatering av SMHI:s klimatfaktorer formulerades och distribuerades en enkät om vilka värden på dessa parametrar som praktiker finner vara mest relevanta. I denna artikel redovisas resultatet från denna enkät.
Publiceringsdatum
Författare
Jonas Olsson
Nyckelord (Keyword)
Climate change, extreme rainfall, design values
Nummer
3
Årgång
80
Utgåva
Privata regnmätare för professionell användning– Test av Netatmo regnsensor i Trelleborg och Svedala
Privata väderstationer med regnsensor kan potentiellt utnyttjas som ett komplement till regndata från det professionella nätet av regnmätare, vilket i Sverige består av SMHI:s mätare tillsammans med regnmätare som hanteras av de kommunala VA-organisationerna. En grundläggande förutsättning för att ett sådant komplement ska vara användbart är att regnmätarna är pålitliga och ger rimligt noggranna värden. I denna artikel redovisas flera mätexperiment där regnmätare av typ Netatmo jämförts med professionella regnmätare.
Publiceringsdatum
Författare
Tomas Wolf, Rolf Larsson
Nyckelord (Keyword)
Private weather station, precipitation measurement, comparison, evaluation
Nummer
3
Årgång
80
Utgåva
Klimatanpassning är en stor utmaning för samhällsbyggandet och det krävs ny kunskap om hur detta ska göras. I artikeln ges ett axplock av intressanta internationella forskningsresultat som rör klimatanpassning av dagvattensystem. Förändringar i nederbörd går redan att urskilja i observerade data, och dessutom kan de vara starkare i bebyggda områden. Osäkerhet i prognoser av framtida regn gör att erforderlig dimensionering av dagvattensystem kan vara oklar.
Publiceringsdatum
Författare
Ico Broekhuizen
Nyckelord (Keyword)
climate change, adaptation, stormwater, blue-green infrastructure, nature-based solutions, dimensioning, maintenance
Nummer
3
Årgång
80
Utgåva
Vid planering av VA-infrastruktur i tätorter är det ofta givet att ledningsdragning ska ske längs med eller under befintliga vägar. Men för planläggning av infrastruktur mellan städer är det inte lika givet var ledningssträckorna ska dras. Här måste istället hänsyn tas till bland annat förorenad mark, riksintressen och naturskyddade områden. Dessutom måste markförutsättningar som är avgörande […]
Publiceringsdatum
Författare
Frida Björkroth, Sonja Sandström, Britt-Inger Norlander
Nyckelord (Keyword)
GIS, öppna data, geodata, least-cost path, kartor, multikriterieanalys, AHP, open data, maps, multicriteria analysis
Nummer
2
Årgång
80
Utgåva
Med huvudet bland molnen" är en artikel skriven av William Bredberg som utforskar digitaliseringens roll inom svensk och norsk VA-bransch. Artikeln diskuterar hur VA-branschen i Sverige och Norge tar till sig ny teknik och innovation, samt belyser de gemensamma utmaningar som länderna står inför. Här tar författaren utgångspunkt i sitt arbete för Volue i Norge, […]
Publiceringsdatum
Författare
William Bredberg
Nyckelord (Keyword)
Digitalization, water management, data management, cloud-based data infrastructure
Nummer
2
Årgång
80
Utgåva
Jämförelse mellan riktvärden för utsläpp av dagvatten i olika kommuner visar stora variationer. Undersökningen gjordes genom en enkel internetsökning av 15 kommuner. Östersunds kommun har riktvärden för flest ämnen. Några kommuner har olika riktvärden för olika recipienter som till exempel Göteborgs Stad, Östersunds kommun eller Järfälla kommun. Riktvärdena varierar stort mellan kommunerna. Exempelvis varierar tillåtna […]
Publiceringsdatum
Författare
Peggy Piri
Nyckelord (Keyword)
Stormwater quality, Sweden, guideline values
Nummer
2
Årgång
80
Utgåva
Med stigande havsnivå och mer omfattande regn blir klimatanpassning allt viktigare för Sverige men möjlighetenflytta tillgångar ut ur högriskområden i situationer där traditionella lösningar inte längre är samhällsekonomisktförsvarbara förbises till stor del. Reträtt som klimatanpassningsstrategi till översvämningar handlar om att återskapaplats för vattnet när lösningen inte längre ligger i att stänga ute eller inne vattnet. […]
Publiceringsdatum
Författare
Gunnel Göransson, Lisa Van Well, David Bendz
Nyckelord (Keyword)
flexmark, flytt, klimatanpassning, omlokalisering, planerad reträtt, översvämning, climate adaptation, flexmark, flooding, relocation, planned retreat
Nummer
2
Årgång
80
Utgåva
Archived radar data has various applications, though it is often underutilised. Nevertheless, this information has the possibility to aid in the development of accurate and relevant climate adaptation tools, inform climate-resilient urban development strategies, and numerous other personal and societal applications. Our work in the RadClim Baltic Sea Region (BSR) project established the potential features, […]
Publiceringsdatum
Författare
Blaine Lowry, Hossein Hashemi, Andreas Hoy, Piia Post, Jan Szturc, Tanel Voormansik, Sylwia Gzik
Nyckelord (Keyword)
Radar-based Precipitation, Climatology, Baltic Sea Region
Nummer
1
Årgång
80
Utgåva
The hydrological cycle is impacted by ongoing climate changes, which in turn affect the local water supply infrastructure due to increasing demands. With the consequences of globalization, it’s crucial to ensure access to water of sufficient quality. Utilizing rainwater can ease the pressure on local water supply infrastructure, contributing to adaptation to these changes. Flooding […]
Publiceringsdatum
Författare
Sonny Colin, Michael Erneland
Nyckelord (Keyword)
3D-printing; Low-cost sensors; Water shortage; Water quality Index; Water quantity
Nummer
1
Årgång
80
Utgåva
Studier av biofilter fokuserar ofta på rening av föroreningar, men deras förmåga att fördröja kraftiga flöden studeras sällan. I den här studien presenteras en optimerad design av biofilter och svackdiken som beräknas ge både bra rening och flödesutjämning även vid kraftiga flöden. I en fallstudie beräknades erforderlig fördröjningsvolym i dessa och jämfördes med densamma för […]
Publiceringsdatum
Författare
Thomas Larm, Anna Wahlsten, Maria Nordgren, Johan Kjellin
Nyckelord (Keyword)
optimized design biofilter swale ditch flow detention treatment
Nummer
1
Årgång
80
Utgåva
I november 2023 fick jag tack vare Xylem-priset chansen att besöka två mycket intressanta vattenanläggningar i Los Angeles-området i Kalifornien i USA: en anläggning i Pico Rivera för återvinning av avloppsvatten, och en anläggning i Torrance för avsaltning av bräckt vatten. Båda dessa anläggningar drivs av the Water Replenishment District of Southern California, som är […]
Publiceringsdatum
Författare
Peter Asteberg
Nyckelord (Keyword)
Los Angeles, water scarcity, desalination, potable reuse, brackish water
Nummer
1
Årgång
80
Utgåva
A world with multimeter sea level rise is likely to be a world riddled with storm surge barriers. One cannot with certainty tell if or when our world will experience such magnitudes of sea level rise, but we can infer that certain geographical locations offer alternative options to local storm surge barriers. Here, the Baltic […]
Publiceringsdatum
Författare
Magnus Hieronymus
Nyckelord (Keyword)
Sea level rise, Seawalls, Dikes, Adaptation, Flooding
Nummer
4
Årgång
79
Utgåva
The first contribution of the book lies in the historical comparison of infrastructural systems that normally are dealt with separately. The synthesis has been achieved mainly by an extensive literature review of research from a wide range of various fields and by using prime sources to some extent. Earlier results have been reinterpreted and research […]
Publiceringsdatum
Författare
Pär Blomkvist
Nyckelord (Keyword)
policy and governance, utility/network management, water supply and treatment, infrastructure history, roads and streets
Nummer
4
Årgång
79
Utgåva
The effects of green areas on design flow (Qdim) and required flow detention volume (Vd) were studied for different transport times, rain durations and rain intensities. The StormTac Web model was used for the calculations on a 36 ha urban catchment with green areas. Simulated runoff coefficients from different rain intensities and rain durations were […]
Publiceringsdatum
Författare
Thomas Larm, Anna Wahlsten, Johan Kjellin, Sara Ekeroth, Jimmy Olsson, Ico Broekhuizen
Nyckelord (Keyword)
design flow detention volume runoff coefficients rain intensity
Nummer
4
Årgång
79
Utgåva
A historical review of the driving forces behind use of wastewater for irrigation for agriculture in Sweden is presented, starting with a detailed description of the work done at the wastewater treatment plant Käll-by in the city of Lund, south Sweden. Different initiatives have been taken to reduce water shortage in agriculture during the years. […]
Publiceringsdatum
Författare
Kenneth M Persson, Lena Flyborg
Nyckelord (Keyword)
Water reuse, Irrigation, Källlby WWTP, Nutrient utilization
Nummer
3
Årgång
79
Utgåva
Aqueuous Film Forming Foam (AFFF) containing Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) is one of the major sources of groundwater contamination in Sweden. Groundwater contamination caused by the use of AFFF in correlation to fire training events was investigated in Kallinge, Sweden. At the site groundwater was previously used as a drinking water source consequently affecting […]
Publiceringsdatum
Författare
Anna Söderman
Nyckelord (Keyword)
PFAS; Contamination; Firefighting Foam; Groundwater; Drinking Water.
Nummer
3
Årgång
79
Utgåva
Global warming is leading to more extreme short-duration rainfalls, which need to be considered when designing our society. This is commonly performed by using climate factors, representing the estimated future relative increase in short-duration extremes, to upscale design values based on historical observations. The most recent estimation of climate factors for Sweden was done some […]
Publiceringsdatum
Författare
Jonas Olsson, Miranda Gatti
Nyckelord (Keyword)
Climate change, extreme rainfall, design values
Nummer
3
Årgång
79
Utgåva
Green roofs are a popular way to include nature in an urban environment. How is runoff from green roofs in the cold and snow-covered part of the year, when growth media freeze, plants are dormant and covered with melting snow? This paper investigates 11 years of runoff from three green extensive roofs in Oslo, Norway. […]
Publiceringsdatum
Författare
Bent C. Braskerud, Kim H. Paus
Nyckelord (Keyword)
Cold climate; detention; runoff intensity; sedum; snowmelt intensity; stormwater
Nummer
3
Årgång
79
Utgåva
Large changes are planned and implemented to meet the negative effects of the global warming forecasted by IPCC (Intergovernmental Panel on Climate Change). For example, some municipalities in Sweden have plans for protection walls against future rising sea levels and decisions have also in some cases been taken to build walls. All these measures and […]
Publiceringsdatum
Författare
Erik Särner
Nyckelord (Keyword)
Climate change, sea level rise, protection walls
Nummer
1-2
Årgång
79
Utgåva
To link geophysical field data to specific biological phenomena, controlled laboratory experiments are needed for the understanding of the response of geophysical parameters to changes in biological conditions. In this study, suspensions of bacteria were mixed with sand to create a biofilm growing on a surface and these mixtures were monitored using the geoelectrical spectral […]
Publiceringsdatum
Författare
Tina Martin, Sofia Åkesson. Catherine J. Paul
Nyckelord (Keyword)
Biofilm, Geophysics, SIP, Bacteria, Metabolites, SEM, qPCR, HPLC
Nummer
1-2
Årgång
79
Utgåva
On 18 August 2022, an extremely very local 45 minutes storm fell over Båstad. There are several observations close to or more than mm. In the summer 1937 there was a famous long-lasting rain, for which the daily value was 150 mm. During the summer 2007, there were many large rainstorms of around 75 mm. […]
Publiceringsdatum
Författare
Lars Bengtsson
Nyckelord (Keyword)
Extreme rain, 45-min rain, daily rainfall, Båstad, Sweden
Nummer
1-2
Årgång
79
Utgåva
In this article, we present experiences from 40 years of field studies in Scania, southern Sweden, of sewage sludge application on arable land. The field studies have been conducted with the same trial plan at two locations outside the cities of Malmö and Lund, respectively. The trial plan includes nine combinations of sludge application and […]
Publiceringsdatum
Författare
Agneta Thor Leander, Ulrika Dyrlund Martinsson, Hans Bertil Wittgren
Nyckelord (Keyword)
sewage sludge; arable land; field studies; crop harvest; soil organic matter; plant nutrients; heavy metals; organic micropollutants; microplastics; antibiotic resistance
Nummer
1-2
Årgång
79
Utgåva
The aim of this article is to present an approach (modus operandi) for producing recommendations regarding potential hydropower development. A study of attached algae in 27 streams in mid Sweden according to extension of hydropower or not was carried out. The samples were taken already in 1982 and some of the streams and parts of […]
Publiceringsdatum
Författare
Catarina Johansson
Nyckelord (Keyword)
hydropower, Sweden, attached alg
Nummer
1-2
Årgång
79
Utgåva
The electricity prices in Sweden and Europe during 2022 have reached very high levels. The main reason for this being the war in Ukraine, which has led to a decreased availability for gas. During summer, the electricity prices reached extreme levels when meteorological and hydrological factors worsened the situation on the electricity market. The highest […]
Publiceringsdatum
Författare
Stefan Söderberg, Magnus Persson
Nyckelord (Keyword)
electricity prices, hydrology, hydrological balance, low flow
Nummer
4
Årgång
78
Utgåva
Flowing water impacts bridges over rivers primarily in two ways: (1) hydrodynamic forces that directly impact the structure and (2) scouring at piers and abutments, including contraction scour. The design prin-ciples for bridges in Sweden, including both impacting forces and local scour, are relatively simplistic. The purpose of this paper is to examine the impact […]
Publiceringsdatum
Författare
Assad Tahir, Fainaz Inamdeen, and Magnus Larson
Nyckelord (Keyword)
Extreme river flow, River hydraulics, Bridge scour, HEC RAS, Ljungby, Lagan
Nummer
4
Årgång
78
Utgåva
Placing water tanks or water pipes under water has the advantage that the walls are subjected to a much lower pressure difference. An underwater tank, where the walls are made from a flexible material like canvas, instead of metal or concrete, can adjust its volume to exactly the volume to be stored inside. Tennis tents […]
Publiceringsdatum
Författare
Jan-Erik Nowacki
Nyckelord (Keyword)
Underwater storage, pipe, canvas, Gotland
Nummer
4
Årgång
78
Utgåva
The need for knowledge about operation and maintenance of stormwater ponds increases as the number of stormwater ponds in the country increases and the ponds get older. It is partly about how ponds can be managed in a cost-effective way, partly how operation and maintenance efforts should be planned and how they affect the values […]
Publiceringsdatum
Författare
Jesper Persson, Jonas Andersson, Robert Jönsson, Astrid Berglund
Nyckelord (Keyword)
stormwater; pond; maintenance; operation; cost; pond design
Nummer
4
Årgång
78
Utgåva
Municipal water and wastewater pipe projects are often complex in terms of quality assessment, work environment, technology, time frames, personnel resources, and budget frames. If the water and wastewater pipes laid today are to maintain the service life that the Swedish Water and Wastewater Association (Svenskt Vatten) sets as a goal, 100 – 150 years, […]
Publiceringsdatum
Författare
Helena Mårtensson Winberg, Daniel Ejdeholm, Jimmy Lubera och Måns Troedsson
Nyckelord (Keyword)
Handbook, construction management, control, water pipes, wastewater pipes
Nummer
3
Årgång
78
Utgåva
Unintentional or planned operations of valves and pumps create pressure waves, called transients, which travel through pipe systems with the risk of, among other things, breakage and fatigue. Knowledge about transients in pipes and associated effects are not new. The problems with transients in Sweden were elucidated in a report published in the 1980s, where […]
Publiceringsdatum
Författare
Kristofer Kiste
Nyckelord (Keyword)
Transients, Water Hammer, Pressure Waves, Cavitation, Flow separation, Ram pump, Mantis shrimp
Nummer
3
Årgång
78
Utgåva
Climate change is expected to increase the frequency of fluvial, pluvial, and coastal flooding which must be considered in spatial planning. More frequent floods will also affect financial stability by increasing the exposure of risk for insurance companies and creditors. This study investigates how selected stakeholders assess flood risk when planning for new development and […]
Publiceringsdatum
Författare
Wilma Norlin, Hedda Skarsgård, Johanna Sörensen
Nyckelord (Keyword)
Urban flooding, Climate change adaptation, Urban planning, Insurances, County administra- tive boards, Municipalities, Real creditors
Nummer
3
Årgång
78
Utgåva
A parsimonious lumped model was developed for simulating a catchment composed of a landfill and recycling facility. The modelling results showed acceptable conformity with the observed values with NSE of 0.54 and R2 of 0.56 in hourly simulations, though the results were characterized by a general underestimation. The catchment model was coupled with a reservoir […]
Publiceringsdatum
Författare
Mazen Tawfik, Johanna Sörensen
Nyckelord (Keyword)
Parsimonious approach; Lumped modelling; Surface water; Landfill; Leachate water; Storage reservoirs
Nummer
3
Årgång
78
Utgåva
Modeller för att simulera effekter av flöde på strömlevande fiskpopulationer är kraftfulla verktyg för att avväga miljönytta och kostnad i samband med åtgärder för att minimera vattenkraftens miljöpåverkan. Vi jämförde en korrelativ och en individbaserad fiskhabitatmodell med avseende på vilka flöden respektive modell bedömde var gynnsammast för en potentiell havsöringspopulation i naturfåran vid Blankaströms kraftverk […]
Publiceringsdatum
Författare
Johan Watz, Mahboobeh Hajiesmaeili, Louis Addo, Olle Calles, Ola Nordblom, Johan Tielman, John J. Piccolo
Nyckelord (Keyword)
fish; flow; habitat; hydropower; modeling; river management; salmon; trout
Nummer
2
Årgång
78
Utgåva
Vi står idag inför stora utmaningar med att anpassa våra samhällen för att möta kommande klimatut-maningar i form av extrema väderhändelser. Dessa klimatförändringar och väderhändelser kan resultera i höjda havsnivåer och extrema översvämningar med förödande konsekvenser för människor och miljöer. Vattensektorn befinner sig i en nyckelroll för att hantera ett flertal av dessa utmaningar. Denna […]
Publiceringsdatum
Författare
Lisa Öborn och Robert Furén
Nyckelord (Keyword)
Climate change adaptation, Flooding, High sea levels, Robust stormwater management, sustai- nable stormwater management, Lake Mälaren - Riddarfjärden.
Nummer
2
Årgång
78
Utgåva
I Sverige utförs markbäddar nästan alltid med öppen botten. Precis som vid infiltrationer kommer då behandlat avloppsvatten att perkolera ner mot grundvattnet. Behovet av att kunna fastställa reduktionen av fosfor för denna typ av konstruktion ökar. En utmaning är då att man måste veta hur stor andel av flödet som perkolerar. I denna artikel redovisas […]
Publiceringsdatum
Författare
Johan Hedin
Nyckelord (Keyword)
horizontal, sand filter, beds, reduction, phosphorus, percolation, sampling, statistical, chloride, field
Nummer
2
Årgång
78
Utgåva
Urban flooding causes large societal damages and increased climate adaptation measures is needed. The rapid and local character of extreme rain events make them difficult to observe and predict, and to issue warnings for. There is also a lack of data on urban flood damages, mainly because of scarce and non- systematic data collection and […]
Publiceringsdatum
Författare
Lars Nyberg, Shifteh Mobini, Konstantinos Karagiorgos, Jonas Olsson, Rolf Larsson, Louise Petersson, Remco van de Beek, Kristin Gustafsson, Tonje Grahn
Nyckelord (Keyword)
intense rain, cloudburst, flood, damage, risk management, data, crowdsourcing, participation
Nummer
2
Årgång
78
Utgåva
The concept” Sustainability” has become an indeed demanding metaphor within society. However, without a deeper understanding and more accurate use of the word it may very well, by and by, become obsolete. In this paper the question is focused on the development of wastewater treatment. Some “curial” demands on a more specific approach to sustainability […]
Publiceringsdatum
Författare
Stig Morling
Nyckelord (Keyword)
Compact plant, complex compounds, historic perspective, nutrients
Nummer
1
Årgång
78
Utgåva
Chemical contamination of drinking water is of great concern for public health. Chemical analyses are used for monitoring of selected chemicals, however no information on potential toxicity of the mixture of chemicals in a water sample is obtained. Effect-based methods are new tools to evaluate the hazard of the whole mixture of chemicals present in […]
Publiceringsdatum
Författare
Agneta Oskarsson, Johan Lundqvist
Nyckelord (Keyword)
Aryl hydrocarbon receptor; bioanalysis; bioassays, bioanalytical tools, disinfection byproducts; effect-based analysis; endocrine activity; Nrf2
Nummer
1
Årgång
78
Utgåva
Hydrogen sulphide (H2S) causes odours and concrete corrosion even in very small concentrations. Con-crete corrosion of 5 cm in 5 years has been observed when the hydrogen sulphide content has been 20 ppm. Unavoidable hydrogen sulphide formation in pressure sewers begins when wastewater is put under anaerobic conditions. Anaerobic conditions begin after 0.5 – 2 […]
Publiceringsdatum
Författare
J. Sallanko, J. Arfman, M. Arbrandt
Nyckelord (Keyword)
Hydrogen sulphide; gravity aeration; step aerator; pressure sewer; concrete corrosion, odours; gravity sewer
Nummer
1
Årgång
78
Utgåva
Theoretical studies of the movement of moisture in an unsaturated zone are associated with the analysis of the Richards equations. The corresponding mathematical problems are designed to answer practical questions related to the replenishment of groundwater reserves, the degree of their protection from pollution coming from the surface, and the needs of agriculture. The value […]
Publiceringsdatum
Författare
A.Yu. Belyaev, I.O. Yushmanov
Nyckelord (Keyword)
Unsaturated zone, non-stationarity infiltration
Nummer
1
Årgång
78
Utgåva
This work kick-starts AI (artificial intelligence) for pipe management among Swedish water utilities. The current work with pipe management is mainly reactive; leaks are repaired after they are detected, sometimes with large costs if the leakage is extensive and critical. With this article, we want to focus on proactive pipe network management and discuss risk […]
Publiceringsdatum
Författare
Johanna Lykke Sörensen, Erik Nilsson, Martin Bjarke, Tommy Giertz, Didrik Nilsson
Nyckelord (Keyword)
drinking water distribution, pipe refurbishment, pipe renewal, risk analysis, consequence analysis
Nummer
4
Årgång
77
Utgåva
UV-LED technology is a modern method to safeguard drinking water by disinfecting water with UV-pho-tons generated in a light emitting diode (LED). The technology has received increasingly higher attention due to its capacity to generate UV-light without use of mercury with a number of additional benefits compared to traditional UV-lamps. UV-LED’s are fast, operated digitally, […]
Publiceringsdatum
Författare
Ida Ångbäck, Kenneth M. Persson and Catherine Paul
Nyckelord (Keyword)
UV-LED, light emitting diodes, pulsed mode, water disinfection
Nummer
4
Årgång
77
Utgåva
The article analyzes the observations of the impact of preserved landfills on the hydrosphere (ground-, surface water, and filtrate) of adjacent territories in the countries of Northern Europe and the Russian Federation. The behaviour of more than 80 components over a long time was analyzed. Graphs of changes in the most representative of them are […]
Publiceringsdatum
Författare
Anders Karlsson, Yuri A. Medovar, Victor P. Podsechin, Igor O. Yushmanov, Svetlana I. Yushmanova
Nyckelord (Keyword)
landfills of solid household waste, underground water, environmental pollution.
Nummer
4
Årgång
77
Utgåva
Using open-access data sets on water and soil from Swedish authorities and compiling them in a QGIS-programme made it possible to present and visualise the water budget of the Lagan River Catchment. Based on the estimations of the water volume in groundwater reservoirs and lakes the total maximum available volume in the Lagan River Catchment […]
Publiceringsdatum
Författare
August Bjerkén and Kenneth M. Persson
Nyckelord (Keyword)
water balance, water budget, catchment management, GIS, Lagan River Catchment
Nummer
4
Årgång
77
Utgåva
Faster methods of analysing microbiological quality of drinking water after pipe breaks or new pipe installations could have beneficial implications. In this article, a summary is presented of the findings in a recent master thesis about how flow cytometry and cultivation-based techniques can be used to monitor water quality in connection to maintenance works, and […]
Publiceringsdatum
Författare
Måns Zamore
Nyckelord (Keyword)
drinking water, flow cytometry, microbiology, maintenance
Nummer
4
Årgång
77
Utgåva
Tidigt i min yrkesverksamma karriär hade jag förmånen att bli kollega med en ”läcksökare Stenberg, numer inte längre med oss. Ja, Runo var snarast under flera år mästare i lokalisering or, och spred sitt kunnande mycket generöst. Han brukade ofta återknyta till citatet ovan kompletterande perspektiv i samband med vattenarbete har lärt mig att en […]
Publiceringsdatum
Författare
Stig Morling
Nummer
3
Årgång
77
Utgåva
A draft manifesto for strategic development and maintenance of pipes in water and wastewater systems is presented. Using five examples from research and development projects and programs for modern asset management in the Swedish water sector, eleven central items are formulated focusing on the need for development of management, staff, planning, innovation and digitalization. Substantial […]
Publiceringsdatum
Författare
Kenneth M Persson, Tommy Giertz, Ingemar Clementson, Johanna Sörensen
Nyckelord (Keyword)
Pipe maintenance; digitalization; asset management; strategic development
Nummer
3
Årgång
77
Utgåva
Ammonium nitrate-based explosives are the most commonly used explosives in various industries today, including mining, rock quarrying, and tunnel excavation for roads. Studies from the mining industry have, however, shown that up to 28% of the explosives remain undetonated. These undetonated explosives dissolve in water and eventually discharge to nearby surface water and groundwater recipients, […]
Publiceringsdatum
Författare
Roger B. Herbert, Albin Nordström
Nyckelord (Keyword)
Denitrification, remediation, nitrate, ammonium, quarrying, mining
Nummer
3
Årgång
77
Utgåva
As a result of urbanization and climate change, the flood risk in cities is increasing. If the cities are to increase their resilience toward this problem, a change in the planning and handling of stormwater and cloudbursts on a municipal level is a necessity. A master thesis from the fall of 2020 investigated how integration […]
Publiceringsdatum
Författare
Tove Rappmann, Norea Cardell,
Nyckelord (Keyword)
Integrated water management, risk governance, land use planning, urban flooding, Höje å
Nummer
3
Årgång
77
Utgåva
Bridges are important components in many transportation networks often spanning rivers and other water bodies. The failure of a bridge will cause significant direct and indirect economic losses to society. Scouring of the river bed around bridges is a principal mode of bridge failure typically associated with large floods. The risk of such scour may […]
Publiceringsdatum
Författare
Fainaz Inamdeen, Magnus Larson, Geraldine Thiere, and Carl Karlsson
Nyckelord (Keyword)
Bridge scour, Bend scour, Hard bottom scour, HEC RAS, River hydraulics, Rönne River
Nummer
3
Årgång
77
Utgåva
Publiceringsdatum
Författare
Peggy Piri
Nummer
2
Årgång
77
Utgåva
We have measured the length of otoliths from cod in 76 pellets regurgitated by cormorants (Phalacrocorax carbo sinensis), collected from the small island Ringburen in the By Fjord which is part of the fjord system between the Orust Island and the mainland. Using a mathematical formula developed in the present paper, we determined the individual […]
Publiceringsdatum
Författare
Lars-Olof Axelsson, Anders Stigebrandt
Nyckelord (Keyword)
Cormorant, Cod consumption, Byfjorden
Nummer
2
Årgång
77
Utgåva
Municipal water utilities often only have access to a sparse network of rain gauges (ca. 10 in Stockholm). With sparse networks there is a risk to under- or overestimate sewer flow calculations when showers pass between gauges, or when a spatially concentrated shower hits a gauge. Moreover, significant resources are required to keep the gauge […]
Publiceringsdatum
Författare
Mathias von Scherling, Carl Jonsson, Jafet Andersson, Remco (C.Z.) van de Beek, Jonas Hansryd
Nyckelord (Keyword)
Rain measurement, Commercial Microwave Links, Urban drainage modelling
Nummer
2
Årgång
77
Utgåva
Wave climate data for the Swedish provinces Skane and Halland, were hindcast using SWAN, a third-generation spectral wave model. The 40-year wave dataset, from 1979 to 2019, is made available through an open-access data portal (https://gis.sgi.se/vagmodell/). The wave data has a three-hour resolution and includes significant wave height, peak wave period, and wave direction. The […]
Publiceringsdatum
Författare
Anna Adell, Almir Nunes de Brito Junior, Björn Almström, Bradley Goodfellow, Sebastian Bokhari Irminger, Caroline Hallin, Johan Nyberg
Nyckelord (Keyword)
Wave climate, SWAN, Skåne, Halland, hindcast waves
Nummer
2
Årgång
77
Utgåva
A circular bioeconomy is one in which waste streams from the processing of renewable bio-resources are looped back into the technosphere – open-loop or closed-loop recycling or conversion from matter to energy. This systematic review brings together a small set of 46 publications from the period 2016 – 2021, sourced from 28 journals and originating […]
Publiceringsdatum
Författare
G Venkatesh
Nyckelord (Keyword)
Anaerobic digestion, Biogas, Bioproducts, Circular bioeconomy, Wastewater, Sewage sludge
Nummer
2
Årgång
77
Utgåva
Missförstånd och ineffektiva arbetssätt hindrar en hållbar och säker dagvattenhantering i Sverige. Det kommer bli svårt att nå målen om en förbättrad vattenmiljö och minskade skador till följd av översvämningar om vi inte börjar uppmärksamma detta och hantera de problem som faktiskt finns. Jag är rädd att vi ser det vi vill se och missar […]
Publiceringsdatum
Författare
Olof Jonasson
Nyckelord (Keyword)
storm water systems
Nummer
1
Årgång
77
Utgåva
Data compiled by Svenskt Vatten show that in recent years, the levels of diclofenac measured in Swedish lakes, streams and coastlines have exceeded the limits for good ecological status in 18 locations. There is a risk that the limit will be exceeded in an additional 109 Swedish water bodies. Thus, the prevalence of diclofenac is […]
Publiceringsdatum
Författare
Anders Finnson
Nyckelord (Keyword)
diclofenac, water environment, phasing out
Nummer
1
Årgång
77
Utgåva
Water shortage is a problem in the Middle East and Northern Africa (MENA). The population growth is estimated to be high. Given the hydrological situation and the estimated huge population growth, people will try to escape from poverty and conflicts. To counteract these effects, resources must be allocated to implement more efficient use of the […]
Publiceringsdatum
Författare
Erik Särner
Nyckelord (Keyword)
Water scarcity; Irrigation; Food production; Population increase; Migration; Conflicts
Nummer
1
Årgång
77
Utgåva
When did the concerned water environment protection started in Sweden? The question is of course not easily responded. In this essay an important cornerstone is chosen: The year 1930. The chosen time contains two important invents in the Swedish water protection history: The City of Stockholm decides the location and construction of the main wastewater […]
Publiceringsdatum
Författare
Stig Morling
Nyckelord (Keyword)
Water laboratory, fish life protection, water protection development, EPA
Nummer
1
Årgång
77
Utgåva
Publiceringsdatum
Författare
Rolf Larsson
Nummer
4
Årgång
76
Utgåva
The modern use of water for various needs result in a complex polluted wastewater. The needs to purify the used water will by time deepen into more demanding questions. The needs for an efficient and on-site control will thus become more and more pronounced. This paper focuses on the importance to have an efficient laboratory […]
Publiceringsdatum
Författare
Stig Morling
Nyckelord (Keyword)
water laboratory, analysis accuracy, water quality
Nummer
4
Årgång
76
Utgåva
Ground water shortage is an increasing problem, and for communities where the raw water consist of ground water, droughts can cause severe problems. One approach to solve the decreased groundwater resources is to utilize the potential in the sewage water. One village which has faced problems in the drinking water production in the past years […]
Publiceringsdatum
Författare
Esmeralda Frihammar
Nyckelord (Keyword)
Wastewater reclamation, circular wastewater systems, WWTP, DWTP, Hurva
Nummer
4
Årgång
76
Utgåva
The paper presents a short overview on what historical documents and archeological findings tell us on how humanity has regarded and used water during the period 5000 – 500 BC. The most important conclusions are that water and water use to a large extent has defined societal development and controlled but with time also been […]
Publiceringsdatum
Författare
Kenneth M Persson
Nyckelord (Keyword)
Stone age; Bronze age; Iron age; Ancient water management; Biblical water; Herodotos
Nummer
4
Årgång
76
Utgåva
Utredning kring val av varaktighet vid skyfallskarteringar / Investigation of the choice of rain duration’s impact on urban flood mapping As a result of intensive cloudbursts, runoff creates pluvial flooding. The risk for more extensive flooding increases in urban areas where a majority of the land use consists of impervious areas. At the same time, […]
Publiceringsdatum
Författare
Lina Skilberg
Nyckelord (Keyword)
cloudbursts, pluvial flooding, storm duration, design rain
Nummer
3
Årgång
76
Utgåva
The history reflected in water may reveal both fundamental and sometimes astonishing insights. In this short essay we meet two Swedish very experienced engineers, both also representing a humanistic profile. The first one to meet is the late professor Bo Hellstrom, at the Royal Institute of Technology. As a young engineer he was intrigued by […]
Publiceringsdatum
Författare
Stig Morling
Nyckelord (Keyword)
Israel escape, scientific approach, water mill, small-scale model
Nummer
3
Årgång
76
Utgåva
In Rio Grande do Sul (RS) in Brazil, more than one million residents rely on small-scale water supply solutions without conventional treatment. This study aimed to investigate water services in rural areas of RS through case studies and interviews with authorities, researchers and support organizations within RS. Microbiological contamination is widespread, while non-compliant fluoride levels […]
Publiceringsdatum
Författare
Häggqvist, J., A. Larsson, A.D. Benetti, K.M. Persson
Nyckelord (Keyword)
Sustainable development goal 6; Rural water supply; Drinking water safety; Rio Grande do Sul
Nummer
3
Årgång
76
Utgåva
Urbanization with growing and denser cities in combination with climate change requires a smart land use with multifunctional facilities. One such example is structural soils that have a bearing capacity to handle loads, create favorable conditions for trees and handle stormwater with purification and delay. In this study, interviews with municipal employees have been conducted […]
Publiceringsdatum
Författare
Carl Edström
Nyckelord (Keyword)
MIKE URBAN+; structural soil; stormwater management; hydraulic modelling
Nummer
3
Årgång
76
Utgåva
The investment rate in Sweden’s public water and wastewater systems have increased in recent years due to an increased need for renewal and replacements of older systems, as well as for new investments in pipe systems, pumping stations, water works, and water treatment plants. In 2017 about 12 billion SEK was invested in the public […]
Publiceringsdatum
Författare
Helena Mårtensson, Rickard Hugosson, Jimmy Lubera
Nyckelord (Keyword)
Project management, Water Utilities, investment projects
Nummer
2
Årgång
76
Utgåva
This study aimed to forecast combined sewer flow into a wastewater treatment plant in Lund, Sweden by using uncalibrated X-band radar data with a neural network. Neural networks have proved themselves useful in the field of forecasting as they can solve multiple kinds of problems and recognise patterns in the data as well as model […]
Publiceringsdatum
Författare
Filip Faust, Per Nelsson
Nyckelord (Keyword)
X-band radar, neural network, combined sewer flow
Nummer
2
Årgång
76
Utgåva
During 2017, two incidents with coliform bacteria in the drinking water occurred in Lund, South Sweden. Boil water advisories were issued and the extensive work began to limit the affected areas, find the sources of contamination and restore the network to normal conditions. During both incidents, hydraulic modelling was used as part of the trace […]
Publiceringsdatum
Författare
Barup, J., S. Steen Kronborg, V. Pelin, H. Aspegren, T.H. Persson, H. Lundgren
Nyckelord (Keyword)
Boil water advisory; Contamination; EPANET; Hydraulic modelling; Trace methodology
Nummer
2
Årgång
76
Utgåva
Most coastal countries lack a coherent marine policy or set of coherent policies covering various marine policy areas. These include, for example, fishery, aquaculture, mineral extraction, transport, military de- fense, environmental protection and conservation, pipelines, energy production, coastal development, tourism, other marine activities and overall, the climate. Often there is an inability to see and […]
Publiceringsdatum
Författare
Kjell Grip
Nyckelord (Keyword)
Marine activities, policy, planning, management, research, responsibility
Nummer
2
Årgång
76
Utgåva
Publiceringsdatum
Författare
Mehran Naseri-Rad
Nummer
1
Årgång
76
Utgåva
Publiceringsdatum
Författare
Haoyu Wei
Nummer
1
Årgång
76
Utgåva
Publiceringsdatum
Författare
Yiheng Du
Nummer
1
Årgång
76
Utgåva
Publiceringsdatum
Författare
Sofia Högstrand
Nummer
1
Årgång
76
Utgåva
Increase of urbanisation and climate change are two factors that have been highlighted as they influ- ence the hydrological cycle. Both result in increased in peak flow within urban watersheds, leading to downstream flood-ing and increased pollution. In order to address this, Sustainable Drainage Systems (SuDS) have been adopted to support peak flow reduction and […]
Publiceringsdatum
Författare
B. Nsabimana, N. Utande Estallo, S. Adib Abou Rafee, J. Sörensen
Nyckelord (Keyword)
Hydraulics, Hydrology, Stormwater; Runoff, Modelling; MIKE URBAN
Nummer
1
Årgång
76
Utgåva
The presence of paralytic shellfish poisoning toxins (PSTs) in drinking water resources has urged the de- velopment of simple and fast screening tools for drinking water surveillance. This article aims to validate a quick test kit for freshwater PSTs detection. Preliminary estimates of the limit of detection (LODs) were done for 5 PSPs variants, namely […]
Publiceringsdatum
Författare
Jing Li, Kenneth M Persson
Nyckelord (Keyword)
Saxitoxin, LFA, detection limit, validation, quick test kit
Nummer
1
Årgång
76
Utgåva
We argue in this paper that Swedish urban areas have several urgent challenges when it comes to water governance and we propose seven principles for addressing them. Climate change and urban growth call for swift action to manage both water scarcity and flooding in an integrated way. This paper focuses on the municipal level for […]
Publiceringsdatum
Författare
Åse Johannessen, Rolf Larsson, Lena Blom, Dick Karlsson, Henrik Aspegren
Nyckelord (Keyword)
Water governance, urbanisation, extreme weather, nature-based solutions, climate adaptation
Nummer
4
Årgång
75
Utgåva
The summer of 2018 was extraordinarily dry, and the groundwater levels and water flows are still low at some places in Sweden. Changes in water use, a growing population, higher living standards and climate change are factors that increase the significance of these issues nationally and globally. Water scarcity affects different aspects of society, and […]
Publiceringsdatum
Författare
Maria Takman
Nyckelord (Keyword)
Wastewater reuse, 2030 Agenda, Advanced wastewater treatment.
Nummer
4
Årgång
75
Utgåva
A model for establishing effluent limitations for small scale wastewater treatment is presented in this article. The effluent limitations are based on the publication HVMFS 2016:17 from the Swedish Agency for Marine and Water Management. The proposed limitations have been adjusted based on waste content, water consumption and uncertainty of measurement. In addition, an analysis […]
Publiceringsdatum
Författare
Johan Hedin
Nyckelord (Keyword)
small scale waste water treatment, field sampling, effluent limitations
Nummer
4
Årgång
75
Utgåva
The Flommen Lagoon, southern Sweden, is a unique water body of great ecological and economic values. Thus, its protection against flooding and its water quality maintenance has always been a concern. The objective of this study was to investigate the water exchange between the lagoon and the sea with regards to the inlet properties and […]
Publiceringsdatum
Författare
Shuwei Wang, Almir Nunes
Nyckelord (Keyword)
Water exchange, Coastal lagoon, Numerical modelling, Inlet morphology
Nummer
4
Årgång
75
Utgåva
During the spring of 2019, I had the opportunity to visit two waterworks in northern Serbia, in Subotica and in Novi Sad. In the latter city, I was also given the opportunity to meet researchers at the University. Serbia is one of the Balkan countries affected by high levels of naturally occurring arsenic, which in […]
Publiceringsdatum
Författare
Stefan Johnsson
Nyckelord (Keyword)
Drinking water supply, Serbia, arsenic, natural organic matter, NOM
Nummer
3
Årgång
75
Utgåva
Our cities are extremely vulnerable against heavy rainfalls. This was clearly shown by the cloudbursts that occurred in Copenhagen 2011 and in Malmö 2014. These events was a wakeup call for many. In the present study, an interview study was conducted to highlight how flooding during cloudburst is currently handled in Sweden and neighboring countries. […]
Publiceringsdatum
Författare
Mikael Larsson Thymé, Lisa Sebbfolk, Magnus Persson
Nyckelord (Keyword)
Cloudburst, urban planning, climate adaptation
Nummer
3
Årgång
75
Utgåva
In recent years, X-band radar has emerged as a tool to improve the input data to rainfall-runoff modelling in urban catchments thanks to its high spatial and temporal resolution compared to other radars used for precipitation measurements. An X-band radar was installed in a pilot project run by VA SYD and LTH, ten kilometres east […]
Publiceringsdatum
Författare
Lisa Olsson
Nyckelord (Keyword)
X-band radar; MIKE URBAN; modelling; rainfall-runoff; online control
Nummer
3
Årgång
75
Utgåva
Ängelholm’s coast has eroded considerably in the past decade in part due to a period of frequent storms. As climate continues to change, parameters that increase erosion such as sea level rise and storm frequency will become exacerbated. Adaptation measures must be put into place in order to mitigate the impacts of coastal erosion. This […]
Publiceringsdatum
Författare
Anna Hamilton
Nyckelord (Keyword)
Coastal erosion, Vejbystrand, sand fences, LiDAR, remote sensing, climate change adaptation
Nummer
3
Årgång
75
Utgåva
This study employs extreme value analysis to estimate 10-, 50-, and 100-year return levels of wave runup and annual dune erosion on the basis of 40 years simulated data from Angelholm Beach, Sweden. The offshore wave climate is computed with the SMB-formulations and propagated nearshore with the SWAN wave model. The runup is computed with […]
Publiceringsdatum
Författare
Caroline Hallin, Nader Tajvidi, Björn Almström, Magnus Larson, Hans Hanson
Nyckelord (Keyword)
Runup, dune erosion, GEV, GPD, Ängelholm Beach
Nummer
2
Årgång
75
Utgåva
Agriculture constitutes the largest economic sector and professional occupation in Chad, and is undergoing rapid changes due to processes of population increase, institutional reforms, conflicts in neighbouring countries, increasingly globalized trade networks, and environmental changes. But despite their importance for livelihoods and economic growth, the specific patterns and drivers of change in the agricultural sector […]
Publiceringsdatum
Författare
Erik Nilsson
Nyckelord (Keyword)
Crop production, Chad, water, livelihoods, data management
Nummer
2
Årgång
75
Utgåva
Stormwater is frequently contaminated with organic pollutants such as polycyclic aromatic hydrocarbons (PAHs), phthalates and alkylphenols emitted from traffic and building materials. Filters with adsorbing materials have the potential to remove dissolved, colloidal and particulate organic pollutants from stormwater. The aim of this research project is to investigate how effectively filter materials remove dissolved organic […]
Publiceringsdatum
Författare
Karin Björklund, Loretta Y. Li
Nyckelord (Keyword)
Alkylphenols, alternative materials, PAH, phthalates, sorption studies, stormwater quality, stormwater management
Nummer
2
Årgång
75
Utgåva
At many wastewater treatment plants (WWTPs), rapid sand filters are used as polishing step before the wastewater is released to the recipient. Thus, after time, the media gets clogged and the filters are regularly backwashed. In case of poor backwashing, the next filtration cycle will begin with an inefficient filter. Agglomerates of media grains, flocculation […]
Publiceringsdatum
Författare
Dimitrova, I., Dabrowska, A.
Nyckelord (Keyword)
Rapid sand filter; chemical rehabilitation; mud balls; costs
Nummer
2
Årgång
75
Utgåva
The Journal of Water Management and Research (Vatten) celebrates 2019 its 75th anniversary with a special issue, republishing one article per decade from 1940 to 2010. In the present article, we summarize the development of Swedish water research and management based upon the material published in the journal. We read all issues of the journal, […]
Publiceringsdatum
Författare
Magnus Persson, Caroline Hallin, Magnus Larson, Rolf Larsson, Kenneth M Persson, Johanna Sörensen
Nyckelord (Keyword)
Vatten, history, Swedish association for water, research trends
Nummer
1
Årgång
75
Utgåva
Urban, pluvial flooding severely effects infrastructure, buildings and urban life during and after extreme rainfall. In this study, spatial analyses of flood claims from insurance companies and the water utility company of Malmö, VA Syd, are used to better understand the mechanisms and characteristics of pluvial flooding. The same data sets are used to analyse […]
Publiceringsdatum
Författare
Johanna Sörensen
Nyckelord (Keyword)
Pluvial flooding, extreme rainfall, blue-green infrastructure
Nummer
4
Årgång
74
Utgåva
Source water contamination is a main cause of waterborne disease outbreaks in Sweden and municipal sewage discharges often end up in water sources. At Arvidstorp wastewater treatment plant in Trollhättan, a disc filter has been installed with the primary aim of improving phosphorus reduction. To give permission, the County Administrative Board of Västra Götaland called […]
Publiceringsdatum
Författare
Johan Åström, Per Rundahl
Nyckelord (Keyword)
Sewage, pathogen, infection risk, drinking water, QMRA, disc filter, log removal
Nummer
4
Årgång
74
Utgåva
Lakes are suitable sentinels of climate change because they constitute a well defined ecosystem and they respond quickly to changes in climate. Many lakes in the northern hemisphere are covered by ice during winter and they are dimictic, which means that the water circulate two times each year. The ice not only prevents gas exchanges […]
Publiceringsdatum
Författare
Nils G.A. Ekelund, Jennie Sandström
Nyckelord (Keyword)
Climate change, lakes, phenology, temperature, thermal stratification, warming
Nummer
4
Årgång
74
Utgåva
The relatively calm area behind barrier island are favored locations for harbors even though the navigation through the inlet itself can be challenging. Different measures like dredging or coastal structures might be necessary to ensure the desired water depth to maintain a safe navigation. Iceland as an island country depends strongly on reliable navigational routes […]
Publiceringsdatum
Författare
Clemens Klante, Sigurður Sigurðarson
Nyckelord (Keyword)
hydrodynamic modelling; Iceland; tidal inlet; morphology; sediment transport; TELEMAC
Nummer
4
Årgång
74
Utgåva
India, being the second largest importer, and the largest consumer of phosphate fertilisers in the world, needs to focus on securing its supplies not merely by providing subsidies to importers but also focusing on recovery and recycling of phosphorus from waste streams. In the process, the country can avail of concomitant benefits like wastewater reclamation […]
Publiceringsdatum
Författare
G. Venkatesh, Arun Kansal
Nyckelord (Keyword)
industrial ecology tools, India, phosphate
Nummer
3
Årgång
74
Utgåva
A compact combined sewer overflow (CSO) treatment unit is set up and evaluated in pilot-scale. The pilotplant consisted of flocculation, coagulation and a microsieving system followed by a disinfection unit with either O3 or ClO2. Efficiency of the pilot-plant was evaluated with respect to reduction of Escherichia coli, coliform bacteria and intestinal enterococci as well […]
Publiceringsdatum
Författare
Salar Haghighatafshar, Filip Nilsson, Janne Väänänen, Marinette Hagman, Gerly Hey, Ulla E. Bollmann, Kai Bester, Karin Jönsson
Nyckelord (Keyword)
biocides; chlorine dioxide; CSO; disinfection; microsieving; ozone
Nummer
3
Årgång
74
Utgåva
The Kristianstadsslätten plain is located in south of Sweden and holds one of the largest aquifers in the country. Kristianstadsslätten has been of greatest importance for groundwater abstraction and an ever-increasing desire to intensify the groundwater abstraction exists. The aim of this paper is to determine if it is possible to implement artificial recharge at […]
Publiceringsdatum
Författare
Sandra Andersson, Kristofer Hägg, Kenneth M Persson
Nyckelord (Keyword)
Eskers, artificial recharge, Kristianstadsslätten, groundwater managment
Nummer
3
Årgång
74
Utgåva
As the population of the world increases, the demand for resources of different types will also grow. Water is one such resource. Pinch analysis, as a technique to optimise the utilisation of resources, had its origin in heat recovery and thereby the optimisation of fuel usage in the 1970s during the oil crisis. Since then, […]
Publiceringsdatum
Författare
G. Venkatesh
Nyckelord (Keyword)
Optimisation, Pinch analysis, Water Pinch Analysis, Wastewater, Water cascade
Nummer
3
Årgång
74
Utgåva
Soil-based wastewater treatment, i.e. septic tanks followed by an infiltration or a sandfilter bed is the most common solution for small scale wastewater treatment in Sweden. In this project four students have surveyed 217 households in a field study. Grab samples have been taken on both suspended solids from the septic tank and on the […]
Publiceringsdatum
Författare
J. Hedin
Nyckelord (Keyword)
Soil-based wastewater treatment, septic tanks, field research
Nummer
1-2
Årgång
74
Utgåva
In this work, a multi-criteria analysis (MCA) method has been developed for evaluation and comparison of alternative drinking water strategies. A selection process of options was proposed and three options for weighting purpose were compared. The work includes an introductory literature study for identification of criteria and indicators (K o I) used during assessment of […]
Publiceringsdatum
Författare
I. Sandström
Nyckelord (Keyword)
Multi-criteria analysis, strategies, drinking water, drinking water strategies, water and sanitation systems
Nummer
1-2
Årgång
74
Utgåva
Varför etableras en forskningsstation vid Bolmen? / Why establish a research station at lake Bolmen?
The article presents the initiative behind the Bolmen Research Station in Hylte Municipality, South Sweden, which was initiated in 2017, enabling site-based research, development and innovation on lakes and lake-based activities starting at Lake Bolmen. This lake is the main raw water resource for Skåne. Since 1987, the company Sydvatten has taken raw water from […]
Publiceringsdatum
Författare
K.M. Persson, L. Parkefelt, J. Rankinen
Nyckelord (Keyword)
Bolmen research station, water quality research, municipal water supply, Sydvatten, Sweden Water Research
Nummer
1-2
Årgång
74
Utgåva
As the population of the world increases, and economies continue to develop, energy, water, materials of different types, and nutrients for food production will be needed in ever-increasing amounts. The water-energy nexus is well-understood in research circles, but one could modify this paradigm to water-nutrients/materials-energy nexus in order to incorporate recovery of substances that can […]
Publiceringsdatum
Författare
G. Venkatesh
Nyckelord (Keyword)
Wastewater, sludge, resource recovery, nutrient recovery, biogas, bio-hydrogen
Nummer
1-2
Årgång
74
Utgåva
Kävlinge River is one of the largest, and most heavily fish-populated, watercourses in Scania. Eight dams and three active hydroelectric plants are located here, which cause environmental problems; organisms are prevented migration, reproduction and feeding being the biggest issues. Trout and eel, which depend on river accessibility and spawning areas, inhabits the river. This study […]
Publiceringsdatum
Författare
Josefin Tollgren, Julia Walldén
Nyckelord (Keyword)
Current velocities; Fauna passage; Sonar-based bathymetry; Restoration; Water Framework Directive
Nummer
4
Årgång
73
Utgåva
As the population of the world rises and economies grow, both energy and water will be needed in ever-increasing quantities. There is a delicate balance between these two resources called the energy-water (or the water-energy) nexus. One way to reduce the energy consumption associated with wastewater treatment is to use the sludge produced during the […]
Publiceringsdatum
Författare
Emma Johansson, G. Venkatesh
Nyckelord (Keyword)
Wastewater treatment, sludge digestion, biogas, energy, water-energy nexus
Nummer
4
Årgång
73
Utgåva
This study aims to preliminarily evaluate changes in the risk of cyanobacterial blooms in a eutrophic lake, Lake Vombsjön, in the southern Sweden and test the role of nutrients (phosphorus and nitrogen) in algae formation. Surface water such as lakes service great importance for drinking water supply, such as half of the drinking water in […]
Publiceringsdatum
Författare
Jing Li, Kenneth M Persson
Nyckelord (Keyword)
Harmful Algae Blooms, nutrients, N:P ratio, Lake Vombsjön
Nummer
4
Årgång
73
Utgåva
Human activities and climate change affect hydrological and sedimentological characteristics within catchments. For arid and semiarid areas this induces direct negative economic and environmental consequences on society. In fact, stability in the rainfall regime and less siltation trapped in reservoirs mean more water for irrigation, water supply, and better flood control. This is especially important […]
Publiceringsdatum
Författare
Sihem Jebari, Ronny Berndtsssson, Safouane Mouelhi, Cintia Uvo, Akissssa Bahri
Nyckelord (Keyword)
Discharge, rainfall, semiarid, siltation, trend analysis, Tunisia
Nummer
4
Årgång
73
Utgåva
Genom att under vintern lagra dricksvatten i den sedimentära berggrunden kan kommuner säkra och transportera en hel årsförbrukning av vatten. Metoden som undersöks i Kristianstad kan vara lösningen på Sveriges vattenbrist under sommaren.
Publiceringsdatum
Författare
Kristofer Hägg, Linda Randsalu
Nummer
3
Årgång
73
Utgåva
On November 13, 1872 an extreme flood occurred in the coastal areas surrounding the South Baltic Sea. An extreme storm surge in combination with high waves caused the death of about 300 people and more than 15,000 people lost their homes. Along the coast of Scania, southern Sweden, at least 23 people were killed and […]
Publiceringsdatum
Författare
Caroline Fredriksson, Beate Feldmann Eellend, Magnus Larson, Grit Martinez
Nyckelord (Keyword)
Coastal flooding, extreme storm surge, Backafloden, Nyårsstormen, the 1872 storm, the 1904 storm
Nummer
3
Årgång
73
Utgåva
The number and impacts of pluvial floods are likely to increase with the growth of our cities and as extreme weather is anticipated to intensify with climate change. Improved preparedness is needed which may be attained owing to recent development of high-resolution hydro-meteorological observations and forecasts as well as geographical data. This paper investigates the […]
Publiceringsdatum
Författare
Ivarsson, C.-L., Olsson, J., Pers, C., Hundecha, Y.
Nyckelord (Keyword)
high-resolution, rainfall-runoff modelling, HYPE, forecasting, pluvial flooding
Nummer
3
Årgång
73
Utgåva
Beach erosion is expected to increase as the sea level rises during the coming decades. A retreating coastline threatens infrastructure, settlements, nature habitats, and at the same time increases the flood risk in low-lying areas. On the Swedish south coast, beach erosion is a problem at present likely to increase due to the sea level […]
Publiceringsdatum
Författare
Caroline Fredriksson, Björn Almström, Hans Hanson, Magnus Larson, Olof Persson
Nyckelord (Keyword)
Beach nourishment, Swedish south coast, beach erosion, Bruun rule, coastline changes
Nummer
3
Årgång
73
Utgåva
Publiceringsdatum
Författare
Magnus Persson
Nummer
1-2
Årgång
73
Det pratas mycket om klimatförändringar, stigande havsnivåer och framtida hot. Men genom att studera historiska stormar, som inträffade innan vi började mäta vindar och vattenstånd, visar det sig att översvämningsrisken redan idag kan vara större än vad vi räknat med.
Publiceringsdatum
Författare
Caroline Fredriksson
Nummer
1-2
Årgång
73
De svenska avloppsreningsverken klarar inte av att rena bort alla de tusentals läkemedel som dagligen konsumeras i samhället och hamnar i avloppsvattnet. För att få bukt med problemet bör vi överväga att uppgradera reningsverken med nya reningsmetoder baserade på ozon eller aktivt kol.
Publiceringsdatum
Författare
Maja Ekblad
Nummer
1-2
Årgång
73
Arbetet med att hindra föroreningar från att hamna i vattnet, det så kallade uppströmsarbetet, kan leda till stor miljönytta om det görs på ett systematiskt sätt. En arbetsmodell har nu tagits fram för att underlätta och strukturera arbetet.
Publiceringsdatum
Författare
Emma Fältström
Nummer
1-2
Årgång
73
At several places in South Sweden, dune vegetation is removed from coastal dunes with the purpose to increase biodiversity in sandy habitats. At these sites, also morphological changes take place as the dunes are no longer stabilized by vegetation. In this case study at Ängelholm Beach in South Sweden, the effect of vegetation removal on […]
Publiceringsdatum
Författare
Janna Lindell, Caroline Fredriksson, Hans Hanson
Nyckelord (Keyword)
Dune vegetation, aeolian transport, dune erosion, coastal dunes
Nummer
1-2
Årgång
73
This brief article presents the results of a survey conducted by the author during a lecture on ‘Holistic Approach to the Study of Water and Wastewater Systems,’ as a part of the course – Treatment Technologies (Reningsteknik), taught in the Department of Chemical and Engineering Sciences, at Karlstad University (Karlstad, Värmland, Sweden). While all the […]
Publiceringsdatum
Författare
G. Venkatesh
Nyckelord (Keyword)
Sustainability, social, economic, environmental, weighting factors, Sweden
Nummer
1-2
Årgång
73
This article considers cost-effective environmental policy instruments supporting the adoption of microalgae cultivation by wastewater treatment plants WWTPs coupled to biogas. One problem in reaching the nutrient reduction targets suggested by the Baltic Sea Action Plan has been differences among countries on their economic ability and on their willingness to pay for abatement. Another is […]
Publiceringsdatum
Författare
Mónica Campos
Nyckelord (Keyword)
wastewater treatment plants, native microalgal species, nutrient trading, mixed oligopoly situation, eutrophication, green-house gases, abatement efficiency, Baltic Sea
Nummer
1-2
Årgång
73
The Swedish army marched 1658 over the ice on the Danish sounds from Jutland to Zealand. An event that led to the foundation of Lund University in 1666. From the loads involved the ice thickness can be determined to have been at least 20 cm. Using data from mid-17 hundreds and forward the ice thickness […]
Publiceringsdatum
Författare
Lars Bengtsson
Nyckelord (Keyword)
Ice thickness, ice formation, bearing capacity of ice, Danish sounds, climate, Karl X Gustav
Nummer
1-2
Årgång
73
Recent UN reports show that most countries in northern Africa and the Middle East are facing water shortage. The percentage of renewable water resources withdrawn is extremely high. The population growth in most of these countries is estimated to be very high. Thus, the population is estimated to grow by 50 % in several countries […]
Publiceringsdatum
Författare
Erik Särner
Nyckelord (Keyword)
Water scarcity; Irrigation; Food production; World population; Population increase; Migration
Nummer
4
Årgång
72
Utgåva
The interest for membrane technologies has increased in Sweden during the past years. With this in mind, the Svenskt vatten utveckling (SVU) funded project “GenoMembran” was realized, to study improved removal of natural organic matter (NOM). Ultrafiltration with coagulation pretreatment could produce water of similar quality of current conventional treatments, while a tighter membrane, a […]
Publiceringsdatum
Författare
Angelica Lidén
Nyckelord (Keyword)
Drinking water, hollow fiber membranes, natural organic matter
Nummer
4
Årgång
72
Utgåva
In 2004 Svedala wastewater treatment plant constructed ten reed beds. The beds had, however, to be taken out of commission after just a few years, due to complications. Eight beds now stand empty, while two are up and running for a limited trial period. The municipality is interested in the possibility of converting the remaining […]
Publiceringsdatum
Författare
Douglas Hansson
Nyckelord (Keyword)
Reed beds, Svedala WTP, Pipe magazine, Detention basins, Horizontal Subsurface Flow Constructed Wetland
Nummer
4
Årgång
72
Utgåva
Vombverket, one of the major water treatment plants in south Sweden, originally built in the 1950’s, was significantly expanded in the 1990’s. Because of this expansion, the water flow path was prolonged. The plant was not optimized for the new process design with regard to the hydraulic conditions, but substantial pressure losses were introduced through […]
Publiceringsdatum
Författare
Ivan Ssenozi, Magnus Larson, Tobias Persson
Nyckelord (Keyword)
Hydraulic system, energy losses, capacity, components, Venturi meter, pipe flow, loop, nodes
Nummer
4
Årgång
72
Utgåva
The article presents a study assigned by SCA about water stress assessments on basin level for sites where SCA have pulp- and paper mills, paper mills or factories. Four tools were evaluated with the aim to find indices that measure water stress, i.e. lack of water of good enough quality for humans and the ecosystem. […]
Publiceringsdatum
Författare
Anna Wästerström
Nyckelord (Keyword)
water stress indices, global water tools, business water risk, CSR, NGOs, environmental models
Nummer
1
Årgång
72
Utgåva
The role of sediments in the phosphorus (P) dynamics of the Baltic Sea is often highlighted. The impact of the sediments on the water column is strictly limited by the amount of potentially mobile P available in the sediments. We present total P measurements for ten sediment cores from the Bothnian Sea and the Baltic […]
Publiceringsdatum
Författare
J. Mikael Malmaeus, O. Magnus Karlsson
Nyckelord (Keyword)
Baltic Sea, Bothnian Sea, eutrophication, hypoxia, phosphorus
Nummer
1
Årgång
72
Utgåva
Desalination is an important method for producing drinking water and it has been a freshwater supply alternative for a long time. The water resources in the Gulf Cooperation Council (GCC) countries, are mostly depending on desalination as a major source of (>80 %) drinking water, while the rest comes from groundwater. The largest number of […]
Publiceringsdatum
Författare
Raed Bashitialshaaer
Nyckelord (Keyword)
Desalination, Brine discharge, Field observation, Water resources, Oman, IDA, PAEW
Nummer
1
Årgång
72
Utgåva
The waterworks Ringsjöverket in Stehag in Skåne has a long prehistory prior its inauguration in 1963. In this paper, the background to how the waterworks developed from an idea to a full-scale regional drinking water treatment plant for the cities of Eslöv, Helsingborg and Landskrona is described for the period from 1947 to 1963. During […]
Publiceringsdatum
Författare
Kenneth M Persson,
Nyckelord (Keyword)
Regional water cooperation, Sydvatten, Eslöv, Landskrona, Helsingborg, Waterworks, Ringsjöverket, Water permit, slow sand filter
Nummer
1
Årgång
72
Utgåva
According to the authors’ many years of experience in coastal projects around Sweden, there is a great need for an improved Swedish terminology for engineering issues and planning of coastal areas. This article presents, thus, an English-Swedish dictionary, including explanatory comments, with an ambition to clarifying a wide range of words and expressions. This dictionary […]
Publiceringsdatum
Författare
Hans Hanson, Caroline Fredriksson, Magnus Larson
Nyckelord (Keyword)
Dictionary, coastal, engineering, planning, terminology, translation, kustordlistan.se
Nummer
2
Årgång
72
Utgåva
Due to climate changes and global warming, sea level rises. In Sweden, this affects primarily the coast of Skåne where land uplift is minimal. The understanding and commitment to coastal planning seems limited, and the reasons can be several; the question of responsibility is unclear, there is uncertainty about which measures are the best, the […]
Publiceringsdatum
Författare
Carola Wingren
Nyckelord (Keyword)
Artistic investigations, Climate adaption, Landscape architecture, Sea level rise, Site specific performance
Nummer
2
Årgång
72
Utgåva
This paper discusses the dynamics of coastal policy change in Sweden, using erosion and beach nourishments as an example. The Multiple Stream Model is a theoretical model on agenda setting and policy change developed by the political scientist John Kingdon (1984, 2003). This paper applies Kingdon’s model in describing and explaining coastal policy dynamics regarding […]
Publiceringsdatum
Författare
Lotte E. Bontje, Caroline Fredriksson, Zilin Wang, Jill H. Slinger
Nyckelord (Keyword)
Coastal policy, coastal management, erosion, beach nourishment, policy change, Scania, Ystad, Kingdon’s Multiple Stream model
Nummer
2
Årgång
72
Utgåva
The famous Danish astronomer Tycho Brahe initiated meteorological observations on the Island of Ven that were recorded in a diary, starting in October 1582 and lasting almost uninterruptedly until April 1597. Although the observations were mainly qualitative due to the lack of proper instruments and procedures in those days, a lot of useful information can […]
Publiceringsdatum
Författare
Magnus Larson, Caroline Fredriksson, Hans Hanson
Nyckelord (Keyword)
Meteorological observations, historical data, climate change, wind speed and direction, coastal evolution
Nummer
2
Årgång
72
Utgåva
Falsterbo Peninsula on the south coast of Sweden is low-lying and exposed to flooding. In 1872 the extreme storm surge Backafloden caused large devastation on the Swedish, Danish, and German coasts in the South Baltic Sea. For the Falsterbo Peninsula, the peak storm surge level is estimated to have been 240 cm above normal. If […]
Publiceringsdatum
Författare
Caroline Fredriksson, Nader Tajvidi, Hans Hanson, Magnus Larson
Nyckelord (Keyword)
Extreme sea levels, Coastal flooding, The Falsterbo Peninsula, South Baltic Sea, General Extreme Value distribution, General Pareto Distribution, Backafloden, 1872 storm surge
Nummer
2
Årgång
72
Utgåva
In this study a cost-benefit analysis (CBA) of a sustainable drainage system (SuDS) as a risk reduction measure is performed. The case is applied on the flood prone area Söderkulla in Malmö, where the focus of the study is quantification and valuation of the expected increase in ecosystem services as a result of the SuDS. […]
Publiceringsdatum
Författare
Kari Ella Read, Marika Karras, Johanna Sörensen, Alexander Cedergren
Nyckelord (Keyword)
Flood risk, ecosystem services, monetary valuation, cost-benefit analysis, CBA, climate change adaptation, sustainable drainage system, SuDS
Nummer
3
Årgång
72
Utgåva
The applicability of UV/VIS spectroscopy for the characterization of well water quality was studied by analyzing 219 private wells from sparsely populated areas of Finland. In addition to conventional water quality indicators, such as conductivity, nitrate and DOC, a series of UV/VIS spectroscopic parameters were determined: A-224, A-254, A-280, A-365, A-436, the area under 250–350 […]
Publiceringsdatum
Författare
Hilda Marta Szabo, Tuula Tuhkanen
Nyckelord (Keyword)
groundwater, UV/VIS, DOC, leaching, DOM, SUVA, HPLC-SEC
Nummer
3
Årgång
72
Utgåva
Due to climate change, more extreme precipitation is expected to strike cities around the world. Urbanization along with densification of urban areas magnifies the impact of heavy rainfall. More robust and flexible storm water systems that mimic processes of the hydrological cycle are needed to make urban environments more flood resilient. Such systems must be […]
Publiceringsdatum
Författare
Johanna Sörensen, Anna Johansson, Maria Nordgren, Catharina Sternudd, Magnus Persson
Nyckelord (Keyword)
Urban flooding, climate change adaptation, sustainable urban design
Nummer
3
Årgång
72
Utgåva
Med anledning av arbetet med EUs vattendirektiv skrev jag 2000 en debattartikel med titeln »Vatten – demokrati och inflytande med ett nytt EG-direktiv» (Karlsson 2000). Eftersom vattendirektivet hade en tidplan med flera delmål kändes det då frestande att beskriva ett framtidsscenario. Artikeln andas enorm optimism och entusiasm – svår att förstå så här i efterhand. […]
Publiceringsdatum
Författare
Anders Karlsson,
Nummer
3
Årgång
72
Utgåva
Precipitation and runoff are increasing due to changes in climate and urbanization. As a result, more stormwater is produced and needs to be handled locally. Internationally, roofs with vegetation are regarded as a suitable measure for sustainable urban drainage system (SUDS), but have not been much studied in Norway. For five years, two extensive green […]
Publiceringsdatum
Författare
Bent C. Braskerud
Nyckelord (Keyword)
Cold climate, design suggestions, draught, extensive green roof runoff, intensity-duration-frequency
(IDF), extreme precipitation, soil moisture, stormwater retention, runoff delay
Nummer
1
Årgång
71
Utgåva
Viable Water Management and Governance for Futures (VIWAFU), a professional network for international and interdisciplinary collaboration amongst researchers from the Nordic and Baltic countries, was built for providing and sharing knowledge on water management and governance for future policy and decision making during the years 2012–2014. VIWAFU organized four workshops for MSc students, PhD students, […]
Publiceringsdatum
Författare
Johanna Sörensen, Vuokko Kurki, Ruta Sidaraviciute, Samuel Ngari Kibocha, Inga Retike, Geoffrey Ikobe, Martynas Tichonovas, Erika Elijosiute, Riikka Rajala
Nyckelord (Keyword)
Network Building, interdisciplinary collaboration, Nordic and Baltic countries
Nummer
2
Årgång
71
Utgåva
During the late summer of 2014 there was a series of intense rainfall events, which caused severe flooding in several municipalities in Sweden. The by far worst event was the cloudburst in Scania, 31/8, not only in terms of rain intensities and volumes, but also the fact that the more intense parts of the rainfall […]
Publiceringsdatum
Författare
Claes Hernebring, Stefan Milotti, Susanne Steen Kronborg, Tomas Wolf, Erik Mårtensson
Nyckelord (Keyword)
Intense Rain Storm, Pluvial Flooding, Rain data, Rain statistics, Urban runoff
Nummer
2
Årgång
71
Utgåva
Urban water utilities have realised the importance and the possibility of improving the energy efficiency of their operations; and also have started looking at urban water utilities as essentially energy-producers. The driving factors are economic issues, environmental goals, self-image, public demands etc. Even Norway which enjoys an abundance of clean and green energy and freshwater, […]
Publiceringsdatum
Författare
G. Venkatesh, Hogne Nersund Larsen
Nyckelord (Keyword)
Water-energy nexus, energy efficiency, Urban water utilities, Norway
Nummer
2
Årgång
71
Utgåva
As a part of the BUCEFALOS project, which aims to decrease the eutrophication in the Baltic Sea, production wetlands has been constructed in the creeks Tullstorpsån and Albäcksån in the municipality of Trelleborg in Scania. The plants in the wetlands are to be continuously harvested, thereby ensuring that the phytoremediation efficiency of the wetlands is […]
Publiceringsdatum
Författare
Mimmi Ljungberg
Nyckelord (Keyword)
Production wetland, high value products, Phragmites Australis, Chara vulgaris, Cladophora s.p, Phalaris arundinacea, gibberellic acid, polypyrrole cellulose
Nummer
2
Årgång
71
Utgåva
In the early 70ies, water in lakes and streams in Sweden was generally clean enough for minimal water treatment to be considered sufficient. The situation was altered by the introduction of novel organisms, e.g., Cryptosporidium and Giardia, into Swedish waters. Since the year 2000, these unicellular parasites are inherent to several surface waters in Sweden. […]
Publiceringsdatum
Författare
Zdenek Vor
Nyckelord (Keyword)
parasites, cryptosporidium, contact coagulation-filtration, membrane filtration
Nummer
2
Årgång
71
Utgåva
This paper presents data on water quality and NOM characteristics from analyses of raw and treated water samples from some 30 water supply systems in Norway. Three different water treatment technologies were applied: (1) Enhanced Coagulation (EC); (2) Ozonation-Biofiltration (OBF); or (3) Nano-filtration (NF). The water samples were analysed using simple NOM characterisation methods and […]
Publiceringsdatum
Författare
B. Eikebrokk
Nyckelord (Keyword)
Drinking Water; NOM Characteristics; NOM Removal; NOM fractions, BDOC
Nummer
3
Årgång
71
Utgåva
Absorbency of UV and visible light by dissolved natural organic matter (DNOM) is used in proxies (sUVa, SAR) to assess its physiochemical characteristics and thereby removability of the DNOM by waterworks. The ongoing browning of surface waters is partly due to increased concentration and change in characteristics of DNOM. However, it is also likely that […]
Publiceringsdatum
Författare
R.D. Vogt, S. Haaland, G. Riise, B. Eikebrokk
Nyckelord (Keyword)
DNOM; Iron complex, adsorbency, sUVa, SAR
Nummer
3
Årgång
71
Utgåva
With significant problems caused by organics in drinking water, comprehensive knowledge of its concentration, character and reactivity in relation to catchment features and management is important. In a study reported here, six contrasting zero order catchments of the Myponga Reservoir, South Australia were selected to determine the impacts of catchment characteristics and land management practices […]
Publiceringsdatum
Författare
John Awad, John van Leeuwen, Christopher Chow, Mary Drikas,
Ronald J. Smernik, David J. Chittleborough, Erick Bestland
Nyckelord (Keyword)
Chlorine bulk decay; DOM; Land-use; Soil texture; THMFP
Nummer
3
Årgång
71
Utgåva
A qualitative and quantitative monitoring of biofilm formation was performed in four categories of water: raw water, filtered water (after removal of natural organic matter (NOM)), disinfected water and distributed water. The biofilm formation was reduced by 95–99 % as a result of the NOM removal, a reduction considerably more significant than indicated by the […]
Publiceringsdatum
Författare
Lars J. Hem, Bjørnar Eikebrokk, Ida Skaar, Aina C. Wennberg
Nyckelord (Keyword)
NOM, coagulation, regrowth, biofilm
Nummer
3
Årgång
71
Utgåva
Humic substances are formed in very different environment and the relations between properties (and structure) and precursor biota composition still is far from being clarified. The aim of this study was to analyse relations between properties of the peat, peat humic acids and humification degree on example of analysis of three bog profiles in ombrotrophic […]
Publiceringsdatum
Författare
M. Klavins and O. Purmalis
Nyckelord (Keyword)
Humic substances; composition; soil; peat Humic substances; composition; soil; peat
Nummer
3
Årgång
71
Utgåva
A decision support system (DSS) for control of the coagulant dosage at the Görväln drinking water plant has been developed and implemented. The goal with the DSS was to enable the transition from manual to automatic control of coagulant dosage. The DSS is based on a multivariate statistical regression (PLS) model mimicking the operators’ manual […]
Publiceringsdatum
Författare
S. Nilsson and F. Hallgren
Nyckelord (Keyword)
Precipitation; coagulant; dosage; decision support system; multivariate; model
Nummer
3
Årgång
71
Utgåva
This paper is a literature review of environmental systems analysis studies – adopting the LCA (life-cycle assessment) approach – of urban water and wastewater systems. Both with respect to the number of scientific journals referred to and the time-period of publication, the scope has been limited. The time period considered is 2000–2014, and the number […]
Publiceringsdatum
Författare
G. Venkatesh
Nyckelord (Keyword)
Life-cycle assessment, LCA, Urban water system, Environmental Systems Analysis, Water treatment, Wastewater treatment, Water distribution, Wastewater transport
Nummer
4
Årgång
71
Utgåva
Over the past years the southern beach of Nha Trang, located in the south central of Vietnam, has started to indicate signs of erosion in the northern part. As the beach plays an important role for this touristic hotspot, the fear that the erosion will become severe has been raised. The limited knowledge and few […]
Publiceringsdatum
Författare
Susanna Böös, Anna Dahlström
Nyckelord (Keyword)
Nha Trang, coastal evolution, longshore sediment transport, EBED, GENESIS, Vietnam
Nummer
4
Årgång
71
Utgåva
A scaled-up, continuous iron electrocoagulation reactor was built for drinking water treatment research. The impact of current density (i), metal loading (ML) and inter-electrode gap (d) on the removal of natural organic matter (NOM) was studied at 1.35 L/min. Removal performance was evaluated using UV-abs-254 and DOC analysis. Larger d provided the greatest reductions in […]
Publiceringsdatum
Författare
S.T. McBeath, K. Dubrawski, M. Mohseni, D.P. Wilkinson
Nyckelord (Keyword)
Electrocoagulation; water treatment; natural organic matter; pilot-scale; iron; coagulation
Nummer
4
Årgång
71
Utgåva
Stormwater is known to be a potentially large contributor of toxic substances to receiving waters. To be able to This study evaluates the potential of using natural plant extract in water treatment and its corresponding effects on the final treated water. Fluorescence excitation-emission matrices (EEMs) were used to characterise NOM in water treated using Okra […]
Publiceringsdatum
Författare
N. Jones, J. Bridgeman
Nyckelord (Keyword)
Seed extract; fluorescence-EEMs; natural organic matter; coagulation
Nummer
4
Årgång
71
Utgåva
Springs have always been used for water supply. The first settlements from the Stone Age were often located close to springs as well as many farms and crofts later on in the forests and highlands. Several of the growing towns and villages from the Middle Ages were supplied by water from springs. Spring cults were […]
Publiceringsdatum
Författare
Gert Knutsson
Nyckelord (Keyword)
Water supply, spring cult, mineral springs, spas, environmental control
Nummer
2
Årgång
70
Utgåva
Release and load of urban stormwater can affect biodiversity in recipients in both a short and long term perspective. For shallow lakes where natural shifts can occur between clear water and turbid water states due to asymmetric competition between different groups of algae, the role of urban stormwater load over the long term is of […]
Publiceringsdatum
Författare
Albin Månsson
Nyckelord (Keyword)
Chara, urban stormwater, meltwater, snowdump, biodiversity, nutrients, benthic algae, pelagic phytoplankton, Östersund, Sweden
Nummer
2
Årgång
70
Utgåva
Fog collection by man-made collectors has been proved to be a non-conventional source of water. Applications exist in many countries where conventional methods cannot provide an adequate supply of water. Alternative ways of gathering water in arid and semi-arid environments have always meant a challenge for dwellers of those areas. Recently, fog-water harvest is becoming […]
Publiceringsdatum
Författare
Jaime Espinosa and Linus Zhang
Nyckelord (Keyword)
water harvest, dew, fog, arid environment, sustainability.
Nummer
2
Årgång
70
Utgåva
Sustainable management of stormwater in urban environments can result in economic gains for the society. However, there are only a few studies made on the evaluation of social and environmental impacts of a sustainable urban drainage system. In the present work, a subjective method has been developed for evaluating the sustainability of elements from a […]
Publiceringsdatum
Författare
Anna Ludzia , Rolf Larsson, Stefan Aguayo
Nyckelord (Keyword)
Augustenborg; BMP; stormwater management; sustainability index; SUDS; urban drainage system
Nummer
2
Årgång
70
Utgåva
Brownification of water makes it harder to produce a high quality tap water. The humic content gives water a foul taste and fertilizes bacteria in the pipes. Most people are unanimous in that the brown colour in the surface water originates in the forest. But there are several understandings as to the reason why the […]
Publiceringsdatum
Författare
Moa Bydén, Stefan Bydén
Nyckelord (Keyword)
Brownification, Conifer, Absorption, Water colour, Run off, Drinking water, Humic acid
Nummer
2
Årgång
70
Utgåva
Bioretention cells (also referred to as raingardens or biofilters) are constructed as shallow vegetated depressions and are generally considered a flexible practice for local stormwater management. Runoff is retained at the cell surface before it percolates to the ground or is conveyed to the stormwater system. Flood risk is reduced via retention and volume reduction […]
Publiceringsdatum
Författare
Kim H. Paus, Bent C. Braskerud
Nyckelord (Keyword)
Bioretention, Biofilter, Raingarden, Stormwater, Cold Climate, Design, Infiltration, Saturated Hydraulic Conductivity, Low Impact Development, Sustainable Urban Drainage Systems
Nummer
3
Årgång
70
Utgåva
One technique for collecting rainwater and prevent soil erosion applied on large areas in Tunisia involves the use of soil ridges (1-1.5 m high). These contour ridges are constructed parallel to topographical isolines. The effects of the contour ridges on the soil water content distribution, bulk soil salinity ECa, and soil water salinity (ECw) were […]
Publiceringsdatum
Författare
Yasser Hamed, Magnus Persson, Ronny Berndtsson
Nyckelord (Keyword)
Spatial variability, semi-variogram, Tunisia, semiarid, contour ridges
Nummer
3
Årgång
70
Utgåva
The current status of storm-water management in the neighbor cities of Copenhagen and Malmö was studied with respect to present measures and the implemented systems in both cities. Application of blue-green solutions in the outer parts of Malmö started in the 1990s; hence collaboration between different departments in the municipality is more structured in the […]
Publiceringsdatum
Författare
Salar Haghighatafshar, Jes la Cour Jansen, Henrik Aspegren, Viveka Lidström, Ann Mattsson, Karin Jönsson
Nyckelord (Keyword)
Cloudburst, BMP, Three Points Approach, Climate change, Storm-water
Nummer
3
Årgång
70
Utgåva
The Tam Giang-Cau Hai lagoon in Vietnam has two inlets and outside one of them, the Thuan An inlet, a groin was constructed in 2008 to reduce sediment transport and prevent the inlet from closing. This groin has caused erosion and accretion of sediment on the adjacent coastline. The objectives of this study were to […]
Publiceringsdatum
Författare
Eva-Lena Eriksson, Madeleine Hjertstrand Persson
Nyckelord (Keyword)
Thuan An, Tam Giang-Cau Hai lagoon system, lagoon, inlet, groin, longshore sediment transport, Hue, GENESIS, preventing measures
Nummer
3
Årgång
70
Utgåva
Ystad municipality in the south of Sweden is working on an extension of the comprehensive plan for the main city and its surroundings. Ystad is situated on the coast and the effects of climate change are expected to be challenging in the future. Sea level rise will increase the risk of flooding and erosion in […]
Publiceringsdatum
Författare
Caroline Fredriksson, Hans Hanson, Olof Persson
Nyckelord (Keyword)
Climate change, Climate adaptation, Erosion, Flooding, Spatial planning, Coastal management, Coastal protection, Ystad
Nummer
4
Årgång
70
Utgåva
This study is being carried out at the behest of Oslo VAV (Vann og Avløpsetaten; Water and Sanitation Utility) personnel, as an additional test with the Dynamic Metabolism Model (DMM) developed at NTNU in Trondheim. It considers rehabilitation of drinking water pipelines as the only intervention in the entire system; and tests for different rehabilitation […]
Publiceringsdatum
Författare
G. Venkatesh
Nyckelord (Keyword)
Rehabilitation, replacement, water pipelines, Oslo, dynamic metabolism model
Nummer
4
Årgång
70
Utgåva
The study presented in this article addresses geophysical methods that can create 2D and 3D models that reflect the geology. The models can be used as a tool for mapping of groundwater resources. Four profiles, located in Vombsänkan in southeastern Skåne, have been investigated with Electrical Resistivity Tomography (ERT) and Transient Electromagnetic Soundings (TEM). The […]
Publiceringsdatum
Nyckelord (Keyword)
Geophysics, Resistivity, ERT, TEM, Geology, Hydrogeology, Aquifer, Groundwater, Skåne, Vombsänkan
Nummer
4
Årgång
70
Utgåva
The Swedish Society for Water celebrates its 70th anniversary 2014 and can thus look back on a comprehensive water deed during the years. In the journal Vatten (Water), that took ahead as Water hygiene in the year 1945, a large number of papers, abstracts and notes have been published, which describes this yield. In my […]
Publiceringsdatum
Författare
Kenneth M Persson
Nyckelord (Keyword)
The Swedish Society for Water, 70th anniversary, Water hygiene.
Nummer
4
Årgång
70
Utgåva
In a study of the neutralization capacity and limestone content the artificial recharge area of the Sydvatten waterworks Vombverket in Vomb, Skåne, five samples from different locations in the area was collected, sieved and acidified with hydrochloric acid. The neutralization capacity measured as calcium carbonate content was found to vary in the different sandy soil […]
Publiceringsdatum
Författare
Sandra Andersson, Per Möller, Linda Parkefelt, Kenneth M Persson
Nyckelord (Keyword)
Lake Vombsjön, neutralization capacity, artificial recharge, limestone dissolution, calcium
Nummer
1
Årgång
71
Utgåva
The microbiological quality of storm water runoff was monitored at four traffic-related sites in Trelleborg, Sweden to assess how microbiological pollution depends on rain intensity. Flow proportional storm water runoff samples were collected during the initial runoff and analyzed for total coliform bacteria, Escherichia coli, Clostridium perfringens, and intestinal enterococci. Microbiological pollution in storm water […]
Publiceringsdatum
Författare
Justyna Czemiel Berndtsson, Catherine Jane Paul
Nyckelord (Keyword)
microbiological pollution, rain intensity, runoff quality, storm water
Nummer
1
Årgång
71
Utgåva
The project is proposed in order to highlight the necessity for developing a climate-robust urban planning. The City Blueprint baseline assessment was chosen to evaluate the sustainability of urban water cycle services (UWCS) of Malmö and compare it with Rotterdam, Amsterdam, Hamburg and Copenhagen as cities which experienced extreme water events in their history. Although […]
Publiceringsdatum
Författare
Misagh Mottaghi, Henrik Aspegren, Karin Jönsson
Nyckelord (Keyword)
Adaptive Planning, City Blueprint, Climate change, Climate-robust planning, Urban Design,
Urban
Planning, Urban runoff, UWCS, Water resilience, Blue-Green infrastructure
Nummer
1
Årgång
71
Utgåva
Tunisia is a country with limited water resources and is in need of irrigation to sustain the agriculture. Treated wastewater is used as an irrigation water source in some areas. The use of saline treated wastewater can lead to soil salinization which could pose a serious threat to the agriculture. A field study was performed […]
Publiceringsdatum
Författare
Hanna Lundqvist, Emma Nilsson
Nyckelord (Keyword)
Tunisia, soil salinity, treated wastewater, irrigation, EM38, ECe, agriculture, irrigation efficiency,
soil salinity assessment, ESAP
Nummer
2
Årgång
69
Utgåva
Utilizing passive floodwater harvesting for artificial recharge and spate irrigation in arid and semiarid areas is an opportunity to use marginal water to improve the livelihood of rural community. In the present study, groundwater modeling to estimate recharge, and field experiments for spate irrigation of barley, were carried out to investigate the performance and potential […]
Publiceringsdatum
Författare
Hossein Hashemi, Ronny Berndtsson, Magnus Persson
Nyckelord (Keyword)
Groundwater modeling, water harvesting, artificial recharge, spate irrigation, arid area
Nummer
2
Årgång
69
Utgåva
Infiltration trenches are commonly applied for treatment of urban stormwater. However, the opinions whether their main purpose is to detain peak flows or to reduce pollutant loads of urban stormwater, are varying. In Sweden, there is also a lack of accurate data of the pollutant removal efficiencies and the results of the performed studies are […]
Publiceringsdatum
Författare
Erika Nilsson
Nyckelord (Keyword)
infiltration trenches, SUDS, urban stormwater drainage, pollutant removal, flow detention, suspended
solids, heavy metals, nutrients, flow weighted sampling, EMC
Nummer
2
Årgång
69
Utgåva
In the city of Landskrona the residential area Norra Borstahusen will be constructed. There is an interest to investigate the possibility of sustainable urban drainage for the area. The aim of this paper is to investigate if it is possible to uses swales do avert water from roads and houses during extreme rain events. This […]
Publiceringsdatum
Författare
Embla J. Myrdal, Erica Sternsén
Nyckelord (Keyword)
Sustainable urban drainage, swale, hydrological modelling, MIKE SHE, DHI, Norra Borstahusen, 10-year rainfall, 100-year rainfall
Nummer
3
Årgång
69
Utgåva
We are living in a time where we are being frequently reminded of the threat of a drastic climate change. Understanding the complexity of the climate remains a major challenge when trying to predict the consequences of this change. Nevertheless, there are today enough results from numerous studies to create a reasonable idea of possible […]
Publiceringsdatum
Författare
Karin Vendt, Sandra Ottosson
Nyckelord (Keyword)
Lundåkra bay, Natura 2000, wave runup, erosion, flooding, sea levels, climate change, bottom profiles
Nummer
3
Årgång
69
Utgåva
The demand for biofuel has increased in recent years as more countries desire to reduce their dependence on fossil fuels. Therefore, the amount of sugarcane plantations has rapidly increased in Brazil, one of the largest producers of ethanol from sugarcane in the world. This increase raises concerns of what effects this replacement of native vegetation […]
Publiceringsdatum
Författare
Claes Borglin, Sara Borglin, Fábio Pereira, Cintia B. Uvo
Nyckelord (Keyword)
Sugarcane expansion, Rio Grande basin, MGB-IPH, Land use changes, Surface runoff, Evapotranspiration
Nummer
3
Årgång
69
Utgåva
Hydraulic flocculation has been used in many different ways in drinking water treatment for many years. In this paper, the results of experimental work using an up-flow roughing filter for hydraulic flocculation prior to treatment with conventional rapid sand filtration are presented. The objective was to evaluate optimum flocculation conditions with up-flow roughing filtration and […]
Publiceringsdatum
Författare
Nelson P. Matsinhe, Kenneth M Persson
Nyckelord (Keyword)
water treatment; conventional treatment, roughing filtration; contact-flocculation-filtration
Nummer
3
Årgång
69
Utgåva
The outcomes from two Swedish IHP workshops on the use of numerical models in water management are presented. The workshops involved researchers and modellers from various parts of Europe and representatives from the Swedish water management sector. Recommendations of good practices in the use of models, with emphasis on local water management and stakeholder involvement […]
Publiceringsdatum
Författare
Lotta Andersson, Berit Arheimer, David Gustafsson, Karin Lexén, Karin Glaumann
Nyckelord (Keyword)
hydrological models, water management, stakeholder involvement, Swedish IHP
Nummer
3
Årgång
69
Utgåva
During three years there have been continuous activities on dissemination of results from the Swedish research project HYDROIMPACTS2.0, including dialogues and outreach to stakeholders and end users. Besides the traditional dissemination towards the academic community (e.g. scientific papers and conference contributions), the project included various web-based tools to facilitate hydrological climate change impact assessment as […]
Publiceringsdatum
Författare
Berit Arheimer, Jonas Olsson, Lena Strömbäck
Nyckelord (Keyword)
climate change; hydrology; impacts; downscaling; web-based tools; end users
Nummer
4
Årgång
69
Utgåva
According to the future scenarios from global and regional climate models, the climate change will profoundly affect hydrological processes at different scales in time and space. This paper presents results from a new generation of hydrological climate change impact studies, combining new methods for downscaling and bias correction of climate projections with new methods for […]
Publiceringsdatum
Författare
Berit Arheimer, Chantal Donnelly, Johan Strömqvist
Nyckelord (Keyword)
Catchment modeling, multi-basin, multi-variable, climate change, impact, hydrology
Nummer
4
Årgång
69
Utgåva
Two climate projections are used as forcing data in a hydrological model for the Lake Mälaren catchment, in order to evaluate the expected impact on nutrient fluxes (nitrogen and phosphorus) into the lake. Lake Mälaren comprises a large lake system, discharging into the Baltic Sea through the city of Stockholm, Sweden. Being a major fresh-water […]
Publiceringsdatum
Författare
René Capell, Jonas Olsson
Nyckelord (Keyword)
climate change, nitrogen, phosphorus, concentration, transport
Nummer
4
Årgång
69
Utgåva
Hydrology is strongly precipitation-dependent and hence hydrological modeling and forecasting requires accurate precipitation input for good performance. Hydrological climate change impact assessment thus requires good estimates of future precipitation. Climate modeling is the main means of estimating future precipitation, but it is seldom possible to directly use the precipitation output from climate models for meaningful […]
Publiceringsdatum
Författare
Jonas Olsson, Wei Yang, Thomas Bosshard
Nyckelord (Keyword)
climate change; hydrology; bias correction; downscaling
Nummer
4
Årgång
69
Utgåva
Pollutant transport in the unsaturated soil zone is a potential threat to surface and ground water resources. The intensity and volume of rainfall are the parameters that decide how fast and deep the pollutants will be transported. Climate models predict a future rainfall climate with higher total volume and higher intensities. In the present study […]
Publiceringsdatum
Författare
Magnus Persson, Jonas Olsson
Nyckelord (Keyword)
solute transport, unsaturated zone, climate change, HYDRUS-1D
Nummer
4
Årgång
69
Utgåva
Based on a 6-year simulation of the wave conditions for the Baltic Sea the wave climate at five locations along the Swedish SE coast was constructed. Using the WAM wave model to hindcast the waves between Jan 1st 2004 and Dec 31st 2009 the parameters significant wave height, direction of wave propagation, and spectral wave […]
Publiceringsdatum
Författare
Sebastian Irminger Street, Hans Hanson, Magnus Larson, Luciana Bertotti
Nyckelord (Keyword)
wave model, wave climate, WAM, wave atlas, Baltic Sea
Nummer
1
Årgång
70
Utgåva
Mining in Bolivia has been an important part of the economy for centuries, particularly in the Altiplano area. However, the mining activities have a negative effect on both the environment and the health of the people living in this area. This study summarizes knowledge of the historical as well as current environmental condition in four […]
Publiceringsdatum
Författare
Sara Eklund, Johan Lundström, Kenneth M Persson, María Eugenia García Moreno, Efraín Blanco
Nyckelord (Keyword)
Bolivia, Antequera, Surface Water, Drinking-water, Mining, Heavy Metals, Cadmium, WHO
Guideline Values
Nummer
1
Årgång
70
Utgåva
During recent years, Geographic Information Systems (GIS) as a powerful tool have had a tremendous impact on research techniques in the realm of geography and spatial analysis. The integrative ability of GIS to capture, store, manipulate, analyze, manage, and finally present all types of geographical spatial data, has drawn many attentions to it. Water Resources […]
Publiceringsdatum
Författare
Sina Khatami, Bahram Khazaei
Nyckelord (Keyword)
GIS, hydrological modeling, surface hydrology, rainfall-runoff modeling
Nummer
1
Årgång
70
Utgåva
A serious problem arising from intermittent supplies is the associated high level of contamination and public health hazards resulting either from ingress of contaminated water or from prolonged storage. This paper discusses the overall condition of the drinking water quality of intermittent water supplies in Mozambique. The network of Maputo is used as an example. […]
Publiceringsdatum
Författare
Matsinhe, N.P., D.L. Juízo, K. M. Persson
Nyckelord (Keyword)
intermittent water supply, household storage, chlorine decay, water quality Maputo
Nummer
1
Årgång
70
Utgåva
Heavily trafficked roads routinely generate a wide spectrum of pollutants, many of these are listed as priority substances according to the EU Water Framework Directive (WFD). Watercourses that intersect with major roads are exposed to both airborne and waterborne traffic generated pollutants, possibly deteriorating the receiving waters. Four bridges within the Segeån catchment area (in […]
Publiceringsdatum
Författare
MATTIAS FREDIN
Nyckelord (Keyword)
Road bridge, traffic pollutant, receiving waters, road runoff, Water Framework Directive
Nummer
3
Årgång
68
Utgåva
When Swedish wastewater treatment plants were rebuilt to include enhanced nitrogen removal, anaerobic ammonium oxidation (anammox) was far from being a mature technology. During the 2000s, the process has been introduced into sludge liquor treatment worldwide. The step to introduce anammox in the mainstream is decreasing, but lab- and pilot-scale studies on real municipal wastewater […]
Publiceringsdatum
Författare
D. J. I. Gustavsson, F. Persson, H. Aspegren, L. Stålhandske, J. la Cour Jansen
Nyckelord (Keyword)
Anammox, AOB, manammox, MBBR, nitrogen removal, NOB, wastewater treatment
Nummer
3
Årgång
68
Utgåva
Publiceringsdatum
Författare
Stig Morling
Nummer
3
Årgång
68
Utgåva
I våras arrangerade Föreningen vatten och Peter Stahres Stipendium en internationell konferens för att inspirera till kreativa lösningar för blå och gröna dagvattenlösningar som en viktig del i det hållbara stadsbyggandet och för att inspirera till flera stipendieansökningar. I detta nummer av Vatten presenteras korta sammanfattningar av föredragen tillsammans med en sammanfattning av de workshops […]
Publiceringsdatum
Nummer
3
Årgång
68
Utgåva
This paper is about the EU Flood Directive and its implementation in Swedish laws and regulations. The effect of the Directive on flood management in Sweden is analysed with special focus on physical planning. The Swedish Flood Ordinance gives most of the responsibility for flood related actions to national and regional authorities, with the Swedish […]
Publiceringsdatum
Författare
Dadi Thorsteinsson, Rolf Larsson
Nyckelord (Keyword)
EU Flood Directive, Sweden, implementation, physical planning, municipalities, Karlstad, Kristianstad
Nummer
4
Årgång
68
Utgåva
Microbiological quality of stormwater runoff from a green roof and in an open stormwater system in Augustenborg, Malmö, Sweden was studied. Since the stormwater is managed in an open system there is a possibility of human contact with that water and a potential risk for public health. Four locations have been selected as sampling points: […]
Publiceringsdatum
Författare
Ammar Hussain ,Justyna Czemiel Berndtsson
Nyckelord (Keyword)
microbiological indicators, stormwater quality, open stormwater system, green roof
Nummer
4
Årgång
68
Utgåva
A study of a shallow bay (Kalvöfjord) on the west coast of Sweden was conducted to determine the potential for wind waves to control the distribution of submerged macrophytes. A wave model was implemented, calculating the drag force exerted by the wave orbital motion. A new concept of “comfort zones” was introduced, ascribing an interval […]
Publiceringsdatum
Författare
Victor Veiderpass, Anders Stigebrandt
Nyckelord (Keyword)
modeling, wave exposure, drag, macrophytes, zonation, zostera marina, fucus, desiccation, comfort zones
Nummer
4
Årgång
68
Utgåva
Enzymatic pretreatment of algae by means of cellulose degrading enzyme was evaluated through lab-scale and pilot-scale experiments. The degradation efficiency of the enzyme depended on the initial physical quality of the algae. Lab-scale batch anaerobic digestion experiments showed comparatively low methane potential for the pretreated algae at both mesophilic and thermophilic temperatures. However, the raw […]
Publiceringsdatum
Författare
Salar Haghighatafshar, Hamse Kjerstadius, Jes la Cour Jansen, Åsa Davidsson
Nyckelord (Keyword)
Anaerobic digestion, Sulfate, Hydrogen sulfide, Enzymatic pretreatment, Marine macro-algae,
Micro-aeration
Nummer
4
Årgång
68
Utgåva
The EU Water Framework Directive was adopted 2000 and aims at achieving good water quality in inland and coastal water. Two significant changes are that water should be managed according to natural boundaries and the emphasis on involving public and concerned stakeholders. These challenges call for a broadened knowledge on how to incorporate the new […]
Publiceringsdatum
Författare
Frida Franzén
Nyckelord (Keyword)
Key words: stakeholder participation; water governance; EU Water Framework Directive; institutional
arrangement adaptive management
Nummer
4
Årgång
68
Utgåva
A one-dimensional, unsaturated transport model was used to simulate non-reactive transport of solutes. The effects of soil water hysteresis, and temporal variability in precipitation and evapotranspiration input data were evaluated. Simulations were conducted in HYDRUS-1D code for the period 1996–2008 for three different geographic locations in Sweden and for three different soil textures. Simulations were […]
Publiceringsdatum
Författare
Ruslana Gladnyeva, Alan Saifadeen
Nyckelord (Keyword)
HYDRUS-1D; Unsaturated zone; Hysteresis; Solute transport; Temporal variability of precipitation
Nummer
4
Årgång
68
Utgåva
The scope for wastewater treatment plants (WWTPs) widens to consider not only water quality and cost, but also energy efficiency and greenhouse gas (GHG) emissions. The on-going research project, “Development and dynamic analysis of operational strategies for enhanced energy efficiency of wastewater treatment systems” aims to develop a tool for integrated evaluation of energy efficiency […]
Publiceringsdatum
Författare
Magnus Arnell, Ulf Jeppsson
Nyckelord (Keyword)
wastewater treatment, benchmarking, automatic control, greenhouse gas emissions, modelling,
simulation,
energy efficiency
Nummer
4
Årgång
68
Utgåva
A multivariate analysis was applied to monthly climatic, hydrologic and water quality series of Lake Engelsholm, a shallow lake that was subjected to biomanipulation. In this study, we focused on identifying the most important patterns of monthly time series after biomanipulation. Moreover, we tried to quantify how those variables are interconnected with each other. A […]
Publiceringsdatum
Författare
Fábio Pereira, Carlos Ruberto Fragoso Jr, Cintia Uvo, David da Motta Marques
Nyckelord (Keyword)
Ecological modeling, principal component analysis, cluster analysis, biomanipulation, Lake Engelsholm
Nummer
1
Årgång
69
Utgåva
Detta är en översiktsartikel som ger inblick i nationalekonomins syn på och behandling av vatten. Artikeln förklarar begreppet värde och presenterar en rad metoder för att värdera vatten samt vilka svårigheter som finns med vattenvärdering. Vatten som en faktor i den globala ekonomin diskuteras också, samt att en rad möjliga lösningar på vattenrelaterade miljöproblem. Artikeln […]
Publiceringsdatum
Författare
Robert Knutsson
Nyckelord (Keyword)
environmental economics, willingness to pay, virtual water, emissions trading, tax
Nummer
1
Årgång
69
Utgåva
Using data gathered by the WASHCost project in Ghana, this study uses cost functions to predict capital expenditure for construction of piped water systems for small towns in Ghana. The data was collected from 45 small towns in peri-urban areas in the Volta, Ashanti and Northern regions of Ghana. Correlation and multiple regression analyses are […]
Publiceringsdatum
Författare
Kristoffer Ristinmaa, Kwabena Biritwum Nyarko and Bismark Dwumfour-Asare
Nyckelord (Keyword)
Ghana, small town water system, cost function, capital expenditure, multiple regression analysis
Nummer
1
Årgång
69
Utgåva
The objective of this study was to improve the aeration efficiency of a mid-size Swedish wastewater treatment plant in full-scale trials. The full-scale trials were performed at Sternö wastewater treatment plant, which was built in 1997 and is designed for 26,000 population equivalents. The biological treatment at Sternö wastewater treatment plant is performed in two […]
Publiceringsdatum
Författare
Viktor Larsson, Aleksandra Lazic´, Bengt Carlsson
Nyckelord (Keyword)
Aeration, aeration control, energy savings, fine bubble diffusers, wastewater treatment, nitrogen
removal
Nummer
1
Årgång
69
Utgåva
This field study constitutes an evaluation of resistivity surveys as a method of following subsurface water transport. An ABEM Terrameter LS was used to detect chloride enriched infiltrating water. A resistivity profile was established at a field site in Omma outside of Sjöbo, Sweden. The profile followed a slope starting atop a glacifluvial sand deposit […]
Publiceringsdatum
Författare
Mikael Lumetzberger, Torleif Dahlin, Magnus Persson
Nyckelord (Keyword)
Groundwater flow, resistivity, infiltration, wastewater, Omma, Sjöbo
Nummer
2
Årgång
69
Utgåva
The search for sustainable sources of energy has found a realistic replacement to fossil fuels in ethanol and methanol. In response to this trend, sugarcane plantations have rapidly increased in Brazil. In this study, this sugarcane expansion was mapped for the River Grande basin in the northern São Paulo, considering the real extension of the […]
Publiceringsdatum
Författare
Fábio Pereira, Mehriddin Tursunov, Cintia Uvo
Nyckelord (Keyword)
Sugarcane expansion, Automatic land use classification, Rio Grande basin, Landsat images
Nummer
2
Årgång
69
Utgåva
This study contains a series of laboratory experiments designed to describe the lateral movement and spatial variability of an infiltrated dye tracer across the capillary fringe of homogenous sand in an aquarium. A combination of image analysis and geoelectrical monitoring was used to track the flow paths of the dye with different hydraulic gradients and […]
Publiceringsdatum
Författare
PONTUS POJMARK, BENEDICT RUMPF, TORLEIF DAHLIN, MAGNUS PERSSON, and THOMAS GÜNTHER
Nyckelord (Keyword)
capillary fringe, lateral movement, dye tracer, image analysis, geoelectrical imaging, resistivity,
BERT
Nummer
3
Årgång
67
Utgåva
The aim of the present work was to investigate the erosion phenomena taking place at the coast in Bjärred and the possibility of introducing additional protective measures. An aerial photograph analysis showed that the beach has eroded an average of 4.3 m during the time period 1963–2002. Among the measures applied by the municipality in […]
Publiceringsdatum
Författare
CAROLINA DE MAS and JOHAN SÖDERGREN
Nyckelord (Keyword)
coastal erosion, runup, sediment transport, climate change, GENESIS, protective measures
Nummer
1
Årgång
68
Utgåva
Hydropower development has reduced the discharge in many Norwegian rivers and watercourses. This in turn, has affected fish communities and the biological diversity of these rivers in a negative way. Sills have been used extensively as remedial measures in regulated rivers for a long time. More varied measures are used today such as adjusting the […]
Publiceringsdatum
Författare
GUNNAR KRISTIANSEN
Nyckelord (Keyword)
Hydropower, Norway, biological diversity, remediation
Nummer
1
Årgång
68
Utgåva
In this work, physical and chemical characterization of El- Lajjoun retort water from oil shale pyrolysis process has been carried out. Comparison of different treatment methods (Air stripping, activated carbon, and oil shale ash) for the major components which could affect the design and operation of any set of wastewater treatment process were conducted. The […]
Publiceringsdatum
Författare
MOHAMMAD ALJARADIN
Nyckelord (Keyword)
Retort water, oil shale, air stripping, activated carbon, oil shale ash, El- Lajjoun, Jordan
Nummer
1
Årgång
68
Utgåva
During a one year long research project at Borensberg Waterworks, Motala, Sweden, water quality with respect to microscopic particle counts both in raw water and drinking water have been monitored by an online water quality monitoring system. Microscopic particle counts were documented with absolute values in real-time. In this paper, a discussion is introduced on […]
Publiceringsdatum
Författare
Jing Li and Kenneth M Persson
Nyckelord (Keyword)
Online Water Quality Monitoring System, microbiological water quality, microbiological contaminants, Borensberg Waterworks, Log Reduction, GEV (Generalized Extreme Value), threshold value definition
Nummer
1
Årgång
68
Utgåva
This article deals with flow design of wastewater treatment plants in Sweden. The traditional sewer system and the traditional approach of flow design of wastewater treatment plants are discussed. Based on the changes that the wastewater systems and the regulations surrounding them have undergone in Sweden over the past 40 years a new method for […]
Publiceringsdatum
Författare
HANS CARLSSON
Nyckelord (Keyword)
wastewater, flow design, combined sewer
Nummer
2
Årgång
68
Utgåva
Geographical space is a vital factor over a broad range of decision making problems. Participatory Resource Mapping (PRM) can be a vital tool for collection and assimilation of data on broader spatial scale with ease and accuracy. In this paper we seek to determine the connections between PRM and its linkages with the grassroots knowledge […]
Publiceringsdatum
Författare
WAFA SINGH and ARUN RANA
Nyckelord (Keyword)
Participatory Resource Mapping (PRM), Water Resources, Drinking water, Social Exclusion/Disparity, India
Nummer
2
Årgång
68
Utgåva
This paper presents an investigation of three vegetative buffer zones (BZ) (10 x 5 m) treating agricultural surface runoff. The experimental full scale BZs were located at Mørdre in south-east Norway. The average retention capacity in BZs (entire experimental period) with only grass and with trees and grass was respectively 33 and 46 % for […]
Publiceringsdatum
Författare
ANNE KRISTINE SØVIK, NINA SYVERSEN, ANNE-GRETE B. BLANKENBERG and TROND MÆHLUM
Nyckelord (Keyword)
vegetative buffer zone, agricultural runoff, vegetation cover, cold temperate areas
Nummer
2
Årgång
68
Utgåva
The aim of this study was to gather information about the Mafraq landfills sanitary status as well as assessing its leachate quality and the groundwater quality in its surroundings. The Mafraq landfill is located upon one of Jordan’s most important groundwater aquifer making it a possible threat to the water quality. The aquifer is used […]
Publiceringsdatum
Författare
NICOLAS SCHOEFFLER, MOHAMMAD ALJARADIN and KENNETH M PERSSON
Nyckelord (Keyword)
Groundwater quality, Uncontrolled Landfilling, Jordan
Nummer
2
Årgång
68
Utgåva
The United Nations 2010 revision of the world population estimates the population to increase from about 7 billion today to slightly more than 10 billion in 2100. In the most probable scenario the fertility will reach replacement level during the later decades of the period, after which the total population will not increase significantly. With […]
Publiceringsdatum
Författare
ERIK SÄRNER
Nyckelord (Keyword)
world population, population increase, water scarcity, food production, irrigation
Nummer
2
Årgång
68
Utgåva
Prefabricated package wastewater treatment plants are increasingly used to treat on-site discharges in Norway. The performance of these plants, and their compliance with national and regional legislation, has been thoroughly evaluated. During 2006–2008 two separate studies investigated 91 on-site wastewater treatment plants, in the Vansjø- and Hobøl Watershed. The removal of organic matter was satisfactory […]
Publiceringsdatum
Författare
ERIK JOHANNESSEN, ARILD SCHANKE EIKUM, MATS EK, TORE KROGSTAD and CHRISTIAN JUNESTEDT
Nyckelord (Keyword)
On-site, wastewater, phosphorus, nitrogen, sludge, pH, precipitation, Morsa, watershed, eutrophication
Nummer
2
Årgång
68
Utgåva
Urban infrastructure, such as the water and wastewater system, is at particular risk following climate change. Identifying vulnerable parts of the system contributes to safe and sustainable water and wastewater handling in a long term perspective. The aim of this study was to further develop a GIS-based methodology for mapping physical vulnerability of urban water […]
Publiceringsdatum
Författare
Katarina Larsson
Nyckelord (Keyword)
Vulnerability mapping, GIS, Vulnerability indices, Climate change, Water and wastewater infrastructure,
Stormwater drainage, Groundwater supply, Landslide, Pollution, Flooding
Nummer
3
Årgång
68
Utgåva
This paper presents the detection of moisture content in municipal solid waste incineration bottom ash (MSWI BA) with two different measurement techniques. The study used a frequency domain coaxial probe and a short TDR probe to evaluate and compare the performance of the both probes for lossy materials. Instead of using complex data conversion algorithms, […]
Publiceringsdatum
Författare
Aamir Ilyas
Nyckelord (Keyword)
Bottom Ash, TDR, FDR, Microwaves, Moisture, Salinity, PCA
Nummer
3
Årgång
68
Utgåva
Global increases in atmospheric CO2 and temperature are associated with an increase in the temperature of freshwater lakes and marine ecosystems. The ice breakup in lakes occur earlier which gives an opportunity for phytoplankton to grow early in the season. Another effect is a prolonged period of stratification in the lakes. Warming also may cause […]
Publiceringsdatum
Författare
Nils Ekelund
Nyckelord (Keyword)
Climate change, lakes, oceans, phytoplankton, CO2
Nummer
3
Årgång
68
Utgåva
The main objective of the present study was to apply a numerical modelling system to determine the wave transformation and sediment transport patterns in the Ystad Bay, Skåne, Sweden. This work was performed with emphasis on different time scales and various types of wave conditions. For this purpose, a preliminary study of background data for […]
Publiceringsdatum
Författare
S. Abbas Hosseini Sadabadi and Magnus Larson
Nyckelord (Keyword)
Numerical Model, EBED, Ystad Bay, Wave, Currents, Sediment transport
Nummer
3
Årgång
68
Utgåva
Results from wastewater treatment plants with their entire biological treatment step in a multi-reactor configured Moving Bed Biofilm Reactor process designed for nitrogen reduction is available on at least five places in Sweden. An evaluation has been made; of the design and reduction efficiency from these five wastewater treatment plants. The study confirms the idea […]
Publiceringsdatum
Författare
Gustaf Lustig and Carl Dahlberg
Nyckelord (Keyword)
Moving Bed Biofilm Reactor, Nitrogen reduction, Full-scale experiences, Design, Sweden
Nummer
3
Årgång
68
Utgåva
Urban Flooding in Gothenburg – A MIKE21 Study / Urban översvämning i Göteborg – En studie med MIKE21
Climate change has affected the extreme weather throughout the world. Studies have shown an increase of extreme precipitation in Gothenburg, Sweden. A two dimensional (2-D) hydrodynamic simulation model using MIKE 21 was developed as a tool to simulate stormwater related flooding in the central part of Gothenburg. The model was developed using topographical data and […]
Publiceringsdatum
Författare
Valeriya Filipova, Arun Rana and Prasoon Singh
Nyckelord (Keyword)
Gothenburg, two-dimensional hydrodynamic model, DHI MIKE 21, flood maps
Nummer
3
Årgång
68
Utgåva
Lyft inte havsmiljöfrågorna på bekostnad av en effektiv sötvattensförvaltning vid den nya Havs- och Vattenmiljömyndigheten. Håll samman ansvaret för förvaltningen av mark- yt- och grundvatten.
Publiceringsdatum
Författare
Kevin Bishop
Nummer
3
Årgång
66
Utgåva
Water supply must be solved in any habitat, whatever size. In the paper, some examples of water supply strategies are presented for ancient settlements, particularly in Scandinavia and with special focus on the large iron age settlement in Uppåkra in Scania, that has been inhabited during at least 1100 years. The results indicate that the […]
Publiceringsdatum
Författare
Kenneth M Persson och Lars Larsson
Nyckelord (Keyword)
Ancient water supply, iron-age, wells, Uppåkra, Scandinavia
Nummer
1
Årgång
67
Utgåva
In Scania there are 33 municipalities where 16 of these are located along the coast. Integrated Coastal Zone Management, ICZM, has been regarded as an effective and necessary strategy for maintaining the coast. Many of the activities in the coastal area are controlled by the Swedish Planning and Building act, PBL, which from some perspectives […]
Publiceringsdatum
Författare
Mikael Olenmark
Nyckelord (Keyword)
Integrated Coastal Zone Management, ICZM, Sweden, municipalities, collaboration, conflicts, communication, anchoring, sustainable, development, master plan, comprehensive, planning
Nummer
1
Årgång
67
Utgåva
An investigation has been performed to monitor the raw and drinking water quality in the Romanian counties Calarasi and Braila in the south-east of Romania. As a part of this investigation, fractioning of the natural organic matter (NOM) and determination of the regrowth potential as biodegradable organic matter (BDOC) has been performed. The plants treating […]
Publiceringsdatum
Författare
Lars J. Hem, Irina Lucaciu, Liliana Cruceru, Bjørnar Eikebrokk and Gøril Thorvaldsen
Nyckelord (Keyword)
Water supply, water quality, treatment, monitoring, NOM, fractioning, SUVA, BDOC, Romania, Danube
Nummer
1
Årgång
67
Utgåva
“Nature’s fury, Man’s folly!” As people of Mumbai were getting ready for work and children’s for school on morning of 26 July 2005, they had no idea what is coming for them in next 48 hours. It rained heavily leading to massive floods and other related damages to life and property. We still are helpless […]
Publiceringsdatum
Författare
Arun Rana
Nyckelord (Keyword)
Natural Disaster, Flooding, Sustainable development, Drainage System, Urbanization, Intensity-
Duration-Frequency, Climate Indices, Flood mapping, Climate change, Mumbai
Nummer
1
Årgång
67
Utgåva
Uncontaminated water is essential for life. That is a fact that ought to be a sufficient argument for groundwater aquifers and surface water resources to be considered as worth protecting from contamination. Despite this, numerous of contrarious interests exist that might lead to contamination of water. In this article it is discussed, that the type […]
Publiceringsdatum
Författare
Nina Runvik och Kenneth M Persson
Nyckelord (Keyword)
damage, surface water, ground water, protective value, worth to preserve, contaminating substances, The Water Framework Directive 2000/60/EG, ecosystem services, aquifers, drinking water
Nummer
1
Årgång
67
Utgåva
The cost for disposal of the dewatered sludge is dominating among the operational costs for sludge handling at municipal wastewater treatment plants. This, in turn, is affected by the dryness of the sludge. In this paper the results from parallel trials with two different dewatering techniques, at two different wastewater treatment plants (Sjölunda and Klagshamn […]
Publiceringsdatum
Författare
Ivelina Dimitrova, Hans Carlsson
Nyckelord (Keyword)
Sludge dewatering; Bucher press; Westfalia separator; economy
Nummer
1
Årgång
67
Utgåva
During the period 1840–1940, a large number of lakes in Sweden were drained or the water tables lowered. The driving forces behind these projects are discussed and the most important reasons behind them identified. A change in land ownership from collective towards private and undisputed control stimulated farmers to invest in improvements in the arable […]
Publiceringsdatum
Författare
Kenneth M Persson
Nyckelord (Keyword)
Lake lowering, land reclamation, water history, Lake Hjälmaren, Lake Näsbyholmssjön, lake bottom
degradation, wetland
Nummer
2
Årgång
67
Utgåva
Syria, as well as many other countries in the Middle East, faces serious water shortage problems. Available water per capita (AWPC) will dramatically decrease due to climate change, population increase, and water needed for economic growth. Rainwater harvesting can play an important role in increasing available water in Syria. However, the absence of rainwater sewer […]
Publiceringsdatum
Författare
KHALDOON MOURAD and RONNY BERNDTSSON
Nyckelord (Keyword)
Middle East, Syria, rainwater harvesting, climate change, reservoirs, water shortage
Nummer
2
Årgång
67
Utgåva
One option for coping with wasteful uses of fresh water in landscape irrigation is to use the treated greywater (GW). In the present study, an evaluation of a simple treatment system for reusing GW to irrigate green areas, trees, and ornamentals all over the campus in Tafila Technical University (TTU), Jordan, is presented. After 12 […]
Publiceringsdatum
Författare
Mohammad Aljaradin and Tarek Selim
Nyckelord (Keyword)
Grey water, Landscape irrigation, Tafila Technical University
Nummer
2
Årgång
67
Utgåva
A two-dimensional multi-fluid flow experiment was performed in a container (45 cm x 54 cm x 20 cm) filled with fine sandy soil. A dye stained light nonaqueous phase liquid (LNAPL) was applied in four releases over a rectangular area of 5 x 20 cm at the center of the soil surface. The releases varied […]
Publiceringsdatum
Författare
Sahar Ahmed Haridy, Magnus Persson and Ronny Berndtsson
Nyckelord (Keyword)
LNAPL, migration, detection, mapping, Time domain reflectometry
Nummer
2
Årgång
67
Utgåva
Many waste water treatment plants in Sweden needs to improve the nitrogen removal in the coming years in order to fulfill stringent regulatory requirements with respect to nitrogen in the final effluent from today’s level of 15–20 mg/l to 8–10 mg/l. At waste water treatment plants having anaerobic digesters, the nitrogen content in the reject […]
Publiceringsdatum
Författare
EMMA NIVERT, MARIA JOHANSSON, GERT PETERSEN och JEANETTE AGERTVED
Nyckelord (Keyword)
Reject water, ANAMMOX, nitrogen removal without carbon source, Simsholmens avloppsreningsverk,
Jönköping, waste water treatment
Nummer
2
Årgång
67
Utgåva
Active research has been going on to observe and validate the Power Law in physics, computer science, economics, linguistics, sociology, geophysics etc. This paper sets out to test the hypothesis that the Power Law is a feature of water and wastewater pipeline networks in cities. Databases from 30 different municipalities in Norway serve as the […]
Publiceringsdatum
Författare
G. VENKATESH and HELGE BRATTEBØ
Nyckelord (Keyword)
Urban water and wastewater pipeline networks, water pipelines, wastewater pipelines, power law,
pipeline stock analysis
Nummer
3
Årgång
67
Utgåva
Double ring infiltrometers are usually used by engineers, agronomists, and other professionals to estimate the infiltration rate of different soil types. Measurement of surface infiltration rate is necessary for many purposes (describing the soil permeability). In this study, the effect of land use in heavy clayey soil on soil infiltration rate was investigated using double […]
Publiceringsdatum
Författare
TAREK SELIM
Nyckelord (Keyword)
Infiltration rate, Double ring infiltrometers, the El-Salam Canal command, Egypt
Nummer
3
Årgång
67
Utgåva
Contemporary Swedish crisis management system have developed since the 1960s and during this time focus have changed from handling military threats and security of supply, to unpredictable and transboundary crisis. Local governments, responsible for much of the services to the citizens, have to handle the far reaching effect of climate change. At the same time […]
Publiceringsdatum
Författare
KATARINA KJELLMAN och PER-ERIK NYSTRÖM
Nyckelord (Keyword)
climate change, consumer, co operation, crisis management, crisis preparedness, drinking water,
National Food Administration, perception, surrounding world, uncertainty
Nummer
3
Årgång
67
Utgåva
The city of Amritsar today is facing the scarcity of water resources due to change in urbanization and other external externalities. Drinking water supply of city is entirely dependant on ground water resources, and the latter has been increasingly exploited at a rate that exceeds its natural replenishment. Besides this, major portion of water is […]
Publiceringsdatum
Författare
WAFA SINGH and DEVESH SHARMA
Nyckelord (Keyword)
Amritsar; Scarcity; water distribution, groundwater; over-exploitation; performance indicators
Nummer
3
Årgång
67
Utgåva
The present study used results from a ‘paleosimulation’ covering the Baltic Sea basin and the surrounding areas to investigate chaotic properties of temperature, precipitation, and runoff. Three periods between years 1000 and 1929 (1000–1199, 1551–1749, and 1751–1929), representing a warm, a cool, and an intermediate climate episode, respectively, were studied. Time series of annual temperature, […]
Publiceringsdatum
Författare
RONNY BERNDTSSON, BELLIE SIVAKUMAR, JONAS OLSSON, and L. PHIL GRAHAM
Nyckelord (Keyword)
Baltic Sea; regional hydrology; temperature; precipitation; runoff; nonlinearity; chaos
Nummer
3
Årgång
67
Utgåva
This study concerns the community involvement in water resource management in Namaacha City in Mozambique. The city has approximately 16 000 inhabitants. In 2005, the World Bank invested in new infrastructure for the water provision of the city, and water supply is since then handled by a private company. Water provision in the city is […]
Publiceringsdatum
Författare
Erik Nilsson and Kenneth M Persson
Nyckelord (Keyword)
Small scale water supply; Mozambique; Community involvement; water management; water tariffs
Nummer
1
Årgång
66
Utgåva
Phosphates are fixed in the enhanced biological phosphorus removal process and released from the Bio-P sludge in the digesters. The supernatant from digesters with large quantities of phosphate should be treated before it is recirculated to the treatment system to prevent phosphorus over-load in the system. Brackish seawater is concentrated to bittern for struvite precipitation; […]
Publiceringsdatum
Författare
Zhenhua Gao
Nyckelord (Keyword)
phosphate, EBPR, Bio-P sludge, digester, MAP, HAP, adsorption, bittern, Yellow Powder, Grey Powder
Nummer
1
Årgång
66
Utgåva
In commune Anse Rouge situated in north western Haïti there are many natural water sources but the availability of clean water is still a problem in most villages if not all. Since 2004 there are ongoing efforts to prevent contamination of the many natural open sources by capping and to promote the use of household […]
Publiceringsdatum
Författare
Mona Ezzelarab, Karen Engelke , Mackenson Nicolas
Nyckelord (Keyword)
On-field testing, microbiological, water quality, Haiti, potable water
Nummer
1
Årgång
66
Utgåva
Water and salt mass balances for the Dead Sea were modeled. Precipitation, evaporation, river discharges, ground water flows, input/output from potash companies and salt production, and brine discharge were included in the models. The mixing time in the Dead Sea was modeled using a single-layer (well-mixed) a two-layer (stratified) system. Using the single-layer approach the […]
Publiceringsdatum
Författare
Raed A.I. Bashitialshaaer , Kenneth M Persson and Magnus Larson
Nyckelord (Keyword)
Dead Sea water level; Water-Salt balance; Red Sea-Dead Sea Canal (RSDSC); Single-Layer and Two-Layer system; Salinity; Mixing time; Historical comparison.
Nummer
1
Årgång
66
Utgåva
Can wastewater treatment contribute to counteract global warming? Increased biogas production for substituting fossil fuel is one possibility. However, an active sludge process with biological nitrogen and phosphorus removal consume organic material, gives a sludge with less digestibility and need energy for aeration. The amount of produced sludge corresponds to half of the organic material […]
Publiceringsdatum
Författare
Erik Levlin
Nyckelord (Keyword)
Anammox, digesion, biogas, energy recovery, pilot plant Hammarby Sjöstadsverk, global warming, nutrient removal, phosphorus recovery, struvite, sewage sludge
Nummer
1
Årgång
66
Utgåva
This article puts forward the idea that the reduction efficiency in a stormwater pond to a great extent can be explained by three parameters related to the pond:– The size of the pond in relation to its catchment area– The relative size of the possible overflow past the pond– The mean concentration of suspended solids […]
Publiceringsdatum
Författare
JOAKIM PRAMSTEN
Nyckelord (Keyword)
stormwater, pond, treatment, pollution reduction, volume, overflow, sedimentation, suspended solids, metals, nutrient
Nummer
2
Årgång
66
Utgåva
A growing number of companies and organizations have started to recognize the importance of water to their business and have started programs to improve the sustainability of freshwater in their processes. Virtual Water and Life Cycle Analysis are methods used to measure the impact of water trade between countries and businesses. The concept of a […]
Publiceringsdatum
Författare
Cong Li and Stephen Ugochukwu Nwokoli
Nyckelord (Keyword)
Water footprint; Tetra Pak; environment; green water; water use; water consumption; embedded water; carton package; virtual water; LCA
Nummer
2
Årgång
66
Utgåva
Sydvatten (South Sweden Water Supply Co) was formed in 1966 by the municipalities of Malmö, Lund, Helsingborg, Landskrona and Eslöv for organizing and jointly financing the construction of an 80 km long raw-water tunnel leading water from the large lake Bolmen to the vicinity of the municipalities, and thereafter operating the tunnel and the waterworks […]
Publiceringsdatum
Författare
Kenneth M Persson and Jörgen Johansson
Nyckelord (Keyword)
Sydvatten, water supply strategies, Sweden, 1950–2010
Nummer
2
Årgång
66
Utgåva
Flooding in urban areas has increased and due to this fact extensive research about the effects of climate change on extreme rainfall is being done. This study is an attempt to determine how large the increase of extreme rainfall will be in Scania, Sweden. Through a literature study it is found that the recurrence interval […]
Publiceringsdatum
Författare
Håkan Emanuelsson
Nyckelord (Keyword)
Climate change, extreme rainfall, flooding, MOUSE, storm water
Nummer
2
Årgång
66
Utgåva
All forms of hydrological prediction involve many different sources of uncertainty. Many of these sources of uncertainty involve knowledge (epistemic) uncertainties that are not necessarily easy to represent statistically. This can create problems for communication and interpretation between modeller and users when uncertain predictions are presented. One way of dealing with this problem is to […]
Publiceringsdatum
Författare
Keith Beven, David Leedal and Ruth Alcock
Nyckelord (Keyword)
flood risk mapping; communication of uncertainty; epistemic error; hydraulic models; risk-based decisions
Nummer
3
Årgång
66
Utgåva
At the Käppala wastewater treatment plant (WWTP) in Stockholm, a novel approach for dewatering of sewage sludge has been developed. As in many wastewater treatment plants the dewatering is a costly part of the treatment process. The sludge produced at the plant must be hauled to be used on farmlands and dewatering greatly reduces the […]
Publiceringsdatum
Författare
ANDREAS THUNBERG
Nyckelord (Keyword)
Kemicond, hydraulic filter press, sludge conditioning, pathogen control
Nummer
3
Årgång
66
Utgåva
The access to safe drinking water is a basic and critical component of our society. If the drinking water supply system is exposed to disturbances, it is of great importance that water suppliers are able to maintain continuity within the water distribution system. This study analyses if the emergency planning of Swedish drinking water suppliers […]
Publiceringsdatum
Författare
JOSEFIN BARUP och SOFIE SAMUELSSON
Nyckelord (Keyword)
BS 25999, Business Continuity Management, BCM, drinking water, tap water, crisis, emergency
Nummer
3
Årgång
66
Utgåva
Separate biological treatment of sludge liquor, produced when dewatering digested sludge at wastewater treatment plants, can be favourable in achieving sufficient nitrogen removal. The treatment has the potential to decrease volume requirements and electrical energy and external carbon consumption. The characteristics of sludge liquor (high temperature, high ammonium concentration, low COD:N ratio) support high autotrophic […]
Publiceringsdatum
Författare
D. J. I. Gustavsson
Nyckelord (Keyword)
anammox; denitritation; full-scale; nitritation; sludge liquor
Nummer
3
Årgång
66
Utgåva
Kean Foster, Jonas Olsson and Cintia B. Uvo
Publiceringsdatum
Författare
Kean Foster, Jonas Olsson and Cintia B. Uvo
Nyckelord (Keyword)
Canonical correlation analysis, CCA, downscaling, HBV, hydrological forecasts, multi-method system, spring floods
Nummer
3
Årgång
66
Utgåva
Lake Poopó is a terminal lake of the Bolivian Altiplano, with high salinity and heavy anthropogenic pollution from centuries of extensive mining activity. This study aims to describe how the water quality of groundwater and surface water system in different subwater-sheds of the Lake Poopó varies with geology and hydrology. Measurements of total dissolved solids […]
Publiceringsdatum
Författare
M. E. GARCIA, L. BENGTSSON and K. M. PERSSON
Nyckelord (Keyword)
Groundwater, salinity, lake Poopo, Bolivia, acid mine tailings, water quality
Nummer
3
Årgång
66
Utgåva
Publiceringsdatum
Författare
Linda Åmand, Bengt Carlsson
Nummer
3
Årgång
66
Utgåva
Sweden and Finland have a long joint history separated in 1809 when Finland became an autonomous Grand Dutchy under the Russian Tsar. The water service sector started developing in urban areas during the latter part of the 19th century. The similarities and differences between Finland and Sweden in the water and wastewater services evolution are […]
Publiceringsdatum
Författare
Petri Juuti, Tapio Katko, Kenneth M Persson, Riikka Rajala
Nyckelord (Keyword)
water supply, sanitation, services, evolution, history, strategic decisions, Finland, Sweden, comparisons
Nummer
3
Årgång
65
Utgåva
Within the last decades, the data collection in Swedish municipalities has shown to be valuable with respect to gaining information on the statistics of heavy rain storms. This article is focused on rain data from Halmstad municipality, located in a region of the highest yearly precipitation amounts for Swedish conditions, especially in the interior parts, […]
Publiceringsdatum
Författare
Claes Hernebring och Mattias Salomonsson
Nyckelord (Keyword)
short-term rainfall, rain intensity, rain statistics, extreme events
Nummer
3
Årgång
65
Utgåva
In this paper Ce(IV)-La(III) binary hydroxide adsorbent, herein referred to as CLH adsorbent, which is a recovery of waste ceria powder from glass polishing process, is used as a novel adsorbent for removing inorganic arsenic (As) from water. The CLH adsorbent is prepared using a combined acid and heating treatment method, which involves refluxing the […]
Publiceringsdatum
Författare
Shan Chong, David Holmström, Qiurong Li, Tong Ouyang
Nyckelord (Keyword)
Arsenic removal, waste ceria, groundwater treatment, adsorption, Ce(IV)-La(III) binary hydroxide
Nummer
3
Årgång
65
Utgåva
The availability of drinking water from water wells on southern Gotland is highly limited on account of the fractured limestone bedrock of the region, and one possibility for supplying water in this region is to collect rainwater from roofs. For several years, rainwater was collected from a roof on southern Gotland in order to supply […]
Publiceringsdatum
Författare
Roger B. Herbert och Uno Erikson
Nyckelord (Keyword)
rainwater, water supply, bacteria, E. coli, filter, DAPI, coliform, microorganism
Nummer
4
Årgång
65
Utgåva
This paper reviews the acoustic conditions in water distribution pipes, comparing a typical background noise with the noise that can be registered when a leak is present. Five different acoustic characteristics are discussed, namely the resonance frequency of the pipe system, the turbulent pressure variations that are caused by a leak, the wide band noise […]
Publiceringsdatum
Författare
Gösta Lange
Nyckelord (Keyword)
water distribution pipes, pipe acoustics, leak acoustics, leak monitoring, leak localizing, leak noise, pipe resonance, turbulence, noise attenuation, sound losses
Nummer
4
Årgång
65
Utgåva
Urbanisation and population growth are increasing the pressures on cities, resulting in people living without adequate provision of water and sanitation. This is particularly the case in peri-urban areas surrounding urban centres in the developing world, where expansion of infrastructure cannot keep pace with rapid urbanisation. The problem is accentuated by peri-urban areas falling between […]
Publiceringsdatum
Författare
Anna Norström , Jennifer McConville and Jaan-Henrik Kain
Nyckelord (Keyword)
Ghana, cross-sectoral, stakeholders, peri-urban, planning, water and sanitation provision, urbanization
Nummer
4
Årgång
65
Utgåva
Shallow groundwater is an important factor contributing to the deterioration of the Pharaonic monuments in Egypt. The capillary zone of the soil layers reaches the ground surface, and constant transport of salts and water takes place in an upward direction due to evaporation. The result of this is a concentration of salts in the upper […]
Publiceringsdatum
Författare
Edgar Herbas Campos
Nyckelord (Keyword)
Groundwater, conceptual model, hydrogeology, irrigation, GMS 6.0, World Heritage, Luxor, Egypt.
Nummer
4
Årgång
65
Utgåva
Lake Ringsjön is situated in the south of Sweden, in the county of Skåne. It consists of three shallow lakes in series: Sätoftasjön, Östra Ringsjön and Västra Ringsjön, with the outlet in the river Rönne å. The lake has been eutrophic since the 1960s. One large point-source to the lake is the municipal wastewater treatment […]
Publiceringsdatum
Författare
Hélène Martin-Gousset , Kenneth M Persson and Dilip Roy
Nyckelord (Keyword)
Ringsjön, Nitrogen model, retention time, municipal wastewater treatment
Nummer
4
Årgång
65
Utgåva
In this paper, the investment in new desalination capacity, expressed as daily production capacity, was studiedas a function of oil production and population increase for a large group of countries for the last 25 years. These countries were selected for their large desalination production and Sweden presented as reference. Oil production correlated well with investments […]
Publiceringsdatum
Författare
RAED A.I. BASHITIALSHAAER and KENNETH M PERSSON
Nyckelord (Keyword)
Seawater Desalination and Capacity; Oil Production; Population; Recovery Ratio; Brine Discharge; Salinity
Nummer
1
Årgång
65
Utgåva
The Gulf of Finland is one of the most eutrophicated parts of the Baltic sea. Besides the city of St Petersburg the share of nitrogen and phosphorus from agriculture have been in focus. A new Swedish-Russian long-term cooperation have started in the county of Leningrad. The purpose is among others to establish monitoring stations. These […]
Publiceringsdatum
Författare
Markus Hoffmann , Johannes Deelstra och Niklas Bergman
Nyckelord (Keyword)
monitoring, agriculture, the Baltic Sea, eutrophication, nitrogen leaching, phosporus losses, farming, arable land
Nummer
1
Årgång
65
Utgåva
The deepwater of the water area known as Inre Valdemarsviken, situated on the Swedish east coast, is a recipient of effluent water. Suspicions has arisen concerning bad conditions in the mouth area due to abnormal presence of bacteria in the surface water, overgrown perennial algae and turbid water. This may be effects of effluent water […]
Publiceringsdatum
Författare
Pernilla Johansson
Nyckelord (Keyword)
Effluent water, entrainment, selective withdrawal
Nummer
1
Årgång
65
Utgåva
Bioaugmentation for enhanced wastewater treatment performance depends on survival, maintained activity and retention of the inoculated microorganisms in the reactor. Biofilms could be suitable mediators of bioaugmentation due to the retention of the immobilized cells and the protection offered by the biofilm matrix. The overall objective of this study was to investigate the potential of […]
Publiceringsdatum
Författare
Sofia Andersson, Gunnel Dalhammar, Gunaratna Kuttuva Rajarao
Nyckelord (Keyword)
Biofilm, denitrification, fluorescent in situ hybridisation, wastewater treatment
Nummer
2
Årgång
65
Utgåva
This paper evaluates the accumulation of the heavy metals cadmium, chromium, copper, nickel, lead, zinc and the effect of deicing salt in two Vegetative Filter Strips in an eight years old facility in southern Malmö. The two Vegetative Filter Strips were the road shoulder and the last step in the treatment facility after a swale, […]
Publiceringsdatum
Författare
PETER LINDVALL, VIVEKA LIDSTRÖM och ANN-CHRISTIN SUNDAHL
Nyckelord (Keyword)
Stormwater treatment, Vegetated filter strip, Malmö, accumulation, heavy metals, exchangeable sodium percentage, cation exchange capacity
Nummer
2
Årgång
65
Utgåva
The city Cochabamba in Bolivia faces increasing environmental problems and health risks due to insufficient wastewater treatment in peri-urban areas. This study evaluates the treatment efficiency of a horizontal subsurface flow (HSF) constructed wetland, built by the foundation AGUATUYA, and investigates the applicability of the method in Cochabamba. The wetland reduces BOD5 by 80–97 %, […]
Publiceringsdatum
Författare
Helena Cordesius, Sofia Hedström and Kenneth M Persson
Nyckelord (Keyword)
Cochabamba; Bolivia; constructed wetland; horizontal subsurface flow; wastewater; sewage water; water treatment; reuse of wastewater; minor field study
Nummer
2
Årgång
65
Utgåva
New technologies in the water sector can make treatment processes more efficient at lower total cost and with less environmental impact, but it is often difficult for new technologies to get from research to market. Therefore EU has proposed a number of measures to facilitate uptake of new technologies. One is the implementation of testing […]
Publiceringsdatum
Författare
Uwe Fortkamp, Christian Junestedt
Nyckelord (Keyword)
Water treatment, innovative technologies, independent testing, verification, research to market, environmental technology verification, ETV
Nummer
2
Årgång
65
Utgåva
The development of the ancient water supply of Greece is described in brief and the central causes for why Greece has so many different technical solutions discussed. The probably most important reason to the multitude of technical solutions is that the city-states in general had a far-reaching independence. Thus, many city engineers could develop their […]
Publiceringsdatum
Författare
Kenneth M Persson
Nyckelord (Keyword)
Ancient water supply; Greece; Water resouces management; Aqueducts; Athens
Nummer
2
Årgång
65
Utgåva
Iron is an important nutrient, and is included in e.g. haemoglobin. It is excreted in very small amounts. High intake, mainly from Fe in medicines or supplements, may cause bloody diarrhoea, and later acidosis, liver- and kidney damage and heart failure. Fe from drinking water is infrequently discussed. 1. Cows and calves on a farm […]
Publiceringsdatum
Författare
Ingegerd Rosborg
Nyckelord (Keyword)
drinking water, iron, diarrhoea, horses, cattle, cows, well water, men, hemochromatosis, Crohn’s disease
Nummer
2
Årgång
65
Utgåva
Sustainability reflects one of the major issues for mankind today, and is possibly one of the key factors for a long time survival on planet earth. Sustainability in this paper is discussed from the viewpoint of water protection and especially wastewater treatment. Focus is done with respect to municipal wastewater management. It is acknowledged that […]
Publiceringsdatum
Författare
Stig Morling
Nyckelord (Keyword)
Environmental protection, Sanitation, Empirical knowledge, Sustainability, Wastewater treatment plants
Nummer
3
Årgång
65
Utgåva
Degradation of surface and groundwater quality, caused by spreading of pollutants during exceptional flood events is getting serious concern. The ongoing changes in land use, is leading to a gradual increase of flood prone areas as well as flow volume and velocity. Inundated water breaks loose the surface deposits, soil minerals and transports them downstream […]
Publiceringsdatum
Författare
SACHIDA N. KAPILASHRAMI, KLAS CEDERWALL and ERIK LEVLIN
Nyckelord (Keyword)
Flood events, NPS contaminants, risk assessment, toxicity, pesticide, herbicide and volatile organic compounds.
Nummer
3
Årgång
59
Utgåva
Optimization of coagulation at chemical wastewater treatment plants is becoming more important with the increasing demand for better effluent quality, sustainable utilization of resources and reduced operational cost. Recent advances in on-line instrumentation, modeling technology and computer and telecommunication techniques lead to a possibility in constructing a more robust model for coagulant dosage control based […]
Publiceringsdatum
Författare
L. LU, H. RATNAWEERA and O. LINDHOLM
Nyckelord (Keyword)
Coagulation, model, wastewater treatment, real time control.
Nummer
4
Årgång
59
Utgåva
This article reviews the worldwide experiences on possibilities of using constructed wetlands for landfill leachate treatment. On-site ”high-tech” leachate treatment systems are often avoided due to large construction and operating costs. Two questions that are crucial for the success of constructed wetlands in future landfill leachate treatment are addressed—(i) does nitrification/denitrification occur and can it […]
Publiceringsdatum
Författare
AGNIESZKA KIETLINSKA
Nyckelord (Keyword)
ammonium-nitrogen; constructed wetlands; denitrification; ecotechnology; landfill leachate; removal processes; treatment.
Nummer
4
Årgång
59
Utgåva
Water management, monitoring and regulation, as well as research and education are traditionally fragmented among many different sectors, authorities, and scientific disciplines. We present and describe here a basic methodology for integrated water management, in terms of a concrete flowchart that: (a) is generally applicable to and thereby integrates different types of decision problems, including […]
Publiceringsdatum
Författare
GEORGIA DESTOUNI, FREDRIK HANNERZ, VLADIMIR CVETKOVIC, BJÖRN FROSTELL och BENGT HULTMAN
Nyckelord (Keyword)
River basin management. Integrated Water Resources Management, Water Framework Directive, management plan, action plan, monitoring, water quality, water quantity.
Nummer
4
Årgång
59
Utgåva
This paper summarizes the state-of-the-art with respect to wetlands for nutrient removal and biodiversity enhancement, as expressed at a research workshop in December 2002. In the end of 2002, 260 and 884 wetlands had been constructed in Sweden with subsidies from LIP and the European Union, respectively. Most frequently, the aims were to remove nutrients […]
Publiceringsdatum
Författare
TONDERSKI, K. S., SVENSSON, J. M., EKSTAM, B., ERIKSSON, P. FLEISCHER, S., HERRMANN, ]., SAHLEN, G. och WEISNER, S. E. B.
Nyckelord (Keyword)
Biologisk mångfald, denitrifikarion, hydraulisk belastning, jordbrukslandskap, kväve, fosfor, sedimentation, våtmarker, vegetation
Nummer
4
Årgång
59
Utgåva
Many organotin compounds are toxic, thus their occurrence in the environment is of considerable concern, and several of these substances are regarded as priority pollutants that require further investigation. Organotins are used primarily as heat stabilisers in PVC plastic, and they are therefore found in landfills in which discarded PVC products have been deposited. In […]
Publiceringsdatum
Författare
ANNIKA FREDRIKSSON. GUSTAV NESTOR and BO H. SVENSSON
Nyckelord (Keyword)
biodegradarion, 2-ethylhexanoic acid, landfill microorganisms, inhibition of methane formation, methyl tins, PVC, tin stabilisers, volatile fatty acids.
Nummer
4
Årgång
59
Utgåva
The ability of conventional equipment intended for removing Fe and Mn to also remove 222Rn, 226Ra, 234,238U, 210Pb and 210Po from private well water was examined at 12 houses in Finland. The operational principles of the equipment were based on aeration and filtration, ion exchange or manganese greensand filtration. The results indicated that 222Rn removal […]
Publiceringsdatum
Författare
Pia Vesterbacka and Laina Salonen
Nyckelord (Keyword)
natural radionuclides, drinking water treatment, Fe and Mn removal
Nummer
3
Årgång
64
Utgåva
The EU framework directive states that all water bodies within the union should achieve good ecological status 2015. Reducing discharges from on-site wastewater systems is identified as an important means to ameliorate the quality of Swedish waters. This article presents a tool, VeVa River Basin, developed to assess the environmental impact from sewage systems in […]
Publiceringsdatum
Författare
Caroline Holm, Erik Kärrman, Åsa Erlandsson,
Mats Johansson and Anders Larsson
Nyckelord (Keyword)
Environmental systems analysis; on-site systems; wastewater management; wastewater treatment; VeVa
Nummer
3
Årgång
64
Utgåva
The capacity for biofilm attachment and activity of 20 low cost materials with little environmental impact (leftovers, byproducts or reusable waste materials) were investigated using two denitrifying biomarker organisms, Comamonas denitrificans 110 and Brachymonas denitrificans B79, and the non-denitrifying strain E. coli K12. The amount of attached biofilm was indirectly measured by analyzing the denitrification […]
Publiceringsdatum
Författare
Sofia Andersson, Mirja Nilsson, Gunnel Dalhammar and Gunaratna Kuttuva Rajara
Nyckelord (Keyword)
Biofilm formation; Brachymonas denitrificans; Comamonas denitrificans; carrier material, denitrification, Kaldnes K1, LECA, pumice, wood chips
Nummer
3
Årgång
64
Utgåva
The Oxidation Ditch has played a very important role as a foregoer for a number of low load activated sludge systems in the water industry. Today different models are found around the world. The ditch system developed in the late 1950’s originated in the Netherlands. Early Swedish research and development work took place in the […]
Publiceringsdatum
Författare
Stig Morling
Nyckelord (Keyword)
Oxidation Ditch, effluent standards, P-removal, nitrification
Nummer
3
Årgång
64
Utgåva
Well waters and women’s hair from acid, and an alkaline area, were analysed on about 40 elements and ions in 1997. The alkaline waters and hair had significantly higher concentrations of e.g. Ca, Mo and Se. In april 2006, 30 women from the acid area, northern Scania, southern Småland and southern Älvsborg counties, and 30 […]
Publiceringsdatum
Författare
Ingegerd Rosborg
Nyckelord (Keyword)
vegetables, minerals, drinking water, acid, alkaline, hair nutrient analysis, acidification, bedrock, limestone, primary rock
Nummer
3
Årgång
64
Utgåva
This paper presents how super critical water oxidation (SCWO) performs on the iron rich sludge from the drinking water treatment plant Ringsjöverket. The pilot-test shows that the SCWO-technique is capable of treating the sludge from Ringsjöverket. During the pilot- test all organic material were oxidized while the rest precipitated as ferric oxide crystals. Chromium and […]
Publiceringsdatum
Författare
Jakob Schuster and Kenneth M Persson
Nyckelord (Keyword)
SCWO, Supercritical oxidation, Sydvatten, Waterworks sludge
Nummer
3
Årgång
64
Utgåva
The focus of this work is on general patterns in uncertainty as well as temporal and spatial variability in key water variables in coastal science and management. These patterns are essential since they regulate how many samples must be taken to get reliable mean or median values characterising coastal water quality and which variables are […]
Publiceringsdatum
Författare
Andreas C. Bryhn, Lars Håkanson and Jenny M. Eklund
Nyckelord (Keyword)
Variability, uncertainty, water variables, CV, predictive power, coastal areas, management
Nummer
4
Årgång
64
Utgåva
This paper evaluates the Baltic Sea Action Plan (BSAP) proposed by Helcom (Helsinki Commission) to combat eutrophication in the Baltic Sea with respect to cost effectiveness and fairness. The background is the documented needs of both these factors for truthful implementation of international agreements, such as the ministerial adoption of BSAP in autumn 2007. The […]
Publiceringsdatum
Författare
Ing-Marie Gren
Nyckelord (Keyword)
eutrophication, Baltic Sea, Helcom BSAP, cost effectiveness, fairness, evaluation
Nummer
4
Årgång
64
Utgåva
The European landfill directive increases demands on landfills. The amount of organic matter being landfilled is restricted and landfills should be as dry as possible. The consequences of these changes are not yet fully understood. In this study the first landfill in Sweden to be constructed according to the directive, Fläskebo, has served as an […]
Publiceringsdatum
Författare
Hanna Modin, Martijn van Praagh, Kenneth M Persson
Nyckelord (Keyword)
Landfill monitoring, leachate analysis, multivariate data analysis, PCA, CCA, Landfill Directive, geochemical modelling
Nummer
4
Årgång
64
Utgåva
Short-term intensive storms of duration up to an hour the years 1980–2007 from rain gauges in Malmö have been analyzed to find intensities of long return periods. Non-dependent observations from different stations have been combined into a series to which probability functions have been adjusted. The extreme events have been investigated individually. The reliability of […]
Publiceringsdatum
Författare
Lars Bengtsson och Stefan Milotti
Nyckelord (Keyword)
short-term rainfall, design rain, extreme events, extreme value distribution, trends, measurement reliability, independent observations
Nummer
4
Årgång
64
Utgåva
In this study 136 wells (88 shallow and 48 deep) from rural areas in Western and Eastern Finland were analyzed during the years 2005 and 2006. The objectives of this study were to assess the general quality of the wells based on conventional indicators and novel organic matter analyses with the aid of High Performance […]
Publiceringsdatum
Författare
HILDA MARTA SZABO, OUTI KAARELA and TUULA TUHKANEN
Nyckelord (Keyword)
well water, NOM, groundwater, leaching, wastewater
Nummer
1
Årgång
65
Utgåva
Municipal secondary wastewater effluent was applied to plots, 900 m2 each, on a middle-class farming land planted with willows (primarily clones from Salix viminalis} according to the short-rotation energy forestry (SREF) concept in Sweden. Wastewater was applied at rates of 2, 4, 6, 8, 10 and 12 mm/d, respectively, throughout the growth period (May-October) during […]
Publiceringsdatum
Författare
KENTH HASSELGREN
Nyckelord (Keyword)
land treatment, metals, municipal wastewater, nutrients, Salix, short-rotation energy forestry, willows
Nummer
4
Årgång
58
Utgåva
The runoff from an extensive green roof in Malmö was measured over more than a year. The roof, which is 4 m long sloping 2.5 %, is covered by 3-4 cm soil substrate with sedum vegetation. About 10 mm rain is required to generate runoff. The monthly and annual water balance of a green roof […]
Publiceringsdatum
Författare
LARS BENGTSSON
Nyckelord (Keyword)
sedum vegetation, extensive green roof, water balance, runoff, storm water
Nummer
4
Årgång
58
Utgåva
This article reports the work done in the doctoral project ”Productive treatment of wastewater in cold climate with microalgae”, and concludes that microalgae may improve wastewater treatment in ponds in cold climate, from a treatment perspective as well as a sustainability perspective. Part of this work has previous been published in the licentiate thesis 2002: […]
Publiceringsdatum
Författare
ERIK GRÖNLUND, STEFAN FALK och JÖRGEN HANAEUS
Nyckelord (Keyword)
wastewater, microalgae, cold climate, sustainabilitv, products, growth, emergy, socio-ecological principles
Nummer
4
Årgång
58
Utgåva
Increased nutrient load often causes algal blooms. An algal bloom lowers the water quality which is a problem in many fresh water catchments. Today, we have too little information about how the nutrient supply influences the algal composition. With a new method (still under development), called ”delayed fluorescence (DF) excitation spectroscopy”, the goal is to […]
Publiceringsdatum
Författare
KARIN SANDBERG
Nyckelord (Keyword)
fluorescence, delayed fluorescence (DF) , enclosures, algal composition, excitation spectroscopy, nutrient load, phytoplankton, algal bloom.
Nummer
4
Årgång
58
Utgåva
Water problems are becoming more and more complex to solve in a sustainable manner. The reason for this is a rather radical change of focus from engineering solutions to a more interdisciplinary hydro-ecological and socioeconomic perspective during the latest decades. At the same time many occurring water problems are changing character from the local to […]
Publiceringsdatum
Författare
R. BERNDTSSON och G. LINDH
Nyckelord (Keyword)
education, water specialist, sustainability.
Nummer
4
Årgång
58
Utgåva
FOSFORMODELLER FÖR FISKODLING I SÖTVATTEN / Phosphorus mass balance models for freshwater fish farms
Existing mass balance models for phosphorus were tested for fish farm emissions in eight Northern and Central European lakes. These traditional models overestimated the total phosphorus concentration in these lakes by on average a factor of two. Data from the eight lakes were therefore used to calibrate emission specific models based on the Vollenweider and […]
Publiceringsdatum
Författare
TORBJÖRN JOHANSSON och LENNART NORDVARG
Nyckelord (Keyword)
Aquaculture, freshwater, phosphorus, models
Nummer
1
Årgång
59
Utgåva
This is an evaluation of a new method, the denitrification wall, with the purpose of diminishing nutrient content in drainage water from agriculture land use. The denitrification wall consists of a trench filled with soil mixed with sawdust that intersects the drainage pipes.. The concept was applied in the drainage area of River Råån in […]
Publiceringsdatum
Författare
PÄR PERSSON, TORBJÖRN DAVIDSSON och JONAS SVENSSON
Nyckelord (Keyword)
denitrification wall, sawdust, drainage water, nutrient reduction.
Nummer
1
Årgång
59
Utgåva
REMOVAL OF HEAVY METALS IN WATER BY PINE BARK / Reduktion av metaller från vatten genom furubarkflis
Metals that are dissolved in storm water can be removed by filtrating water through specially constructed filter systems. Pine bark is an interesting material for this purpose, but it needs further investigations regarding its removal efficiency of metals. This paper presents a laboratory study where pine bark was tested to evaluate its efficiency in reducing […]
Publiceringsdatum
Författare
CARINA FÄRM
Nyckelord (Keyword)
Filtration, heavy metals, model, pine bark, run off, sorption isotherms, storm water
Nummer
1
Årgång
59
Utgåva
Liquids obtained during handling of solid wastes may contain a high concentration of nitrogen (ten times higher than the nitrogen concentration in municipal wastewater). At the same time these liquids contain too low concentration of biodegradable organic material for nitrogen to be removed by conventional denitrification. This paper proposes a new treatment system for leachates […]
Publiceringsdatum
Författare
ALEKSANDRA NIKOLIC and BENGT HULTMAN
Nyckelord (Keyword)
Chemical denitrification; leachate; nitritation; concentration; nitrogen removal; urea.
Nummer
1
Årgång
59
Utgåva
The effect of fixed media biofilter on the removal of colour was studied in a pilot scale column at the Waterworks in Oskarshamn. The process was applied on a surface raw water with a very high colour content. The results indicated the potential of colour removal and the simultaneous effect on iron and manganese. The […]
Publiceringsdatum
Författare
HUSAM S.JABUR, CHARLOTTA KARLSSON och JONAS MÅRTENSSON
Nyckelord (Keyword)
Pre-Treatment, Biofilter, colour, manganese, iron, bacteria.
Nummer
1
Årgång
59
Utgåva
A selection of 14 Swedish municipal master plans have been compared with the requirements of future river basin plans, as prescribed in the Water Framework Directive. The municipal master plans can be considered as the main planning documents to provide guidance for decision-making on water use in Sweden. Thus, they represent the long-term plans for […]
Publiceringsdatum
Författare
BEATRICE HEDELIN and JAN-ERIK GUSTAFSSON
Nyckelord (Keyword)
Water Framework Directive, Sweden, Implementation, river basin plan, municipal master plan.
Nummer
2
Årgång
59
Utgåva
The high cost of water treatment has rendered provision of good quality water difficult in the developing world. More than 1 billion people are believed to have no access to safe drinking water. Costs of chemicals, filter media and power are the most important parameters that have to be considered in providing affordable treatment. In […]
Publiceringsdatum
Författare
KEBREAB GHEBREMICHAEL and BENGT HULTMAN
Nyckelord (Keyword)
Asmara, natural materials, Moringa Oleifera, pumice, water supply
Nummer
2
Årgång
59
Utgåva
Chemical denitrification has been proposed (Nikolic and Hultman, 2003) as the second part in a new treatment system for landfill leachates, where ammonium or urea is oxidized with nitrite to yield nitrogen gas and water. Concentrated aqueous solutions of ammonium nitrite or urea nitrite are unstable. One of possible methods to concentrate solution and in […]
Publiceringsdatum
Författare
ALEKSANDRA NIKOLIC and BENGT HULTMAN
Nyckelord (Keyword)
Chemical denitrification; freezing; leachate: urea; nitrogen removal; conductivity
Nummer
2
Årgång
59
Utgåva
In the newly built urban area Västra hamnen, in Malmö, Sweden, a new system for source-sorting of organic municipal waste, was constructed. The organic waste is disposed through a kitchen disposer, and is then led into a separate pipe, passes a cutting pump and is separated in a settling tank in the area. The material […]
Publiceringsdatum
Författare
CHARLOTTA LÖVSTEDT, PETER NORLANDER, ÅSA SVÄRD och CHRISTOPHER GRUVBERGER
Nyckelord (Keyword)
kitchen disposer, anaerobic digestion, biogas, organic waste, waste separation.
Nummer
2
Årgång
59
Utgåva
The water supply system in Sweden consists mainly of large waterworks supplying most of the inhabitants with drinking water. This makes it an interesting target for terrorism. Along the water’s way from source to subscriber it passes a lot of dangerous spots where an attack is possible. The biological and chemical threats to the water […]
Publiceringsdatum
Författare
ANNA ÅKESSON
Nyckelord (Keyword)
Water supply, terrorism, biochemical threats, security, Sweden.
Nummer
2
Årgång
59
Utgåva
According to stipulations in the Water Framework Directive economic analyses of water use in different sectors are required. The aim is to assess the possibilities to reach the targets for water quality by 2015 at reasonable costs, and to develop cost-effective programs for restoration and management that will be part of the management plans in […]
Publiceringsdatum
Författare
MARIANNE LÖWGREN
Nyckelord (Keyword)
Motala Ströms avrinningsområde. ekonomisk värdering, miljökostnader. vattentjänster
Nummer
3
Årgång
59
Utgåva
Different types of phosphorus fertilizer were evaluated in a three-year field experiment with oars and barley in mid-western Sweden. The treatments were, except a control, mineral fertilizer (calcium phosphate): ash; sewage sludge precipitated with iron, aluminium or lime; and biologically treated sewage sludge. To ensure that only the effect of the phosphorus source was evaluated, […]
Publiceringsdatum
Författare
LINDERHOLM. K., PALM. O., PERSSON. P.
Nyckelord (Keyword)
recycling, sewage sludge, precipitation chemicals, field experiment, phosphorus.
Nummer
3
Årgång
59
Utgåva
A pot experiment was performed to study the impact of phosphorus in soil on the development of Arbuscular Mycorrhiza (AM) on ryegrass. The soil used in the experiment was fertilized with different phosphorus fertilizers three years before this experiment. Fertilizer-P (easily soluble calcium phosphate) added as a storage supply (45 kg P/ha) affected AM negatively […]
Publiceringsdatum
Författare
LINDERHOLM K., PALM O. och PERSSON P.
Nyckelord (Keyword)
phosphorus, pot experiment, Arbuscular Mycorrhiza
Nummer
3
Årgång
59
Utgåva
The university of Oulu, Green Rock Ltd and Kemira Plc carried out a joint research on the suitability of Aqua stone for retaining phosphorus in septic tanks. The research period was from November 7, 2000 to March 28, 2001. There were altogether six research sites in the municipalities of Haukipudas and Kempele in Northern Finland. […]
Publiceringsdatum
Författare
JYRKI RÖPELINEN, ESKO LAKSO and JARMO SALLANKO
Nyckelord (Keyword)
phosphorus removal, septic tanks
Nummer
3
Årgång
59
Utgåva
A new treatment system has been proposed to remove nitrogen from landfill leachates with the combination of partial nitritation (biological oxidation of ammonium to nitrite) followed by chemical denitrification with oxidation of remaining ammonium with nitrite to nitrogen gas (Nikolic and Hultman, 2003 a). Chemical denitrification is much dependent on high concentrations of ammonium and […]
Publiceringsdatum
Författare
ALEKSANDRA NIKOLIC and BENGT HULTMAN
Nyckelord (Keyword)
Chemical denitrification: conductivity; evaporation/drying; leachate; nitrogen removal.
Nummer
3
Årgång
59
Utgåva
Waste deposits generate polluted water, leachate, which contains metal ions. Leachate is often led to waste water purifying plants. The metals sediment and end up in the digested sludge, which often is taken back to the waste deposit. This results in a negative eco-cycle. Metal ions in solution can be captured by ion-exchangers, but commercially […]
Publiceringsdatum
Författare
JOHAN NILVEBRANT, MAGNUS ISACSON and RASMUS ÖMAN
Nyckelord (Keyword)
leachate, metal ions, wood, bark. lignin
Nummer
4
Årgång
57
Utgåva
A Danish and a Swedish study of nitrification inhibition are compared. A considerably larger percentage of’ the Danish treatment plants received wastewaters strongly inhibitory to nitrification compared to the Swedish treatment plants. More than 20 % inhibition in a 50% dilution of the samples was noted for about a fourth of the investigated Danish wastewaters. […]
Publiceringsdatum
Författare
KARIN JÖNSSON, KARIN DAHLGREN LAURSEN och JES LACOUR JANSEN
Nyckelord (Keyword)
Denmark, inhibition, nitrification, screening method, sources, Sweden.
Nummer
4
Årgång
57
Utgåva
Only about 6% of the urban population in China is connected to wastewater treatment plants. However, an ambitious plan for increasing this figure exists. A large portion of the existing treatment plants operates at a non-satisfactory efficiency and the reason is inadequate management and lack of operation knowledge and experiences. With a fast increasing number […]
Publiceringsdatum
Författare
ERIK SÄRNER
Nyckelord (Keyword)
wastewater treatment, training, education
Nummer
1
Årgång
58
Utgåva
A pilot study of local initiatives for a river basin in accordance with the European Water Framework Directive is being carried out in central Sweden. The catchment recipient suffers from eutrophication and Cyanobacteria-charged turbid water. Stakeholder involvement and several measures are proposed to enable the lake to attain a good chemical and ecological status. To […]
Publiceringsdatum
Författare
BARBRO ULEN, STEFAN LÖFGREN and TERESA KALISKY
Nyckelord (Keyword)
Water Framework Directive, eutrophication, phosphorus concentrations, phosphorus load, catchment management.
Nummer
1
Årgång
58
Utgåva
During the autumn and winter of 2000/2001, excessive rainfall occurred over large parts of the Lake Vänern drainage basin and caused floods especially in Lake Glafsfjorden. As a consequence, it was decided within the Swedish Regional Climate Modelling Programme (SWECLIM) to produce water resources scenarios for the Lake Vänern region. The scenarios were based on […]
Publiceringsdatum
Författare
JOHAN ANDREASSON, MARIE GARDELIN and STEN BERGSTRÖM
Nyckelord (Keyword)
Climate change impact, hydrological modelling, HBV, SWECLIM, GCM, RCA, frequency analysis, water levels.
Nummer
1
Årgång
58
Utgåva
This paper analyses the history of recycling from the mid-19th century to the present ”recycling society”. New chemical and sanitary theories made the recycling idea boom in the 1850s and during the second half of the century major tests were made with closets separating urine and faeces, factories for extracted faeces and sewage systems for […]
Publiceringsdatum
Författare
ERLAND MÅRALD OCH TORSTEN MODIG
Nyckelord (Keyword)
History of recycling, urban and rural areas, sewage systems, path-dependency, recycling technology
Nummer
1
Årgång
58
Utgåva
Research on sustainable management of the coastal zone is motivated by the fierce competition for natural resources between different categories of users along the coast. Knowledge-based management will be able to base its decision-making on information representing the complex nature of the coast. The research carried out in the research programme Sustainable Coastal Zone Management […]
Publiceringsdatum
Författare
ANDERS CARLBERG
Nyckelord (Keyword)
coastal zone, integrated management; coastal research; integrated coastal zone management (ICZM): MISTRA; Water Framework Directive.
Nummer
1
Årgång
58
Utgåva
The monitoring programmes for Swedish waste receiving waters are designed according to conditions existing 40-50 years ago. Today there is a strong need to renew these programmes. They don’t include information about changes in primary pollution load, which means that cause and effect can’t be studied. In addition, a lot of unnecessary monitoring is performed […]
Publiceringsdatum
Författare
CURT FORSBERG och MATS WALLIN
Nyckelord (Keyword)
Waste receiving waters, water quality, monitoring programmes, control of both land and water, cause and effect, renewal of the programmes.
Nummer
2
Årgång
58
Utgåva
Residents’ daily routines and the construction of residential buildings are important ingredients in a strive towards a sustainable society. City councils, building companies, and infrastructure service providers develop ways to conserve evergy and water. However, increasingly recognized is the importance of the residents’ willingness to contribute to achieving the environmental goals. Here is presented an […]
Publiceringsdatum
Författare
JAN-OLOF DRANGERToch HELENA KRANTZ
Nyckelord (Keyword)
sustainability, environmental goals, environmental attitudes, infrastructural services, Hammarby Sjöstad.
Nummer
2
Årgång
58
Utgåva
A theoretical and experimental study has been performed to give a basis for recovery of phosphorus and Other products from sewage sludge and ash with application to Henriksdal wastewater treatment plant (Hultman et al., 2002). Special attention is given in this article on the use of supercritical water oxidation followed by phosphorus recovery (Aqua Reci). […]
Publiceringsdatum
Författare
KRISTINA STARK
Nyckelord (Keyword)
Phosphorus recovery,sludge, supercritical water oxidation.
Nummer
2
Årgång
58
Utgåva
Some of the brewing industry’s special quality demands – in addition to current legislation – on the water raw material are briefly discussed. To avoid oxidative quality deterioration of the products, the content of oxygen as well as compounds capable of catalysing oxidation must be kept at a very low level. Similarly, residual chlorine must […]
Publiceringsdatum
Författare
GÖRAN HÄRNULV
Nyckelord (Keyword)
water quality; quality demands; brewing industry; beer; soft drinks; bottled waters.
Nummer
2
Årgång
58
Utgåva
Since the 1950s, different water management associations characterised by voluntariness are taking part in the Swedish water administration. Certain conditions prevail regarding the co-ordinated recipient monitoring and due to the Act on water associations. The act strictly regulates the purpose with this kind of association; to promote appropriate utilisation of watercourses. Those actors given prior […]
Publiceringsdatum
Författare
JENNY GRÖNWALL
Nyckelord (Keyword)
vattenförbund. vatten(vårds)förbund, ramdirektiv vatten, vattenadministrarion, avrinningsområde, public participation.
Nummer
2
Årgång
58
Utgåva
The saturator system is the most cost consuming part in DAF operation and optimization of the used methods is of great economical interest. An ejector-based system for use in a pilot plant was evaluated with novel air collecting methods. Three ejectors with increasing size were examined and a relation between ejector water velocity and a […]
Publiceringsdatum
Författare
MÅNS LUNDH, LENNART JÖNSSON and JAN DAHLQUIST
Nyckelord (Keyword)
Water and Wastewater Treatment; Separation; Dissolved Air Flotation; Saturation Efficiency; Precipitation Efficiency; Air Content Measurements.
Nummer
2
Årgång
58
Utgåva
The removal efficiency of iron from ground-water for drinking water production is related to iron physico-chemical forms (species). An ion-exchange method was suggested for iron speciation analysis in groundwater. This method is based on the sorption of negatively charged iron species, mainly organically bound iron, on to DEAE cellulose anion-exchange resin, and positively charged species, […]
Publiceringsdatum
Författare
TALIS JUHNA, BAIBA GULBE, MARIS KLAVINS
Nyckelord (Keyword)
iron-humic complexes, speciation analysis, groundwater.
Nummer
3
Årgång
58
Utgåva
A monitoring program for stormwater quality from the Malmö-Sturup airport was ratified by the regional authority in 1989. The dominating source of water pollution from the airport is the chemicals monopropy-lenglycol, urea and potassium acetate, used during winter season for deicing of the aircraft’s and runways. The monitoring programme included 5 sampling stations with monthly […]
Publiceringsdatum
Författare
CURT FORSBERG
Nyckelord (Keyword)
Airport, deicing, storm water, monitoring programme, evaluation, new modified programme.
Nummer
3
Årgång
58
Utgåva
The concept of coliforms as faecal pollution indicator organisms have been used to evaluate the water quality and the efficiency of the water treatment for about 100 years with varying degrees of success. Water borne diseases are caused by wider sorts of micro-organisms. The importance of the viruses and protozoa are increasing. These micro-organisms have […]
Publiceringsdatum
Författare
HUSAM S. JABUR, JONAS MÅRTENSSON, KENNETH M. PERSSON
Nyckelord (Keyword)
indicator organisms, water quality, algae, bacteria, virus
Nummer
3
Årgång
58
Utgåva
Increased demand for storm water treatment has created development in filtration technologies for storm water. Manufacturers are using different filtration facilities and different filter materials. Therefore there is a need – from manufacturers, universities and government organisations – to put together current knowledge and to clarify important aspects concerning constructed filter systems. The first part […]
Publiceringsdatum
Författare
CARINA FÄRM
Nyckelord (Keyword)
Filtration, gully-pot, heavy metals, pine bark, road runoff, sorbent, sorption, storm water.
Nummer
3
Årgång
58
Utgåva
Acidity and excess amount of iron and manganese are the most common problems in Finnish groundwater demanding water treatment measures. Also, groundwater in Finland is usually soft. Biological methods, such as a combination of dry filtration and slow filtration, are commonly used. This method removes iron and manganese from water and increases the pH-level somewhat, […]
Publiceringsdatum
Författare
JARMO SALLANKO, JYRKI RÖPELINEN, RIITTA KAMULA
Nyckelord (Keyword)
water treatment, groundwater treatment, calcium carbonate filter, backwash, iron, limestone
Nummer
3
Årgång
58
Utgåva
Public water and sanitation service (the VA service) have since the end of the 19th century been managed by municipalities in Sweden. However, as a part of the influence from the globalisation discussion this model has been challenged in recent years. For instance, in 2000 the German-based Eon company bought the assets of the Norrköping […]
Publiceringsdatum
Författare
JAN-ERIK GUSTAFSSON
Nyckelord (Keyword)
Water supply, sanitation, deregulation, privatisation, Sweden
Nummer
3
Årgång
58
Utgåva
The occurrence of Giardia and Cryptosporidium in Swedish Wastewater treatment Plants (WWTP) has previously not been investigated. Giardia cysts were present in the untreated wastewater at every sampling occasion at all test sites in densities between 24—160 cysts/L, but only twice in the treated wastewater and in lower densities. Cryptosporidium oocysts were detected in 67 […]
Publiceringsdatum
Författare
JAKOB OTTOSON
Nyckelord (Keyword)
Giardia, Cryptosporidium, wastewater, treatment, microbial risk assessment.
Nummer
4
Årgång
57
Utgåva
So far, the processes behind the eutrophication of coastal waters are poorly understood. As a consequence of this, efforts to counteract this phenomenon have failed. In this study, ecological valuations are used, in comparison with nutrient utilization, in different types of lakes and watercourses in parts of the drainage basin of the River Göta älv, […]
Publiceringsdatum
Författare
OLOF PEHRSSON
Nyckelord (Keyword)
Eutrophication, oligotrophication, nitrogen, phosphorus, N/P-ratio, lakes, water courses, estuary, sea.
Nummer
1
Årgång
60
Utgåva
The purpose of this project was to develop non-chemical and energy efficient alternatives to chlorination and traditional boiling as drinking-water disinfection methods in emergency situations. The project was started with an investigation of methods in use today and possible alternatives. Two alternative methods that seemed to be promising were chosen – the first method is […]
Publiceringsdatum
Författare
EVA HÅKANSSON
Nyckelord (Keyword)
drinking water, emergency, disinfection
Nummer
1
Årgång
57
Utgåva
Waste-water could be used for forest irrigation as a method for utilising the resources in the water. Forest irrigation systems are rare in Sweden; however, there are some examples in both the north and the south of the country. If irrigation is to be used as a whole-year system, storage of the wastewater due to […]
Publiceringsdatum
Författare
ERICA JOHANSSON
Nyckelord (Keyword)
avloppsvatten, lagring, lagringsbchov, skogsbevattning, kväve, fosfor, bakterier.
Nummer
1
Årgång
57
Utgåva
A Nordic specialist workshop based on a report on Chlorination of drinking water was organised to summarise practical experience from the Nordic countries and to discuss the chlorination strategies for the future. The workshop discussed the following questions: 1) Is it possible to optimise the chlorination process with respect to disinfection effect and the formation […]
Publiceringsdatum
Författare
VIDAR LUND and TRULS KROGH
Nyckelord (Keyword)
chlorination, disinfection, drinking water works, water treatment, Nordic workshop
Nummer
1
Årgång
57
Utgåva
In Finland approximately one third of the total area of lakes is regulated, i.e. 11 000 km2. A large amount of research and development has been conducted on the regulation of watercourses during the last 15 years. Extensive studies have been undertaken in a number of large waterways to assess the ecological, social and economic […]
Publiceringsdatum
Författare
MIKA MARTTUNEN, SEPPO HELLSTEN AND ANTTON KETO
Nyckelord (Keyword)
regulated lakes, littoral zone, impact assessment. Water Framework Directive, sustainable development, Water Act, Finland.
Nummer
1
Årgång
57
Utgåva
The rain statistics used in designing storm sewers in Malmö today does not include data of the last decades. A new evaluation of rainfall data from the last twenty years in Malmö has been made and new intensity-duration-frequency curves have been created. A comparison with earlier statistics shows large discrepancies. The reason for these is […]
Publiceringsdatum
Författare
OLA JONASSON
Nyckelord (Keyword)
rain, rain statistics, intensity-duration-frequency curves
Nummer
1
Årgång
57
Utgåva
Pollution of land and water resources from agricultural production have become a major concern inside most member countries of the European Union (EU). This is basically due to concentrations of farm units, specialization and intensification of the production processes. The new EU Water Framework Directive gives possibilities to introduce environmental charges as a measure to […]
Publiceringsdatum
Författare
JAN-ERIK GUSTAFSSON
Nyckelord (Keyword)
Environmental charges, EU Water Framework Directive. France. Sustainable agriculture.
Nummer
1
Årgång
57
Utgåva
Three Swedish pilot projects have been carried out as part of the Technology- Validation Project (TVP) ”Integrated Wastewater” (1997-2000), supported by the European Commission. The overall objective of the TVP project was to develop and validate an integrated methodological and technological framework for the pollution impact analyses of complete urban Wastewater systems on the receiving […]
Publiceringsdatum
Författare
CLAES HERNEBRING
Nyckelord (Keyword)
combined sewer overflow, pollution transport, real time control, sediment transport, sewer systems, water quality, Wastewater treatment plant.
Nummer
2
Årgång
57
Utgåva
Demonstration studies were accomplished in the cities of Helsingborg, Halmstad and Sundsvall as part of the Technology Validation Project (TVP) ”Integrated Wastewater” (1997-2000). All three projects were focused on the analyses of the interaction between the sewer system and the wastewater treatment plant under variable operational conditions, created by the application of real-time control (RTC) […]
Publiceringsdatum
Författare
CLAES HERNEBRING
Nyckelord (Keyword)
combined sewer overflow, integrated modelling, pollution transport, real time control, sediment transport, sewer systems, water quality, wastewater treatment plant.
Nummer
2
Årgång
57
Utgåva
This paper is based on a literature survey concerning current regulations and general practices of sludge use and disposal in the United States, European Union (in particular Sweden) and Chile. Almost all regulations analysed in this paper require relatively similar hygienisation procedures. Besides being based on the hygienisation method applied, some restrictions are related to […]
Publiceringsdatum
Författare
RAMIREZ, J. I., FROSTELL, B
Nyckelord (Keyword)
sludge management, risk assessment, hygienisation, heavy metals content, sustainable development.
Nummer
2
Årgång
57
Utgåva
The following article is a literature review on possibilities of microalgal improvement of wastewater treatment in oxidation ponds in cold climate. Furthermore the paper covers the possible commercial microalgal products that can be produced using the nutrient resource in the wastewater. Very few investigations have been performed in cold climate. There is evidence that microalgal […]
Publiceringsdatum
Författare
ERIK GRÖNLUND, STEFAN FALK, and JÖRGEN HANAEUS
Nyckelord (Keyword)
microalgae. wastewater treatment, cold climate, low temperature, products, ponds, HROP.
Nummer
2
Årgång
57
Utgåva
Redox sensors have been in use at the wastewater treatment plants in Odense, Denmark since 1990 Starting in April 2000 at the Northeast WWTP the signals from ammonium and redox sensors have been employed for the automatic control of the nitrogen removal process. This resulted in a reduction of the effluent total nitrogen concentration from […]
Publiceringsdatum
Författare
DAVID CECIL
Nyckelord (Keyword)
wastewater treatment, nitrogen removal, redox sensor, ammonium sensor.
Nummer
2
Årgång
57
Utgåva
The redox condition is an important factor controlling e.g. the mobility of compounds in groundwater. Reliable measurements of redox potentials in water are problematic to perform for a number of reasons. A fundamental reason is that natural waters are seldom, if ever, in a state of redox equilibrium. Each redox couple has its own potential […]
Publiceringsdatum
Författare
PÄR-ERIK BACK
Nyckelord (Keyword)
redox potential, groundwater, measurement error.
Nummer
2
Årgång
57
Utgåva
This article explores the origins of our ”piped society”, from the point of view of water and wastewater technologies. Modern water and sewer systems proliferated in Europe in the late 19th century, and the aim of article is to investigate into the reasons for the rapid spread of these urban sanitary technologies, and especially the […]
Publiceringsdatum
Författare
JONAS HALLSTRÖM
Nyckelord (Keyword)
water supply, sewerage, technology, public health, sanitation, ideology, history, Europe, Sweden.
Nummer
3
Årgång
57
Utgåva
Chemical composition of surface waters (lakes and rivers) of Latvia has been studied. The relationship between water composition, formation factors and human impact has been compared. Aquatic chemistry has been found to be controlled both by land-use pattern, human impact and hydrological factors, but in varying: extent for different water bodies. The possible sources of […]
Publiceringsdatum
Författare
MARIS KLAVINS and VALERY RODINOV
Nyckelord (Keyword)
aquatic chemistry, Latvia, weathering, pollution.
Nummer
3
Årgång
57
Utgåva
A study concerning recovery of phosphorus from sludges and ashes has been performed as a cooperation project between Stockholm Water Co and the division of Water Resources Engineering at The Royal Institute of Technology. A model for calculation of the chemical demands for recovery of phosphorus using the commercial systems KREPRO, Cambi/KREPRO and BioCon has […]
Publiceringsdatum
Författare
KRISTINA STARK, BENGT HULTMAN, AGNES MOSSAKOWSKA och ERIK LEVLIN
Nyckelord (Keyword)
chemical precipitation, phosphorus recovery, sludge, sludge fractionation.
Nummer
3
Årgång
57
Utgåva
In VATTEN issue number 2, 1999, there was an article about the, at the time, newly started Water Project at the Swedish Environmental Protection Agency. That project, which was completed after two years, had as its overall objective to prepare Sweden for the new EU Water Framework Directive. The present paper describes the review of […]
Publiceringsdatum
Författare
MARIA REINHOLDSON
Nyckelord (Keyword)
Water Framework Directive, SEPA, river basin district, administrative arrangements, type-specific reference conditions, programme of' measures, river basin management plans.
Nummer
3
Årgång
57
Utgåva
Sludge incineration has been used in Japan for the last 30 years, as a method to reduce the sludge volume and to destroy organic pollutants. Today, incineration is conducted mainly in conventional fluid bed incinerators, however there is a shift towards the use of circulating fluid bed incinerators instead. The occurrence of dioxins is very […]
Publiceringsdatum
Författare
DAN FUJII
Nyckelord (Keyword)
Japan, incineration, ash, fluid bed, sludge handling, phosphorus recovery, sludge use
Nummer
3
Årgång
57
Utgåva
Sewer systems influence the local urban hydrology rhrough infiltration ofgroundwarer. Experiences indicate a limited use of traditional countermeasures for limiting the inflow/infiltration. Implementing alternative schemes introduces on the other hand many new technical issues. The answers to these demand a thorough geohydrological understanding of the catchment. The ability to describe this complex interaction and to […]
Publiceringsdatum
Författare
ULRIKA ANDERSSON och LARS-GÖRAN GUSTAFSSON
Nyckelord (Keyword)
distributed hydrological modelling, groundwater inflow, integrated modelling, MIKE SHE, MOUSE, sewer system
Nummer
4
Årgång
57
Utgåva
A pilot plant study with biological treatment has been carried out at Mörrum Bruk. The pilot plant was built as the future external treatment plant, a multistage biology or a so-called Multibio. The total retention time in the biological stages was slightly more than 7 hours. The volume load was about 5,5 kg COD/m3 d. […]
Publiceringsdatum
Författare
ANDERS ULLMAN, TORGNY KINDH och CHRISTER FASTH
Nyckelord (Keyword)
EDTA-reduction, phosphorous, activated sludge, biological treatment, pulp and paper, COD-reductio
Nummer
4
Årgång
57
Utgåva
Response to variations in nutrient inputs to the southern estuary of river Göta älv on the Swedish west-coast is investigated by means of estuarine nutrient and chlorophyll (Chl-a) data from 1990–05. The estuary receives nutrients from the river, and from the Gothenburg Waste Water Treatment Plant (WWTP). Since 1972, when the WWTP was built, the […]
Publiceringsdatum
Författare
Lars Rydberg
Nyckelord (Keyword)
nutrient circulation, waste water, chlorophyll, nutrient limitation, Kattegat, Göta älv, Gothenburg,
estuarine circulation, nitrogen, phosphorus
Nummer
2
Årgång
64
Utgåva
Biological nitrogen removal by the use of Sequencing Batch Reactors (SBR) is today an accepted and well proven model. The Nowy Targ SBR plant has been in operation for 15 years, and comprehensive performance data are available for assessment. This paper focuses on the 2005 year operation, characterised by high organic and nitrogen loading and […]
Publiceringsdatum
Författare
Stig Morlin
Nyckelord (Keyword)
Nitrogen, Nitrogen removal, Nitrification rate, Denitrification rate, SBR
Nummer
2
Årgång
64
Utgåva
The Vomb lake is centrally located in the south of Sweden and is an important source for drinking water. Sydvatten AB (water company) delivers drinking water to about 300 000 inhabitants. There is an intensive agricultural activity within the catchment area, where nutrients as well as pesticides are being used. The objective of the project […]
Publiceringsdatum
Författare
Ann-Christin Sundahl, Cecilia Wennberg, Lena Tilly ,
Fredrik Wettemark, Peter Magnusson och Jakob Schuster
Nyckelord (Keyword)
water supply, European Water Framework
Nummer
2
Årgång
64
Utgåva
In this study, a comparison between Moringa Oleifera MO and aluminium sulphate was conducted for coagulation of turbide water using jar test. The optimum coagulant dosage was investigated for different levels of turbidity, and the impact on treated water properties monitored. Use of MO together with direct filtration was also investigated. Coagulation with aluminium sulphate […]
Publiceringsdatum
Författare
Emelie Arnoldsson, Maria Bergman, Nelson Matsinhe and Kenneth M Persson
Nyckelord (Keyword)
Moringa Oleifera, drinking water treatment, aluminium sulphate
Nummer
2
Årgång
64
Utgåva
Within urban stormwater management, long based on the principle of draining water as fast as possible from cites, new solutions are now being suggested. These new solutions not only protect against flooding, but also have other purposes such as pollution control and creation of recreational areas. In this paper several structural management practices (BMPs) are […]
Publiceringsdatum
Författare
LARS BENGTSSON, PETER STAHRE och EDGAR VILLARREAL
Nyckelord (Keyword)
Urban stormwarer, open system. BMP, green roof, detention pond
Nummer
3
Årgång
60
Utgåva
The Örby field is located right south of the city Helsingborg in southern Sweden. This field contains inter alia a water recharge activity and housing areas. Municipalities, like Helsingborg, are responsible for ensuring a balance both in the supply of water as well as dwellings. On the Örby field this leads to a conflict of […]
Publiceringsdatum
Författare
ROBIN GRAMSTAD
Nyckelord (Keyword)
artificial recharge, CLD, water supply, dwelling supply, group modeling, Helsingborg. Local housing, Master plan, municipal planning, sustainability, systems approach, water supply, Örby field.
Nummer
3
Årgång
60
Utgåva
Hard drinking waters give problems in several respects. The copper content can be > 2 mg/l after stagnation. The use of detergent is increased and discouloration can occur. Uppsala water work has developed a process to decrease the alkalinity and hardness of the water in a way that does not use special chemicals. The process […]
Publiceringsdatum
Författare
ROLF SUNDBERG
Nyckelord (Keyword)
Drinking water, copper, NOM (natural organic matter), binding, water treatment.
Nummer
3
Årgång
60
Utgåva
Hydroponic wastewater treatment takes advantage of the nutrient removing capacity of green plants. In addition to the nutrient assimilation, the roots provide a growth substrate for microorganisms involved in the biological treatment processes. However, to maintain year-round performance by the plants, additional energy muse be provided at higher latitudes, even if the hydroponics are situated […]
Publiceringsdatum
Författare
KARIN LARSDOTTER, ANNA NORSTRÖM and GUNNEL DALHAMMAR
Nyckelord (Keyword)
energy, greenhouse, heat, hydroponics, latitude, light, wastewater treatment.
Nummer
3
Årgång
60
Utgåva
The purpose of ground water aeration is mainly to remove un-wanted gases and impurities as well as improve the oxidation of iron and manganese. In the field tests, the ejector aeration was compared with an INKA- aerator, a membrane-aerator, a droplet-aerator and a cascade-aerator. The different aerators performance as oxygen transfer efficiency [%], aeration efficiency […]
Publiceringsdatum
Författare
JAAN KIVILOOG, ROBIN FJÄLL och KENNETH M PERSSON
Nyckelord (Keyword)
ejector aerator, oxygene transfer efficiency, oxidation.
Nummer
3
Årgång
60
Utgåva
As a part of the environmental programme for Hammarby Sjöstad, a separate system for blackwater and organic household waste has been considered. Four different systems have been compared using a system analysis approach. Design issues considered were source separation of urine, use of vacuum toilers, and advanced nutrient recovery processes such as Reverse Osmosis (RO). […]
Publiceringsdatum
Författare
DANIEL HELLSTRÖM, ERIK KÄRRMAN, BIRGITTA RYDHAGEN och OLA PALM
Nyckelord (Keyword)
nutrient recovery, anaerobic treatment, exergy, source separation, vacuum toilets.
Nummer
3
Årgång
60
Utgåva
The interest in testing of water and wastewater for toxic compounds has increased in the last few years with rsing pollutant levels from industry and with rising sensibility towards environmental problems. In order to get an early warning signal of environmental conditions the use of unicellular organism are recommended since they respond quickly and are […]
Publiceringsdatum
Författare
N. G. A. EKELUND and K.A. ARONSSON
Nyckelord (Keyword)
Euglena gracilis, motility, gravitaxis, cadmium
Nummer
2
Årgång
60
Utgåva
Sweden has implemented measures for reducing nitrogen loads to the Baltic Sea since the beginning of 1980s with an aim of doing this in a cost effective way. Cost effective nitrogen reduction is defined as minimum cost for achieving prespecified nitrogen reductions. The costs of measures are then determined by the cost at the location […]
Publiceringsdatum
Författare
ING-MARIE GREN och KATARINA ELOFSSON
Nyckelord (Keyword)
Cost effectiveness, marginal costs, nitrogen transports, input-output analysis, Baltic Sea
Nummer
2
Årgång
60
Utgåva
The possibility to optimize a landfill leachate treatment plant in order to reduce the lead content by precipitation has been investigated. The precipitation takes place when an ash cell leachate is mixed with a biocell leachate in a treatment plant. The influence of precipitation by pH, leachate flows and aeration was studied. Standard operational conditions […]
Publiceringsdatum
Författare
A. ANDERSSON, M. FAIGNANT and K. M. PERSSON
Nyckelord (Keyword)
Landfill leachate, lead precipitation, pH, operational parameters, ash, alkalinity, heavy metal.
Nummer
2
Årgång
60
Utgåva
Detailed knowledge of groundwater discharge areas is needed, among others, in those cases where polluted groundwater may threaten surface water quality. We present a method of studying the discharge areas by sampling shallow groundwater with mini-piezometers and measuring water conductivity and/or hydraulic head. Two case studies from the rivers of Björkaån near Sjöbo and Braån […]
Publiceringsdatum
Författare
VLADIMIR VANEK
Nyckelord (Keyword)
groundwater-surface water relationship, discharge areas, mini-piezometer, water conductivity, Sjöbo, Teckomatorp
Nummer
2
Årgång
60
Utgåva
A newly developed technology for nitrogen removal from ammonium-rich streams comprises two biological steps. In the first step, about half of the ammonium is oxidized to nitrite (partial nitritation) and in the second one, the remaining ammonium reacts with the formed nitrite into nitrogen gas (Anammox; anaerobic ammonium oxidation). The system was studied in a […]
Publiceringsdatum
Författare
BEATA SZATKOWSKA, ELZBIETA PLAZA, JOZEF TRELA and BENGT HULTMAN
Nyckelord (Keyword)
Anammox, conductivity, deammonification, digester supernatant, nitrogen removal.
Nummer
2
Årgång
60
Utgåva
Pilot plant-scale experiments have been carried out to study a new technology for nitrogen removal from digester supernatant. The plant comprises two parallel lines, which now operate as a two-step process. Two pilot plant reactors (each volume of 2 m3) were filled with Kaldnes rings up to 50 % of their volume. In the First […]
Publiceringsdatum
Författare
JOZEF TRELA, ELZBIETA PLAZA, BEATA SZATKOWSKA, BENGT HULTMAN, JAN BOSANDER och ALF-GÖRAN DAHLBERG
Nyckelord (Keyword)
anammox, deammonification, digester supernatant. nitrification, nitrogen removal.
Nummer
2
Årgång
60
Utgåva
Constructed wetland systems have attracted attention as suitable methods to treat landfill leachate. Experiences are promising in several European countries and in the North America, but Swedish experiences are limited so far. There is an interest for this solution also in Sweden and a number of constructed systems have recently been established. The aim with […]
Publiceringsdatum
Författare
LENA JOHANSSON WESTHOLM
Nyckelord (Keyword)
Bölstad, filter material, Hagby, Isätra, Löt, Spillhaug, wetland species
Nummer
1
Årgång
60
Utgåva
The purpose of the project ”Bra Små Avlopp” or ”Small Well functioning Sewage plants” was to evaluate and demonstrate new solutions for decreasing the discharges from on site wastewater treatment plants. Seven of the investigated facilities were package plants, two were urine separating plants with large sand filters, two had septic tanks to collect wastewater […]
Publiceringsdatum
Författare
DANIEL HELLSTRÖM och LENA JONSSON
Nyckelord (Keyword)
Avloppsvatten, enskilda avlopp, minireningsverk, urinseparering, klosettavloppseparering, mark-bäddar, kemisk fällning.
Nummer
1
Årgång
60
Utgåva
The purpose of ground water aeration is mainly to remove unwanted gases and impurities as well as improve the oxidation of iron and manganese. A commercial ejector aerator was characterized in laboratory and field and the performance was compared in field studies with other aeration methods used in full scale in water-works. This evaluation was […]
Publiceringsdatum
Författare
JAANKIVILOOG, ROBIN FJÄLL och KENNETH M PERSSON
Nyckelord (Keyword)
ejector aerator, oxygen transfer efficiency, oxidation
Nummer
1
Årgång
60
Utgåva
One of the main issues ot the research programme ”Sustainable Urban Water Management” (UW), which is funded by the Swedish Foundation for Strategic Environmental Research (MISTRA), is if existing urban water management is sustainable and what measures may be undertaken if it is not. This paper focuses on the ecological dimension of sustainability and its […]
Publiceringsdatum
Författare
DANIEL HELLSTRÖM, MATTIAS HJERPE, HÅKAN JÖNSSON, PER-ARNE MALMQVIST, HELENA PALMQUIST
Nyckelord (Keyword)
Water and wastewater management, Guiding principles, Environmental quality objectives, carrying capacity.
Nummer
1
Årgång
60
Utgåva
The technical knowledge on how to improve the water quality in eutrophicated waters is relatively well known, whereas the tools available for society to manage and sustain reasonable water quality are less developed. We suggest that instead of viewing freshwater systems as problems, they should be viewed as resources possible to make use of in […]
Publiceringsdatum
Författare
LARS-ANDERS HANSSON, LENNART J. LUNDQVIST och LARS DRAKE
Nyckelord (Keyword)
diversifierat brukande, produktion, brukande, konflikt, vatten, vattenvård
Nummer
2
Årgång
56
Utgåva
The quality of waste receiving waters is in Sweden monitored on catchment basis to gain knowledge for decisions on water protection measures. The results are presented in annual reports. Questions have been raised regarding the effectiveness of this monitoring. Therefore, 25 reports covering different types of catchments have been evaluated (mainly the chemical parts). Issues […]
Publiceringsdatum
Författare
CURT FORSBERG
Nyckelord (Keyword)
Waste receiving waters, water quality, monitoring programmes, evaluation
Nummer
2
Årgång
56
Utgåva
A treatment plant for landfill leachate was created in 1997 in connection to Gärstad waste treatment plant near the town of Linköping, Östergötland, Sweden. The treatment plant consists of one aerated outlevelling basin (former clay pit) and three constructed ponds. The ponds are 0.3 m in the first half (to keep oxygen in the water) […]
Publiceringsdatum
Författare
INGE LINDAHL
Nyckelord (Keyword)
landfill leachate treatment, nitrogen and phosphorus reduction, clinker and ashes, wetland
Nummer
3
Årgång
56
Utgåva
Water quality improvements for catchment areas are optimal if they take into account local variation in geophysic, hydrologic and economic conditions. A model is developed which uses a series of matrices to describe local variation with respect to ecological and socio-economic variables. This model may be used by catchment based interest groups to evaluate and […]
Publiceringsdatum
Författare
DENNIS COLLENTINE, ÅSA FORSMAN, SOFIA KALLNER,
NIKOLAY SOKRUT och ANNIKA STÅHL-DELBANCO
Nyckelord (Keyword)
Integrated Resource Management, catchment, planning, water quality
Nummer
3
Årgång
56
Utgåva
Research on flow dynamics is believed to open ways for increasing the capacity of the Dissolved Air Flotation (DAF) process in water and wastewater treatment. The paper describes a study on the flow dynamics at Lund Institute of Technology in Sweden. By using an Acoustical Doppler Velocimeter (ADV) flow structures were determined in a pilot […]
Publiceringsdatum
Författare
MÅNS LUNDH, LENNART JÖNSSON och JAN DAHLQUIST
Nyckelord (Keyword)
Water and Wastewater Treatment, Separation, Dissolved Air Flotation, Fluid Dynamics, Stratified Flow, Acoustical Doppler Velocimeter, Micro-bubbles
Nummer
3
Årgång
56
Utgåva
Re-use options for sewage sludge are being developed since the disposal of sludge is becoming an increasing problem. The spreading of sewage sludge on agricultural fields as a phosphorus (P) fertiliser is one such option given that it fulfils the requirements for limitation values for metals/toxic substances. The plant availability of P in sludge has […]
Publiceringsdatum
Författare
LENA JOHANSSON
Nyckelord (Keyword)
Fertilizer, Phosphorus, Plant availability, Sewage sludge
Nummer
3
Årgång
56
Utgåva
The new world of IT looks like a very fast stream of ever more fantastic ideas and tools. The focus is entirely on the future. In the fields of water supply and sewage systems we use IT-solutions in order to make our daily work more efficient and comfortable. More ore less we have done so […]
Publiceringsdatum
Författare
KENT ALM
Nyckelord (Keyword)
verksamhetssystem, GIS-verktyg, webb-teknik, planeringsverktyg, modeller, datorstöd, vision
Nummer
3
Årgång
56
Utgåva
Series of daily precipitation including 89 years from Malmö, Halmstad and Göteborg have been analyzed as well as daily precipitation from 230 stations in Skåne in the period 1961–1990. The distribution in space and time has been investigated, and also the relation between daily rainfall and different parameters. The most extremeindependent events have occurred rather […]
Publiceringsdatum
Författare
Lars Bengtsson
Nyckelord (Keyword)
spatial distribution, return period, precipitation network
Nummer
1
Årgång
64
Utgåva
High population growth and an augmented tourist industry in the Atitlán basin have lead to increases in the amount of wastewater discharged into the lake. The polluted wastewater has a negative effect on the lake’s and streams’ ecosystem in the basin. Drinking water that is taken from the lake or the streams is highly polluted […]
Publiceringsdatum
Författare
Jonás A. Dobias and Ilan Leshem
Nyckelord (Keyword)
Atitlán Lake, Guatemala, wastewater management, subsurface flow wetland, decentralized systems
Nummer
1
Årgång
64
Utgåva
To what extent can infiltration be carried out and which volume can be infiltrated? At the landfill Spillepeng of SYSAV, Malmö, infiltration of leachate has been practiced as a treatment method since 2001. A number of chemical parameters for infiltrating leachate and infiltrated leachate at the landfill Spillepeng have been investigated. Further on, a chemical-hydraulical […]
Publiceringsdatum
Författare
Zara Isacsson och Kenneth M Persson
Nyckelord (Keyword)
Spillepeng, leachate, metals, infiltration, hydraulic retention time, recirculation
Nummer
1
Årgång
64
Utgåva
Local politics can be complicated. However, the construction of a wastewater treatment plant is very seldom a topic for disputes. But in the case of Skurup municipality, Sweden, it grew to become an issue that took 12 years to settle. The local council discussed whether the sewerage water should be treated in a new plant […]
Publiceringsdatum
Författare
Kenneth M Persson
Nyckelord (Keyword)
Political decision, Skurup, Wastewater treatment plant, Local council, Political issues, choice of recipients
Nummer
1
Årgång
64
Utgåva
Wetland Oxelösund was established in 1993 to remove nitrogen from wastewater before discharge to the Sea. Since it was the first full-scale wetland for nitrogen removal in pre-treated municipal wastewater in Scandinavia, an elaborate monitoring program was tied to the operation of the wetland. The basic monitoring was primarily aimed at mass-balance calculations to estimate […]
Publiceringsdatum
Författare
JONAS ANDERSSON, HANS BERTIL WITTGREN och PETER RIDDERSTOLPE
Nyckelord (Keyword)
constructed wetland, Oxelösund, nitrogen, ammonium, phosphorus, BOD, indicator micro-organisms
Nummer
4
Årgång
56
Utgåva
Landfill leachate treatment methods are discussed and their effects are reviewed. The lack of agreement between actual treatment effect and the goals and methods that have been proposed by the Swedish Environmental Protection Agency are elucidated. The knowledge of what the recipient that is exposed for land-fill leachate actually can stand is argued as the […]
Publiceringsdatum
Författare
KENNETH M. PERSSON. LARS BEVMO och KENTH HASSELGREN
Nyckelord (Keyword)
landfill leachate, treatment methods
Nummer
4
Årgång
56
Utgåva
A method for tightness testing of pipelines made from viscoelastic materials obeying the power-law is described. Both theory and experiments show that creep effects will be ”frozen in” during a certain period of time, long enough for measuring the tightness of a pipeline or vessel. The time sequence may be scale up and down as […]
Publiceringsdatum
Författare
THOR MELAND
Nyckelord (Keyword)
plastic, pipeline, testing
Nummer
4
Årgång
56
Utgåva
This paper presents the results of batch and column experiments that investigated the degradation of chlorinated solvents bv zerovalent granular iron. These experiments were designed to produce data essential for the installation of a field-scale permeable reactive barrier at a field site with groundwater contaminated bv perchloroethylene (PCE) and other less chlorinated ethenes. The batch […]
Publiceringsdatum
Författare
ROGER B. HERBERT, ANNA NORDQVIST, ANN-CHRISTINE WlKLANDER, and JOHAN ERICSSON
Nyckelord (Keyword)
perchloroethylene, reactive barrier, zerovalent iron, solven
Nummer
4
Årgång
56
Utgåva
Transdisciphnary research needed to understand persistent problems in the aquatic environment. An overview of the aquatic environmental problems in Swedish coastal waters over the last decades, shows that eutrophication and fisheries mismanagement are persistant problems which seem to defy attempts to implement a long-term solution. These problems appear with different intensity in time and space […]
Publiceringsdatum
Författare
ANDERS CARLBERG
Nyckelord (Keyword)
adaptive management; integrated coastal zone management (ICZM); UNCED; EU; coastal fishery; eutrophication; social science
Nummer
4
Årgång
56
Utgåva
To treat water of varying quality, composition and origin in constructed wetlands has attracted increased attention in recent years in Sweden. In agricultural districts this interest has been manifested by the creation of wetlands to prevent nutrient leakage, while in urban areas by the establishment of wetlands/ponds to purify and balance storm water flows, or […]
Publiceringsdatum
Författare
HELENA KRANTZ och MA TTIAS HJERPE
Nyckelord (Keyword)
wetlands, dams, wastewater, stormwater, recreation, polishing, land use conflicts, city-planning
Nummer
4
Årgång
56
Utgåva
EU has recently adapted a frame directive for Water. Within three years the present organisation for Water Conservation in Sweden has to be completely restructured. At regional level there will be a number of River Basin Authorities. Agencies for implementation will be organised at local levels and district levels, based on geographically identified river basins. […]
Publiceringsdatum
Författare
PER-OLOF HAKEMAN
Nyckelord (Keyword)
river basin management, people's participation, co-operatives, Southern Sweden
Nummer
4
Årgång
56
Utgåva
Reactive filter material, sorbents, can be used to remove phosphorus (P) from wastewater through sorption processes. The technique implies that the wastewater pass a fdter that is incorporated in a soil bed or a constructed wetland. When P-saturation is achieved, the sorbent can be recycled to agriculture, since the sorbed phosphorus is available for plant […]
Publiceringsdatum
Författare
LENA JOHANSSON, LARS D. HYLANDER och GUNNO RENMAN
Nyckelord (Keyword)
fosfor, kalk, korn, opoka, slagg.
Nummer
3
Årgång
55
Utgåva
This paper is based on several studies on the long-term development of water and sanitation services in Finland and presents the evolution of domestic wastewater treatment in Finland in the 20th century. It shows that the first phase of wastewater treatment development took almost 60 years; thereafter the systems expanded rapidly over two decades to […]
Publiceringsdatum
Författare
TAPIO S. KATKO & JUSSI LEHTONEN
Nyckelord (Keyword)
evolution, water pollution control, domestic wastewaters, wastewater treatment, Finland
Nummer
3
Årgång
55
Utgåva
The governing processes involved in both urban and rural hydrology are the same, but the climatic and surface conditions in the urban environment are different, hence, snowmelt and runofFgeneration also differ. However, snowmelt is a neglected part of urban hydrology. Indeed, urban runoffmodels and drainage systems have been developed for rainfall events. This paper discusses […]
Publiceringsdatum
Författare
ANNETTE FAYE SEMADENI-DAVIES
Nyckelord (Keyword)
snow, waste water, stormwater, radiation, energy balance, urbanisation, landuse, heterogeneity.
Nummer
3
Årgång
55
Utgåva
The eutrophication of the Balric Sea has resulted in a decision in the Swedish Parliament that every wastewater treatment plant on the Baltic coast with more than 2000 customers has to have a nitrogen reduction system. This investigation compares the three methods for nitrogen reduction, that are in full use in Sweden: constructed wetlands, fluidized […]
Publiceringsdatum
Författare
EVA HÅKANSON
Nyckelord (Keyword)
wastewater, treatment, nitrogen reduction, methods, comparison
Nummer
3
Årgång
55
Utgåva
Available observations are often not suffcient as a basis for decision making in water management. Conceptual runoff models are frequently used as tools for a wide range of tasks to compensare the lack of measurements, e.g. to extend runoff series, compare design floods and predict the leakage of nutrients or the effects of a climatic […]
Publiceringsdatum
Författare
JAN SEIBERT
Nyckelord (Keyword)
validation, conceptual runoff models, calibration, uncertainty, TOPMODEL, HBV model.
Nummer
3
Årgång
55
Utgåva
Historically people and institutional actors have always joined together to manage water problems in a situation of water scarcity. Examples of river basin administrations in China, Germany, England and Wales and France are given in this paper. It is noted that the French water management system has become the model for the EU Commission Proposal […]
Publiceringsdatum
Författare
JAN-ERIK GUSTAFSSON
Nyckelord (Keyword)
river basin, water management, water policy, European Union, France, Sweden
Nummer
4
Årgång
55
Utgåva
The activities at the Department of Water Resources Engineering (previously the Department of Hydraulics) from 1966-1988 was characterized by a socially a ware attitude to water issues. There were obvious reasons for such an approach. The department launched its activties in the midst of global concerns for the lack of adequate water resources to meet […]
Publiceringsdatum
Författare
GUNNAR LINDH
Nyckelord (Keyword)
water resources planning, coastal erosion, urban runoff
Nummer
4
Årgång
55
Utgåva
During the past century human activides have at least doubled the rate ofnitrogen fixation in the global landbased nitrogen cycle. Besides being beneficial to human societal development, this has many deleterious consequences for the environment. As part ofthe responses to the call for world-wide acrion on the problems with nitrogen, this paper focuses on the […]
Publiceringsdatum
Författare
FREDRIK BURSTRÖM
Nyckelord (Keyword)
Decentralisarion, Environmental management, Environmental policy, Local, Municipality, Nitrogen, Regional, Swede
Nummer
4
Årgång
55
Utgåva
Bivalves were used as environmental biomonitors by studying the growth rate and the structure of their shells, as well as by analysing elemental distribution in the shells. Information about water chemistry, temperature and pH, precipitarion, food supply and other environmental paramerers are stored in the bivalve shells. To be able to disclose the environmenral archives […]
Publiceringsdatum
Författare
DUNCA, E
Nyckelord (Keyword)
bivalves, environment, shells
Nummer
4
Årgång
55
Utgåva
VBB VIAK has developed a useful planning tool for stormwater management. It is presented in a GIS format with links to spreadsheet models in Excel and/or databases in Access. RunofFwater flows and pollutant loads are calculated in the watershed management model Stormtac. Data from Stormtac, together wkh exisung measurements and sampling data, are exported into […]
Publiceringsdatum
Författare
THOMAS LARM and ANNA HOLMGREN
Nyckelord (Keyword)
stormwater, GIS, material transport, watershed, land use, treatment, planning, nutrients, metals
Nummer
4
Årgång
55
Utgåva
A hydrochemical model, HBV-N, was set up in a first simple applicarion to simulate the river-borne transport of nitrogen to the Baltic Sea and its main basins. The land area of 1729 000 km2 was divided into 25 subbasins. The input data were coarse and the model was calibrated against long term monthly mean concentradons […]
Publiceringsdatum
Författare
ANNA PETTERSSON, MAJA BRANDT and GÖRAN LINDSTRÖM
Nyckelord (Keyword)
Baltic Sea, nitrogen transport, nitrogen load, HBV-N, HBV, modelling, HOME
Nummer
1
Årgång
56
Utgåva
The Swedish Delegation for Sustainable Technology and Stockholm Water Co. have initiated a competition for the design and construction of small wastewater treatment units. Improvements in environmental impact and potential for nutrients recycling are expected, compared with conventional technology used today, i.e. settling and infiltrarion or filtration beds. Such differenr types of treatment systems are […]
Publiceringsdatum
Författare
DANIEL HELLSTRÖM, LENNART QVARNSTRÖM , OLA PALM, ANDERS FINNSON & CARL-MAGNUS PETTERSSON
Nyckelord (Keyword)
On site treatment, package plants, SBR, submerged biofilm reactors, source separadon, chemical precipitation
Nummer
1
Årgång
56
Utgåva
The economic value of two alternative ways of nitrogen abatement are calculated: recent development of cleaning capacities at sewage treatment plants and ihe use of coasral zones nitrogen sink capacity. The values calculated as cost savings obtained from the alternative technologies. The analysis reveals that the value of technologies increase for higher levels ofnutrienr reducrions […]
Publiceringsdatum
Författare
Ing-Marie Gren, Ragnar Elmgren, Anders Engqvist, Ulf Larsson och Henrik Sharin
Nyckelord (Keyword)
economic value, nitrogen abatement, sewage treatment plants, coastal zones
Nummer
1
Årgång
56
Utgåva
Collection and treatment of the gas and leachate during the active period of a landfill is proposed in the EC landfill direcrives and in the proposal for new landfill directives in Sweden in order to reduce the risk for methane gas emissions and contamination of water resources. The directives propose an increased pretreatment of the […]
Publiceringsdatum
Författare
DAVID BENDZ, TORLEIF BRAMRYD, JAN-ERIK MEIJER och TOMMY OHLSSON
Nyckelord (Keyword)
landfill, sustainable, strategy, directive, EU, Sweden
Nummer
1
Årgång
56
Utgåva
Long-term changes of the chemical composition and biological quality of Lacvian inland waters have been evaluated. Water composition, the major factors influendng water chemistry, and the human impacts were studied to determine the changes after recent reductions ofpollution emissions, particularly nurrient loading, to surface waters. The chemical composition much depends on hydrological factors, which differs […]
Publiceringsdatum
Författare
MÄRIS KLAVINS, GUNTA SPRINGE, VALERY RODINOV, IVARS DRUVIETIS , ELGA PARELE and AGRITA BRIEDE
Nyckelord (Keyword)
trends, aquatic chemistry, aquatic biology
Nummer
1
Årgång
56
Utgåva
The removal of humic substances during drinking water preparation by artificial recharge of groundwaters using synthetic sorbents, activated carbon and anthracite was assessed. Humic (HA) and fulvic (FA) acids isolated from soil, peat, water, filters, from the infiltration basin for artificial groundwater recharge, as well as commercial humic acid, were used in study. It was […]
Publiceringsdatum
Författare
MARIS KLAVINS, TALIS JUHNA, LINDA EGLI'TE
Nyckelord (Keyword)
humic substances, sorption, drinking water, artificial groundwater recharge
Nummer
2
Årgång
56
Utgåva
The objective of this study was to determine the importance of ammonium adsorption compared to other nitrogen separation and transformation processes, when infiltrating wastewater into vertical soil treatment systems. Mass balance calculations based on literature values were employed, but also complementary column experiments were performed to quantify the ammonium adsorption capacity of sand with respect […]
Publiceringsdatum
Författare
ANNELIE HEDSTRÖM
Nyckelord (Keyword)
Nitrogen, Ammonium, Nitrification, Adsorption, Rapid infiltration, Soil treatment system, Sand, Column experiment, Mass balance calculation
Nummer
2
Årgång
56
Utgåva
Käppala wastewater treatment plant on Lidingö was extended for nitrogen removal. Due to the new process configuration the plant could implement biological phosphorus removal (bio-P). To study the possiobilities to introduce bio-P removal at the plant, fullscale and simulation tests were conducted. Results from the fullscale tests did not give any good answers since metal […]
Publiceringsdatum
Författare
DAN FUJII
Nyckelord (Keyword)
activated sludge, biological phosphorus removal, computer simulation, full-scale, GPS-X, secondary P- release,UCT,VFA
Nummer
2
Årgång
56
Utgåva
There are an increasing interest for use of wetlands and irrigation solutions regarding treatment of sewage water in Sweden. The reasons behind this development, and practical consequences of the implementation of these solutions, provide us with characteristics of the changes. To be able to understand the possibilities for sustamable development in Sweden, such results are […]
Publiceringsdatum
Författare
HENRIETTE SÖDERBERG, KARIN S. TONDERSKI, ELISABETH JOHANSSON
Nyckelord (Keyword)
mark-växtsystem, Agenda 21, kommuner, attityder, organisation, aktörer, våtmarker, bevatrning, kväve
Nummer
2
Årgång
56
Utgåva
Quantification of toxins from blue-green algae (cyanobacteria), particularly the hepatoxic microcystins, has become a routine procedure in assessment of drinking-water quality in many countries. The effect of storing water samples frozen prior to toxin analysis was examined using a laboratory culture of Planktothrix agardhii. In culture material prepared (filtered and toxins in the culture medium […]
Publiceringsdatum
Författare
PETERHENRIKSEN, HANS UTKILEN og NINA GJÖLME
Nyckelord (Keyword)
Microcystin, cyanobacteria, water quality, toxin analysis.
Nummer
2
Årgång
56
Utgåva
Artifcial recharge of groundwater is being used for drinking warer production in Latvia. The ultimate removal of organic matter from the surface water during artificial recharge of groundwater is accomplished by microrganisms living in the subsurface. In order to predict changes of water quality, more information about the disribution of microorganisms between infiltration ponds and […]
Publiceringsdatum
Författare
TALIS JUHNA and GUNTA SPRINGE
Nyckelord (Keyword)
artificial recharge of groundwater, schmutzdecke, filter sand, vadose zone, microorganisms.
Nummer
4
Årgång
54
Utgåva
CHEMICAL OXYGEN DEMAND (DICHROMATE VALUE) AND THE SWEDISH BAN ON MERCURY, OPPORTUNITIES AND PITFALLS
The Chemical Oxygen Demand (COD) test is a key parameter for process control and the routine monitoring of effluent quality in wastewater. However, the present procedure for determination has ro be replaced becausethe scale of COD test chemicals containing Hg will probably not be permitted after the year 2000 in Sweden. Mercury-free procedures are reviewed […]
Publiceringsdatum
Författare
GREGORY M. MORRISON
Nyckelord (Keyword)
chemical oxygen demand, mercury free COD, closed rube COD, total organic carbon
Nummer
4
Årgång
54
Utgåva
This paper describes differences between the urban drainage models MOUSE, EPA-SWMM and NIVANETT, relating to the routing of flows through pipes. NIVANETTs kinematic wave procedure simulates rather similar hydrographs to those of MOUSE, when the conduit lengths are shorter than ca. 500 m and the slope is steeper than ca. 1/1000. Keeping in mind that […]
Publiceringsdatum
Författare
O. LINDHOLM and G. LINDHOLM
Nyckelord (Keyword)
models, storm runoff, hydrographs, comparison
Nummer
4
Årgång
54
Utgåva
The paper describes the trends of water consumption, particularly per capita in Finland from 1970 to 1996 and includes comparisons from other countries. The per capita consumption started to decline due to two major impetus; the energy crisis of 1973 and the Wasrewater Surcharge Act of 1974. The latter more than doubled the average price […]
Publiceringsdatum
Författare
TAPIO S. KATKO, PETRIJU HOLA and SAILA KALLIOINEN
Nyckelord (Keyword)
water consumption, specific consumption, households, design criteria, Finland
Nummer
4
Årgång
54
Utgåva
The Rya Wastewater Treatment Plant, serving the Göteborg Region on the West Coast ofSweden has been ex- ended for nitrogen removal. The process includes post nitrification in trickling filters and predenitrification in non-nitrifying activated sludge system. In this paper some experience from the first year of full-scaleoperation will be related. The staied effluent standard of […]
Publiceringsdatum
Författare
ANN MATTSSON
Nyckelord (Keyword)
nitrifying trickling filter, post nitrification, nitrogen removal, biofilm, predators, full scale operation
Nummer
4
Årgång
54
Utgåva
A large number of biological processes have been developed to meet different needs since the early forms of the trickling filter and the activated sludge process were introduced. One of the goals developing new processes often was to increase the total amount ofbiomass in the process. In several of these new processes, the surfaces of […]
Publiceringsdatum
Författare
ERIK SÄRNER
Nyckelord (Keyword)
moving bed, carriers, biofilm process, biological treatment, review
Nummer
4
Årgång
54
Utgåva
The paper presents the Swedish Water Management Research Program towards catchment-based strategies for sustainable resource use (VASTRA). The major goal ofVASTRA research is to develop catchment-based water management strategies which are sustainable from ecological, economical and social perspectives. As a. point of departure, VASTRA views catchments from three pardy overlapping resource perspectives. The first one […]
Publiceringsdatum
Författare
H. B. WITTGREN
Nyckelord (Keyword)
aquatic biodiversity, decision support tools, ecological services, ecotechnological methods, groundwater management, multi-disciplinary research
Nummer
4
Årgång
54
Utgåva
The Swedish urban water systems have been in use and under continuous development for more than a century. The urban water systems of today fulfil to a high degree basic requiremenrs concerning safety, hygiene and protection of the environmeni. For the past years, however, the systems have been criticised from the viewpoint of sustainability. The […]
Publiceringsdatum
Författare
PER-ARNE MALMQVIST
Nyckelord (Keyword)
water, waste water, storm water, sustainable, management
Nummer
1
Årgång
55
Utgåva
Wetland creation costs and their determinants are studied by an analysis of detailed dara on wedand creation programmes for causing nitrogen reducdon in two drainage basins in the agricultural district of SW Scania, southernmost Sweden. Estimated cost equations illustrate the importance of excavarion efforts for obtaining good predicrions of creation costs. An analysis of the […]
Publiceringsdatum
Författare
TORE SODERQVIST
Nyckelord (Keyword)
wetlands, nkrogen sinks, costs
Nummer
1
Årgång
55
Utgåva
LÄCKSÖKNING PÅ SJÖLEDNING I BORÅS / Leakage detection on a pressure main situated in a lake in Borås
Pressure recordings during transient conditions can be utilized for leak detection purposes on single pipes. This method has been described in a research project report CVA-Forsk, 1997) by the authors. In this case study a pressure main, situated in a lake and subjected to a leak, was examined by using pressure recordings. Two possible leak […]
Publiceringsdatum
Författare
LENNART JÖNSSON och ANDERS SVENSSON
Nyckelord (Keyword)
pipeline, leak detection, hydraulic transients, case study
Nummer
1
Årgång
55
Utgåva
Expansion for nitrogen reduction on Kalmar wastewater Treatment Plant (KARV) was realized with 2 sequencing batch reactors (SBR) for separate treatment of filtrate water. Online measuring instrumems were installed to make control of the SBR-process easier. The waterlevel and DO-meters are used for automatic operation control, whereas information on sludge content, pH, redox-pontential, ammonium and […]
Publiceringsdatum
Författare
REGINE HAKER
Nyckelord (Keyword)
SBR, seperate irearment offilirate water, online measuring instruments, monitoring
Nummer
1
Årgång
55
Utgåva
Models and modeling require management of the inherent complexity. Simplicity in models and modeling is a positive characteristic. Models and modeling possess no intrinsic value. Their value may be assessed only relative to an objective or a problem to be solved.
Publiceringsdatum
Författare
MAGNUS LIEDHOLM
Nyckelord (Keyword)
model, complexity, sirnplicity, intrinsic value
Nummer
1
Årgång
55
Utgåva
Mesophilic and thermophilic digestion of primary and activated sludge was investigated in lab scale reactors. Mixed primary and activated sludge was digested in one experiment and activated sludge was digesred alone in another. The same gas yield, COD and dry solids reducrion was obtained with both mesophilic and thermophilic digestion. However, more dissolved COD was […]
Publiceringsdatum
Författare
JOHN SORENSEN, GUNNAR THOLSTRUP and KJAER ANDREASEN
Nyckelord (Keyword)
mesophilic and thermophilic digestion, thermal hydrolysis, gas producdon, COD and sludge reduction, filterability of sludge
Nummer
1
Årgång
55
Utgåva
In September 1997, the benthic habitat in Åsfjorden in Lake Vänern was studied at 23 stations by sediment profile imaging. Grab samples for qualitative analysis of the fauna was taken at nine stations. The sediment surface was oxidized at all stations and showed indication of biological activity by rubificids and chironomids in the entire Åsfprden. […]
Publiceringsdatum
Författare
RUTGER ROSENBERG. ANDERS SVENSON, HANS C. NILSSON och GÖRAN PETTERSSON
Nyckelord (Keyword)
benthos, bioturbation, oligochaeies, tubificids
Nummer
2
Årgång
55
Utgåva
The development and application of simulation models in water and environmenral planning and management have expanded greatly over the last decades. Such models are used in, for example, water quality assessments, and it is expected thai models will be applied for analyses and decision making to a greater and greater extent in the future. However, […]
Publiceringsdatum
Författare
JAN HÖYBYE
Nyckelord (Keyword)
hydrology, water quality, models, data analysis, optimisation, uncertainty, prognosis
Nummer
2
Årgång
55
Utgåva
The relationships between water composition, formation factors and human impact were studied. Runoff was dependent on hydrological factors, but differing levels between eastern and western Larvia. Since knowledge of the seasonal dynamics of nutrient concentrations, and of the nutrient sources and sinks are especially important, the specific loads from different parts of Larvia were evaluaied. […]
Publiceringsdatum
Författare
MARIS KLAVINS, VALERY RODINOV, ILGA KOKORlTE and INTA KLAVINA
Nyckelord (Keyword)
aquatic chemistry, Latvia, runoff, pollution
Nummer
2
Årgång
55
Utgåva
A model system for advanced management of accidental toxic spill in drinking water sources is described. The system is based on the 1-D river model RIVTOX and 3-D lake model THREETOX. The model system was applied to the Lake Vomb catchment, which is located in the south of Sweden and from which approximately 400 000 […]
Publiceringsdatum
Författare
L. IRITZ, V. MADERICH, N. MARGVELASHVILI, M. VUKOVIC, and M. ZHELEZNYAK
Nyckelord (Keyword)
model system, river model, lake model, RIVTOX, THREETOX, hydrology, accidental toxic spill, Vomb, suspended sediment, sorpdon, desorption
Nummer
2
Årgång
55
Utgåva
In a not too distant furure we will be working wiih Water management in Sweden, covering all river basin districts, with access to steering instrumenrs enabling us to achieve the decided objeaives. For decades people with specific interest in water management in Sweden have been trying to use water management in physical planning and environmental […]
Publiceringsdatum
Författare
ANDERS BERNTELL
Nyckelord (Keyword)
ramdirektiv vatten, vattendirektiv, vattenplanering, vattenpolicy, avrinningsdistrikt, övervakning, åtgärdsprogram
Nummer
2
Årgång
55
Utgåva
The article gives a presentation of the Swedish environmental protecaon agency‘s project on Water management, a project concerning warer management and the implementation process of the EG Water framework directive on water policy. The overall aim of the project is to enhance the process ofimplementation, doing so by trying to find our difficulties concerning our […]
Publiceringsdatum
Författare
HÅKAN MARKLUND
Nyckelord (Keyword)
Water project, Water framework directive, Water management, implementation, strategies
Nummer
2
Årgång
55
Utgåva
The focus on environmental aspects in the society has increased the strive to find sustainable sysrems for drinking water production. This has lead to a greater inrerest in biological filtration, for example slow sand filtration (SSF). Biological pretreatment of raw water might reduce the need for chemicals in the following treatmem steps, with reduced sludge […]
Publiceringsdatum
Författare
JOHANNA BLOMBERG, JOHANNA ÖMAN
Nyckelord (Keyword)
drinking water, NOM, biological filtration, reversed process, slow sand filtrarion
Nummer
3
Årgång
55
Utgåva
The changes in the state of equilibrium between the two common Baltic sea-algae Cladophora glomerata and Ceramium tenuicorne as a result ofeutrofication and the discharge of metals has been studied. The results show that C. glomerata is more capable than C. tenuicorne to utilize an enhanced content of nutritive substances for growth. C. glomerata shows […]
Publiceringsdatum
Författare
MARTIN EKLUND
Nyckelord (Keyword)
Algae, C. tenuicorne,C. glomerata, Baltic sea, eutrophication, competiton
Nummer
1
Årgång
54
Utgåva
Stockholm Water Company operates two waterworks, Norsborg och Lovö. Both treat raw water taken from Lake Mälaren with the following process: coagulation with aluminium sulphate, sedimentation, rapid sand filtration, slow sand filtration and desinfection with chloroamine. A pilot plant scale test was performed at Lovo waterworks during spring 1996. The main objective with the study […]
Publiceringsdatum
Författare
JOHANNA BLOMBERG
Nyckelord (Keyword)
drinking water, coagulation, rapid sand filtration, ferric chloride, NOM, alcalinity.
Nummer
1
Årgång
54
Utgåva
The River Emån is the largest watercourse in the south-eastern part of Sweden and it’s also one of Sweden’s most valuable rivers, both the river and parts of its surroundings, being classified as of National importance for nature conservation and cultural history. The catchment area of the river however is affected by a number of […]
Publiceringsdatum
Författare
DEA CARLSSON, ERIC HAGLUND, STELLAN HAMRIN, ÅSA JOHANSSON, STEFAN SVENAEUS, LARS THORELL och BO TROEDSSON
Nyckelord (Keyword)
The river Emån, river basin, environmentally sustainable development
Nummer
1
Årgång
54
Utgåva
Scientists at the Royal Institute of Technology and members of the Swedish Water Environmental Council have completed a pre-investigation concerning the conditions for export of water on a large scale from Sweden and Finland. Different aspects associated with water export were studied within the frame of the pre-investigation. They involve global and regional needs of […]
Publiceringsdatum
Författare
OVE STEPHANSSON och BÖRJE BERGMAN
Nyckelord (Keyword)
water shortage, pre-investigation, the Dalälven river, water export
Nummer
1
Årgång
54
Utgåva
There is a growing need and demand for the removal of nutrients from the wastewater of isolated households and small rural communities; ecological engineering through natural and constructed wetland systems shows promise in meeting stringent wastewater treatment criteria. Wetlands constructed with different hydraulic designs have shown a range of nutrient removal efficiencies. Vertical stratification has […]
Publiceringsdatum
Författare
NEDA FARAHBAKHSHAZAD and GREGORY M. MORRISON
Nyckelord (Keyword)
Ecological engineering, wastewater treatment, constructed wetlands, subsurface flow wetlands, vertical flow wetlands, nutrient removal
Nummer
1
Årgång
54
Utgåva
Consideration of the impact of preferential flow is important for accurate predictions of phosphorus (P) losses for structured soils. The possibilities for adapting the GLEAMS model to preferential flow were investigated for two tile-drained structured clay soils, one in south-west Sweden and the other in central Sweden The results indicated that GLEAMS was capable of […]
Publiceringsdatum
Författare
BARBRO ULEN, ADEL SHIRMOHAMMADP and FARUK DJODJIC
Nyckelord (Keyword)
dissolved phosphorus, drainage losses, modelling, particulate phosphorus, preferential flow.
Nummer
1
Årgång
54
Utgåva
In Austria as well as in most countries pollution of different kind has become more and more severe. This paper is about nitrate polluted groundwater 30 km north of Vienna and how to reduce the content of nitrate in situ. The denitrification method is according to the NITREDOX method. The content of the nitrate is […]
Publiceringsdatum
Författare
GERHARD JECHLINGER, WILHELM EIBL, RUDOLF MARTINELL
Nyckelord (Keyword)
aquifer, nitrate, nitrite, groundwater, NITREDOX
Nummer
1
Årgång
54
Utgåva
System Aqua has been designed to meet the growing need for an objective, reproducible and comprehensive tool for assessing the conservation value of Swedish lakes and watercourses as well as for identifying waterbodies worth rehabilitation. The system may be used to provide an integrated assessment of whole catchments together with their component waters. Emphasis in […]
Publiceringsdatum
Författare
EVA WILLENoch BERTA ANDERSSON
Nyckelord (Keyword)
nature conservation, biodiversity, assessment tool, lakes, watercourses, catchments.
Nummer
2
Årgång
54
Utgåva
Trace metal concentrations in brackish and sea water can be determined by ICP-SMS (inductively coupled plasma sector mass spectrometry) with no pretreatment other than acidification and dilution. This is possible because of i) very low instrumental detection limits, and ii) the elimination of most of the spectral interferences caused by the salts. These interferences make […]
Publiceringsdatum
Författare
THOMAS RUTH
Nyckelord (Keyword)
ICP-SMS, high-resolution ICP-MS, trace element determination, sea water, brackish water
Nummer
2
Årgång
54
Utgåva
One strategy to increase the amount of nutrients recycled is to handle urine separately and use it as a fertiliser. However, an extended use of urine separation toilets will result in considerable volumes to be handled. The amount of urine solution could be reduced by using drying techniques. However, the possibilities of dewatering urine by […]
Publiceringsdatum
Författare
DANIEL HELLSTRÖM and JOHANNA THURDIN
Nyckelord (Keyword)
urine, drying, acid, nitrogen, ammonia, urea
Nummer
2
Årgång
54
Utgåva
By using an alternative road construction with permeable asphalt over an open-graded aggregate base the stormwater is infiltrated into the ground. No regular stormwater pipes and manholes are needed A full scale study of an alternative road construction in a cold climate is presented in this article. Two roads in a housing area in Luleå, […]
Publiceringsdatum
Författare
MAGNUS BÄCKSTRÖM and CARIN FORSBERG
Nyckelord (Keyword)
stormwater, runoff, permeable asphalt, cold climate, snowmelt, alternative road construction.
Nummer
2
Årgång
54
Utgåva
Snow melt and snow handling are of great concern for the municipalities in cold regions. Urban run off is influenced by the piling of snow. In order to design deposit areas, storm water systems, etc. forecasts of urban snow melt run off should consider melting of snow piles. Piling of snow delays the melt and […]
Publiceringsdatum
Författare
EVA SUNDIN
Nyckelord (Keyword)
urban hydrology, urban snow deposit, snow melt, degree day method.
Nummer
2
Årgång
54
Utgåva
The work with water resources has changed during the last two-three decades. We have solved the problems with point sources. Now we have to concentrate on the diffuse sources, within a sector integrated planning EU is working on a Framework Directive for water, with demands of river basin management. The use of water resources depends […]
Publiceringsdatum
Författare
HENRIK LINDSTRÖM
Nyckelord (Keyword)
river basin management, sector integration, physical planning
Nummer
2
Årgång
54
Utgåva
The Municipality of Skelleftea is responsible for the operation of several small wastewater treatment plants with insufficient removal of organic matter and nutrients. The small wastewater treatment plants normally consist of septic tanks. A common solution to improve the removal efficiency of small plants is to build infiltration beds. However, due to local conditions this […]
Publiceringsdatum
Författare
DANIEL HELLSTRÖM, BERNT JOHANSSON och KENNETH NILSSON
Nyckelord (Keyword)
septic tanks, small treatment plants, biological treatment, trickling filter, SBR
Nummer
2
Årgång
54
Utgåva
In 1996 Goteborg Water and Sewage Works built a stormwater detention pond, with a catchment area consisting of a city highway and a domestic area. Models of the pond in two and three dimensions were made with a finite element program, FIDAP. The hydraulic conditions have been simulated for different flow intensities. Particle removal, as […]
Publiceringsdatum
Författare
JONAS GERMAN och HENRIK KANT
Nyckelord (Keyword)
stormwater, detention pond, flow pattern, simulation, particle removal, FEM, FIDAP.
Nummer
3
Årgång
54
Utgåva
At present there is an increasing interest in rhe reduction of natural organic matter, NOM, from drinking water by biological processes instead of chemical processes. In Europe as well as in the US a lot of research is done to increase the knowledge of biological processes in slow sand filters. Removal of organic matter in […]
Publiceringsdatum
Författare
ESSIE ANDERSSON, TORSTEN HEDBERG och LENNART MARTINET
Nyckelord (Keyword)
slow sand filter, biological treatment, drinking water treatment.
Nummer
3
Årgång
54
Utgåva
Some of the problems of phosphorus pollution and source exhaustion are identified to be time-dependent, structural problems. This is demonstrated to be the case in land independent animal production, in urban settlements and in the waste-water treatment – landfill cycle. A calculation indicates that saturation of the systems can take place in the time range […]
Publiceringsdatum
Författare
FOLKE GUNTHER
Nyckelord (Keyword)
accumulation processes, balanced agriculture, energy efficiency, integrated habitats, nutrient recycling, phosphorus management, scenario analysis.
Nummer
3
Årgång
54
Utgåva
Odour and taste problems are among the most common reasons for consumer complaints to drinking water quality. This work describes extraction and quantification of volatile organic components (VOC) in water, including well-known odour components and disinfection byproducts. The analytical approach is based on purge and trap of VOC from drinking water at various experimental conditions […]
Publiceringsdatum
Författare
INGUN SKJEVRAK
Nyckelord (Keyword)
Off-flavours, odour and taste, drinking water, VOC, analysis
Nummer
3
Årgång
54
Utgåva
For sludge liqours the normal way is to lead the different reject water streams back to the inlet of the treatment plant thus producing high and irregular internal loads that can be difficult to control and which cause problems for the normal treatment. A solution to the problem is to introduce a separate treatment. Sludge […]
Publiceringsdatum
Författare
A. NYBERG, P.JOHANSSON, M. BEIER, A. HIPPEN, C. F. SEYFRIED and K.-H. ROSENWINKEL
Nyckelord (Keyword)
aerobic deammonification, sludge liquor, nitritation, denitritation
Nummer
3
Årgång
54
Utgåva
The paper describes the historical development of Hobas GRP-pipes from one person’s idea about a new design of GRP pipes to a complete new pipe material used world wide. The properties of the new material is briefly described as well as the design and Mr Carlström’s work with the standardisation of GRP pipes
Publiceringsdatum
Författare
RICHARD HANSSON
Nyckelord (Keyword)
GRP pipes, underground installation, design, buckling, DF-factors, probability calculations, safety index, safety factors.
Nummer
3
Årgång
54
Utgåva
Mass-balance studies of nitrogen, phosphorus, and suspended matter have been carried out in a created pond. The pond is situated in the drainage basin of a farmland stream in Scania, southern Sweden. The investigation started shortly after the creation of the pond and has continued for three years. The aim of the study was to […]
Publiceringsdatum
Författare
INGEMAR DELLIEN och BENGT WEDDING
Nyckelord (Keyword)
created ponds, nitrogen retention, phosphorus retention, mass-balance
Nummer
2
Årgång
53
Utgåva
The cost for reduction of nitrogen in created ponds does not exceed 45 SEK per kilogram nitrogen. This result is based upon the costs for the creation of ponds with a total area of 27 hectares in southwest Scania 1992-1996, and results from nitrogen budget studies of one pond during three years. Three municipal wastewater […]
Publiceringsdatum
Författare
INGEMAR DELLIEN
Nyckelord (Keyword)
nitrogen, wetland restoration, cost efficiency
Nummer
2
Årgång
53
Utgåva
Hydraulic transients occur at rapid flow changes in pressurized water conveying pipelines. Normally such transients (waterhammer) are considered to be a problem as they might damage the pipeline due to strong pressure peaks, subatmospheric pressures or fatigue. However, normally occurring hydraulic transients have also a potential to be utilized in an advantageous manner. ’The idea […]
Publiceringsdatum
Författare
LENNART JÖNSSON
Nyckelord (Keyword)
Hydraulic transients, pipeline, leak, gas pocket, check valve
Nummer
2
Årgång
53
Utgåva
There are wastewater treatment plants in Uppsala municipality with both high and low copper concentrations in the sludge, this is somewhat surprising as the raw water (groundwater) often is pumped up from the same esker (gravel ridge or glacial origin), the chemical composition or the water is expected to generate strong copper corrosion, as the […]
Publiceringsdatum
Författare
Hans Holmström and Ernst-Olof Swedling
Nyckelord (Keyword)
copper, corrosion, organic matter, NOM
Nummer
2
Årgång
53
Utgåva
The Swedish company, VYRMETODER AB has developed a means of treating water in an artificial aquifer according to the VYREDOX method. The method is based on degassing and aeration of raw water which is then infiltrated into the artificial aquifer. The article informs about three VYRAKVI plants installed in the mountainous region in the north […]
Publiceringsdatum
Författare
ÅKE HANSSON och ÅKE DANIELSSON,
Nyckelord (Keyword)
artificial aquifer, infiltration, degassing, oxidation, precipitation
Nummer
2
Årgång
53
Utgåva
The hardness of water, or rather the concentration of calcium and the alkalinity, has throughout the years been described with great diversity and imagination. The aim has always been to simplify the actual, nuanced and complex chemistry in question. The many assumptions and terms for these simplifications have in course of time become vague or […]
Publiceringsdatum
Författare
TIBOR NEMETH och KIM BÖRJESSON
Nyckelord (Keyword)
water hardness, alkalinity, buffer capacity
Nummer
2
Årgång
53
Utgåva
Sludge bulking has been a problem ever since the activated sludge process was introduced for wastewater treatment. The problems were accentuated when low-loaded processes for nitrogen removal were introduced. Sludge bulking may appear in many forms and be caused by many different factors. Common in low-loaded processes are bulking caused by mass-appearance of filamentous bacteria. […]
Publiceringsdatum
Författare
ERIK SÄRNER och LARS KARLSSON
Nyckelord (Keyword)
Sludge bulking, filaments, selector, kinetic control, metabolic control, nitrogen remova
Nummer
3
Årgång
53
Utgåva
Anaerobic biological treatment has proven to be a successful method for reducing Cr(VI) in a leachate from Vargön Alloys AB. Influent chromium concentrations ranged from 10-120 mg/L and satisfactory reduction was achieved in both laboratory and pilot plant studies, as long as sufficient amounts of electron donor were added. Glucose, acetic acid and sulfite evaporator […]
Publiceringsdatum
Författare
KAREN ANDERSSON and MARIA ROSEN
Nyckelord (Keyword)
hexavalent chromium, chromate reduction, biological treatment, biofilm process, suspended carriers, electron donor
Nummer
3
Årgång
53
Utgåva
The objectives of this study were to investigate the possible effects of freeze/thaw-drying and drying as sludge dewatering methods on the organic matter, nitrogen, and phosphorus content in the sludge. The research work was carried out on three different levels. The effect of natural sludge dewatering on the overall status of the sludge was mainly […]
Publiceringsdatum
Författare
DANIEL HELLSTRÖM and ELISABETH KVARNSTRÖM
Nyckelord (Keyword)
natural sludge dewatering, combined freezing and drying, northern Sweden, organic matter, phosphorus, nitrogen, cold climate engineering
Nummer
3
Årgång
53
Utgåva
The paper describes the use of wooden pipes, particularly drilled pine logs, as rural water conduits in Finland. The first documented case of such a system serving a single house is from Ilmajoki, Ostrobothnia from 1865. Later on, the system was expanded and the first joint system was completed in 1872. The latter scheme was […]
Publiceringsdatum
Författare
TAPIO S. KATKO
Nyckelord (Keyword)
water supply, wooden pipes, pipe drilling, water cooperatives, evolution, history, Finland.
Nummer
3
Årgång
53
Utgåva
Activated sludge is a complex ecosystem consisting of bacteria, protozoa, yeast and virus. Because bacteria are such a large and important component of activated sludge floes, bacterial adhesion is a crucial mechanism of the flocculation. We have studied how electrostatical interactions influence floe stability and sedimentation in water with different ionic composition. Changes in floe […]
Publiceringsdatum
Författare
ANNA ZITA och MALTE HERMANSSON
Nyckelord (Keyword)
activated sludge, flocculation, bacterial adhesion, hydrophobicity.
Nummer
3
Årgång
53
Utgåva
Segmented flow extraction has been applied to studies of the n-octanol/water partition of aquatic humus. This material is a heterogeneous mixture of compounds many of which have surfactant properties complicating the studies. The segmented flow extraction method is proved to be a simple and useful tool for screening the lipophilicity of humus thereby aiding in […]
Publiceringsdatum
Författare
YU-HUI ZHANG and LARS-GÖRAN DANIELSSON
Nyckelord (Keyword)
H-octanol, partition constant (coefficient), humic substance, humus, segmented flow extraction
Nummer
3
Årgång
53
Utgåva
Lake and reservoir eutrophication is a complex process involving a variety of factors which are difficult to act upon simultaneously. The process is triggered off and perpetuated by nutriment inputs from the drainage basin. These may come into play at a later stage however, when the water body stratifies thermally in the summer, cau-sing phosphorus […]
Publiceringsdatum
Författare
ERIK GONAY and MICHEL LAFFORGUE
Nyckelord (Keyword)
Eutrophication, lake, aeration.
Nummer
3
Årgång
53
Utgåva
Lake Vänern is an oligotrophic lake today, but in the northeast part of the lake there are three shallow bays (Ölmeviken, Varnumsviken and Kolstrandsviken) where some heavy blooms with cyanobacteria, occurred during the last ten years. In this article, the blooms and relations to the water quality and the phosphorous loads are reported and discussed. […]
Publiceringsdatum
Författare
STEFAN JOHANSSON
Nyckelord (Keyword)
Lake Vänern, cyanobacteria, algal blooms, water quality, phosphorus load, nutriant removal, waste water, nitrogen reduction
Nummer
4
Årgång
53
Utgåva
The paper suggests a reciprocity between the landscape and the water cycle. Different processor properties of the water cycle dominate in different landscapes, mainly dependent on the vegetation cover and degree of ecological development. Satellite images and geographic information systems are used for recognising pattern similarities between the water cycle and the landscape. A new […]
Publiceringsdatum
Författare
THOMAS GUMBRICHT
Nyckelord (Keyword)
Landscape hydrology, modelling, geoinformatics, Cyprus
Nummer
4
Årgång
53
Utgåva
The presence of pesticides in the aquatic environment represents a potential threat to water quality and human health. Relatively soluble herbicides, such as the chlorphenoxy acids and triazines, applied in agriculture can reach drinking water sources. These herbicides show marked seasonal variations in concentration and have a longer residence time in groundwater and surface water […]
Publiceringsdatum
Författare
ÅSA EDELL and GREGORY M. MORRISON
Nyckelord (Keyword)
Pesticides, water quality directives, activated carbon.
Nummer
4
Årgång
53
Utgåva
A strategy for the sampling, analysis and biological assessment of sediments contaminated from a variety of sources in urban areas, such as industry and surface run off is suggested for Swedish conditions. The strategy is suitable for an initial assessment of chemical content, bio-availability, genotoxicity and the persistence of known persistent pollutants. The strategy includes […]
Publiceringsdatum
Författare
MARIA TARKPEA
Nyckelord (Keyword)
sediments, risk assessment, bioavailability, metals, organic pollutants
Nummer
4
Årgång
53
Utgåva
During the last two decades analyses of microfungi (yeasts and moulds) and actinomycetes have been conducted on drinking water in Sweden. From originally being a pilot study conducted to obtain knowledge of the extent to which these microorganisms can be detected in untreated water and in the distribution network, today the analyses are conducted both […]
Publiceringsdatum
Författare
KERSTIN ÅKERSTRAND
Nyckelord (Keyword)
water, micrfrungi, mould, actinomycetes, Phialophora
Nummer
4
Årgång
53
Utgåva
An investigation of the particle quantity and size distribution, along with the turbidity pattern, has been used to study particle behaviour within the municipal water distribution system of the city of Luleå, Sweden (65 000 consumers). The water source is the Lule River, which has a soft water with a hardness of 20-30 mg/L as […]
Publiceringsdatum
Författare
ILZE ALEREU AND JÖRGEN HANAEUS
Nyckelord (Keyword)
distribution network, drinking water, water quality, particles, particle composition, particle counter, turbidity.
Nummer
4
Årgång
53
Utgåva
Aerobically digested mixed biological and aluminium precipitated sludge with an initial total solids content of ca 5 % was tested on 5 pilot sand drying beds indoors. The test run continued for 84 days in a controlled environment, with a relative humidity of 30—40 % and a temperature of 24-27°C. The results showed that: — […]
Publiceringsdatum
Författare
STEFAN MARKLUND
Nyckelord (Keyword)
drying beds, sludge drying, wastewater sludge, air drying
Nummer
4
Årgång
53
Utgåva
Routine cleaning of water mains is commonly employed by water utilities around the world as a proactive means of managing common water quality issues. When employed correctly, mains cleaning can be effective in removing loosely deposited sediments that can cause water discolouration. Despite its long history in the water industry, water supply practitioners continue to […]
Publiceringsdatum
Författare
Sandra Kjellberg, Asoka Jayaratne, Jan Vreeburg,
Nishal Sukumaran, Jasper Verberk
Nyckelord (Keyword)
Customer complaints, discolouration, turbidity, Resuspension Potential Method, mains cleaning program, sediment
Nummer
4
Årgång
63
Utgåva
Water supply in Växjö municipality has since 1887 been based on surface water from Helga lake. A water treatment plant was built in 1957 and was extensively reconstructed in 1969 but there are still problems to accomplish with drinking water quality, mainly related to temperature, smell and taste, managanese and aluminum rest. Present water consumption […]
Publiceringsdatum
Författare
Nasik al-Najjar
Nyckelord (Keyword)
Ground water, infiltration, water supply, water treatment, Växjö municipality
Nummer
4
Årgång
63
Utgåva
Lake Østensjøvannet is a shallow hypertrophic lake situated about 30 km south of Oslo. The water quality in the lake during the last hundred years has deteriorated greatly. The main reason for this is supply of wastewater and drainage from agricultural activities. Investigations in the summers of 1977 and 1978 indicated very high internal phosphorus […]
Publiceringsdatum
Författare
Olav Grøterud & Ståle Haaland
Nyckelord (Keyword)
Photosynthesis, blue-green bacteria, high pH, lake sediments, phosphorus release, resuspension
Nummer
4
Årgång
63
Utgåva
The demand for water increases with population and economic growth. Water that in many cases not is available. Reclaimed water for irrigation has been used for a long time, but in urban areas with water scarcity, advanced treated wastewater has now become an alternative for production of potable water. Extreme situations demand ingenious solutions, solutions […]
Publiceringsdatum
Författare
LENA FLYBORG och KENNETH M PERSSON
Nyckelord (Keyword)
Multiple barriers, indirect, direct, planned water reuse
Nummer
4
Årgång
63
Utgåva
Författarna drar en slutsats att kraven i EG:s ramdirektiv för vatten, som det genomförts i Sverige, inte är rimliga. Slutsatsen är baserad på en rad felaktiga antaganden. Författarna bortser mer eller mindre från den kommande samverkansprocess som föregår de viktigare besluten inom vattenförvaltningen. De bortser även från de möjligheter till undantag från kravet på god […]
Publiceringsdatum
Författare
Kerstin Rosén Nilsson
Nummer
4
Årgång
63
Utgåva
Publiceringsdatum
Författare
Rikard Lidén
Nummer
4
Årgång
63
Utgåva
Simultaneous suspended solids separation, denitrification, and phosphorus precipitation in a down-flow filter were studied as a final process step at Henriksdal treatment plant. The research was performed in a stainless steel tube with a diameter of 0.4 metre filled with sand of different grain sizes and layer heights over a layer with expanded clay. The […]
Publiceringsdatum
Författare
LENAJONSSON
Nyckelord (Keyword)
deep-bed filters, wastewater, denitrification, phosphorus precipitation, acetate, nutrient removal,
ferrous sulphate, ferric chloride, clogging.
Nummer
1
Årgång
53
Utgåva
Many possibilities are available to improve the efficiency of the activated sludge process and to decrease the necessary volume needs. Examples include the use of dosage of weighting agents and seeding of nitrification bacteria to the activated sludge process. Simple models were developed in order to predict the effects of these methods. One model was […]
Publiceringsdatum
Författare
PUHUA LI and BENGT HULTMAN
Nyckelord (Keyword)
activated sludge, nitrification, sedimentation, seeding, weighting agents.
Nummer
1
Årgång
53
Utgåva
This paper describes the design and operation of a novel pilot-scale activated sludge plant located at the main municipal wastewater treatment plant in Uppsala, Sweden. The pilot plant consists oftwo separate lines for predenitrification. The main purpose of the plant has been to study new methods for efficient nutrient removal using advanced process technology, applied […]
Publiceringsdatum
Författare
BENGT CARLSSON, SERENA HASSELBLAD, ELZBIETA PLAZA, STEFAN MARTENSSON2 and CARL-FREDRIK LINDBERG
Nyckelord (Keyword)
activated sludge process, automation, instrumentation, nutrient removal, control, operation, supervision, pilot scale plant, wastewater treatment.
Nummer
1
Årgång
53
Utgåva
Nitrifying trickling filters (NTFs) have attained renewed attention due to increasing demands on nitrogen re moval in municipal waste-water treatment. For improved control of wastewater treatment plants (WWFPs), using NTFs, models of the filters are almost indispensable. Furthermore, models may be used to improve the understanding of the process and for studying new operational strategies […]
Publiceringsdatum
Författare
TORSTEN WIK
Nyckelord (Keyword)
biofilm, control, dynamics, diffusion, experiments, model, nitrification, residence time distribution, wastewater.
Nummer
1
Årgång
53
Utgåva
Long-term effects of dissolved (DO) concentration on the settling properties of activated sludge were studied in continuous completely-mixed pilot-plant reactors. Lower DO concentrations (0.5-2.0 mg/1) gave poorer settling properties and higher turbidities of the effluent than higher DO concentrations (2.0-5.0 mg/1). The main reasons to the deteriorated settling properties were excessive growth of filamentous bacteria […]
Publiceringsdatum
Författare
BRITT-MARIE WILLEN and PETER BALMER
Nyckelord (Keyword)
wastewater, activated sludge, settling, dissolved oxygen concentration, floc size distribution, settling properties, filamentous microorganisms
Nummer
1
Årgång
53
Utgåva
Two pilot plant set-ups, used to obtain information on a denitrifying non-nitrifying activated sludge system and its usefulness in full-scale, are compared and evaluated. The pilot plant data are used to illustrate effects of simplification of a complex problem in pilot scale. A simple pilot plant supplied with a constant How of wastewater was useful […]
Publiceringsdatum
Författare
ANN MATTSSON
Nyckelord (Keyword)
denitrification, activated sludge, pilot plant, experimental technique, wastewater treatment
Nummer
1
Årgång
53
Utgåva
Studies on enhanced biological phosphorus removal (EBPR) in activated sludge processes have been conducted on a pilot plant at the Sjolunda wastewater treatment plant in Maimo, Sweden, since 1986. The plant receives wastewater from a combined sewer system. The aim of this study was to investigate the consequences of combining EBPR with biological nitrogen removal, […]
Publiceringsdatum
Författare
HANS CARLSSON, HENRIK ASPEGREN, BENGT ANDERSSON and ANDERS HILMER
Nyckelord (Keyword)
biological phosphorus removal, denitrification, wastewater characterisation
Nummer
1
Årgång
53
Utgåva
As part of the Swedish research program STAMP (Swedish abbreviation for Control ofWastewater Treatment Plants – Method and Processes) funded by the Swedish National Board for Technical Development, three Ph.D.-students at the Department of Biotechnology, Lund University, have been working with applied research in close collaboration with other University departments and with local full scale […]
Publiceringsdatum
Författare
MAGNUS CHRISTENSSON och THOMAS WELANDER
Nyckelord (Keyword)
Enhanced biological phosphorus removal (EBPR); Full scale treatment plant; Laborative model study; VFA-potential; sludge community.
Nummer
1
Årgång
53
Utgåva
The main objective of the paper is to briefly describe and exemplify some of the work that has been carried out within the STAMP project at IEA at Lund Institute of Technology within the field of mathematical modeling of wastewater treatment (WWT) processes. Three main areas have been identified – reduced-order models of the activated […]
Publiceringsdatum
Författare
ULF JEPPSSON
Nyckelord (Keyword)
activated sludge, biofilm, mathematical modelling, model reduction, parameter estimation, protozoa, secondary clarifier, sedimentation, simulation, solids flux.
Nummer
1
Årgång
53
Utgåva
This paper presents the results of using mass balance calculations for the sludge transport to a secondary sedimentation tank after an activated sludge process with high sludge concentration. An activated sludge process with nitrogen removal often have high sludge concentration and a sludge with sludge settling characteristics. These factors give high sludge load on the […]
Publiceringsdatum
Författare
MAGNUS EMANUELSSON och BERNDT BJÖRLENIUS
Nyckelord (Keyword)
Sedimentation, Mass-Balance, Nitrogen removal, Clarification, Thickening, Field Study.
Nummer
1
Årgång
53
Utgåva
Ships, especially huge car-ferries, cause shore erosion and influence the littoral benthic communities along the archipelago routes between Sweden and Finland. Less is known about effects on pelagic communities (phytoplankton). Some effects of ships waves and currents were studied in the Mariehamn ferry harbour area, southern Åland (N. Baltic Sea) in the summer of 1996. […]
Publiceringsdatum
Författare
TORE LINDHOLM
Nyckelord (Keyword)
phytoplankton, red tide, bloom, fairway, eutrophication, Baltic Sea
Nummer
2
Årgång
53
Utgåva
Water purification with membrane technology was investigated as one of the alternatives for the rurure drinking water production (6,000 m^/d) in Nynäshamn community. The selected raw water source was surface water from Lake Muskan rather than brackish water from the Baltic Sea. The lake water, without need for desalination, has a high colour number (up […]
Publiceringsdatum
Författare
BERNT ERICSSON, och JAN WACHENFELDT
Nyckelord (Keyword)
surface water, colour removal, humic substances, membrane filtration, nanofiltration, conventional treatment,activated carbon, reject treatment/disposal, irrigation
Nummer
2
Årgång
53
Utgåva
In recent years, reconstructing municipal water distribution systems and optimizing their operate conditions have become important tasks in Latvia. Such work requires knowledge of the water balance within water distribution systems to make further decisions. Recorded statistics indicate high domestic water consumption per capita while consumers complain of frequent water shortages at their taps. Different […]
Publiceringsdatum
Författare
ILZE ALERE
Nyckelord (Keyword)
water consumption, Latvia, drinking water, water losses
Nummer
2
Årgång
53
Utgåva
The area served by Anglian Water is one of intensive arable agriculture, leading to many of it’s sources of drinking water exceeding EU Maximum Acceptable Concentrations of nitrate and pesticides before treatment. Concentrations and trends in surface and groundwaters are discussed in the light of recent developments in UK agriculture and legislation. Methods are available […]
Publiceringsdatum
Författare
BRIAN CROLL
Nyckelord (Keyword)
Groundwater, Surface Water, Nitrate. Pesticides. Herbicides, Water treatment. Water Resources
Nummer
2
Årgång
53
Utgåva
Publiceringsdatum
Författare
Berndt Björlenius
Nyckelord (Keyword)
Operation schedule, strategies, WWTP
Nummer
3
Årgång
52
Utgåva
Publiceringsdatum
Författare
Sara Hallin, Mikael Pell
Nyckelord (Keyword)
Acetylene inhibition, activated sludge, bacteria, denitrification, denitrifying capacity, ethanol, nitrogen removal, methanol
Nummer
3
Årgång
52
Utgåva
Publiceringsdatum
Författare
Björn Sandén, Camilla Grunditz, Gunnel Dalhammar, Berndt Björlenius
Nyckelord (Keyword)
Nitrification,Nitrobacter, enumeration, influent, monoclonal antibodies, MPN, mass balance
Nummer
3
Årgång
52
Utgåva
Publiceringsdatum
Författare
Daniel Hellström adn Elisabeth Kvarnström
Nyckelord (Keyword)
natural sludge dewatering, combined freezing and drying, northern Sweden, cold climate engineering
Nummer
4
Årgång
52
Utgåva
Publiceringsdatum
Författare
Henrik aspegren, Ulf Nyberg and Bengt Andersson
Nyckelord (Keyword)
wastewater, stormwater, wastewater treatment, combined sewers, control, real time control, RTC
Nummer
4
Årgång
52
Utgåva
Publiceringsdatum
Författare
Åsa Hanaeus, Daniel Hellström and Erica Johansson
Nyckelord (Keyword)
Human urine, storage, nitrogen, urea, ammonia, pH
Nummer
4
Årgång
52
Utgåva
Publiceringsdatum
Författare
Sven-Göran Bergh
Nyckelord (Keyword)
early warning systems, hydraulics, hydraulic impact, rule based diagnosis, return sludge control, risk analysis, settleability, settling properties
Nummer
4
Årgång
52
Utgåva
Publiceringsdatum
Författare
Camilla Grunditz, Lena Gumaelius och Gunnel Dalhammar
Nyckelord (Keyword)
Nitrification inhibition, denitrification inhibition, pure culture assays, industrial wastewater
Nummer
4
Årgång
52
Utgåva
Publiceringsdatum
Författare
Gunnar Guzikowski och Tore Stenström
Nyckelord (Keyword)
Sweden, drinking water, rules, disinfection, by-products, waterworks
Nummer
4
Årgång
52
Utgåva
Publiceringsdatum
Författare
Lena Ranhagen, Jorma Kuivinen, Tore Stenström och Bitte Erlandsson
Nyckelord (Keyword)
trihalomethanes, THM, COD, Sweden, Drinking water, Chlorine dosage, survey, headspace analysis, capillary GC
Nummer
4
Årgång
52
Utgåva
Publiceringsdatum
Författare
Tore Stenström och Eva Sandberg
Nyckelord (Keyword)
Literature survey, health effetcs, disinfection, by-products, THM, trihalomehtanes, bromodichloromethane
Nummer
4
Årgång
52
Utgåva
Publiceringsdatum
Författare
Janusz Niemczynowicz
Nyckelord (Keyword)
water management, resource management,sustainability, water availability, water use, wastewater, sanitation, new technology, system solutions, cross-sectoral interactions
Nummer
4
Årgång
52
Utgåva
Separate nitrification of the reject water from dewatering of digested sludge has been studied at the Bromma sewage plant in Stockholm. Experimental studies were carried out in an SBR pilot plant. It was shown that a very high nitrification rate could be obtained in the reactor, about 30-40 g NH^-N/kg MLVSS, h. During the nitrification […]
Publiceringsdatum
Författare
AGNES MOSSAKOWSKA, LARS-GUNNAR REINIUS, and
BENGT HULTMAN,
Nyckelord (Keyword)
activated sludge, diffusion, dinitrogen oxide, multivariate methodology, nitrification, reject water, Sequencing Batch Reactor.
Nummer
1
Årgång
53
Utgåva
The arguments for and against nitrogen removal have been penetrated. Special attention has been taken to the report by the panel of experts Naturvårdsverket (the Swedish Environmental Protection Board) has ordered. None of the arguments for nitrogen removal have been found to be valid for either Baltic Sea or the west coast.Bothnian Sea can be […]
Publiceringsdatum
Författare
Thomas Hellström
Nyckelord (Keyword)
Nitrogen, algae, Baltic sea, Kattegat, bluegreen algae, predictions
Sammanfattning
Nummer
3
Årgång
63
Utgåva
Since January 1, 2006, new legislation from the European Union (among others; regulations EC 852/2004 and EC 882/2004) forces all food producers of the EU to include a hazard analysis based on the HACCP-principles in their internal control. HACCP (Hazard Analysis and Critical Control Point) is an international standard operated by the Codex Alimentarius Commission […]
Publiceringsdatum
Författare
Anna Järvegren Meijer, Kenneth M Persson, Anne Levin och Erling Midlöv
Nyckelord (Keyword)
HACCP, CCP, critical control point, drinking water, waterworks, risk analysis, ranking, consequence,
frequency, value matrix
Nummer
3
Årgång
63
Utgåva
River Vegeå drains parts of the agricultural lands in Southern Sweden. A preliminary characterisation of the water in Vegeå has been made using the guidelines developed in accordance with the Water Framework Directive.The work indicates that the guidelines are difficult to apply due to lack of data, which may cause a risk that the characterisation […]
Publiceringsdatum
Författare
Rikard Lidén, Lisa Förlin och Olof Persson
Nyckelord (Keyword)
EU Water Framework Directive, Characterisation, Sweden
Nummer
3
Årgång
63
Utgåva
The EU Water Framework directive requires planning on river basin basis. Different means affect different basins in different ways. In this study it is shown how small basins can be characterized and how a problem analysis can be done with respect to water requirement, water quality, land use and concentrated activities. Effects of separate means […]
Publiceringsdatum
Författare
JUSTYNA CZEMIEL BERNDTSSON och LARS BENGTSSON
Nyckelord (Keyword)
small river basins, river water quality, low and high flows, point and non-point discharges, heavy metals, nutrients
Nummer
3
Årgång
63
Utgåva
Constructed wetlands (CWs) and filterbeds are used throughout the world to treat wastewater. For these systems, selection of a suitable filter material for P sorption is essential, as well as design criteria that enables an efficient treatment. Batch experiments have been the main tool for obtaining maximum P sorption capacities for potential filter materials. They […]
Publiceringsdatum
Författare
Kinga Ádám, Anne Kristine Søvik , Tore Krogstad and Arve Heistad
Nyckelord (Keyword)
Batch experiments, column studies, constructed wetlands, Filtralite P®, Light-weight aggregate (LWA), on-site studies, optimal design, phosphorus, shellsand, sorption
Nummer
3
Årgång
63
Utgåva
Ledare, I blickpunkten, Föreningsmeddelanden, Litteratur, Konferenser, Företagsinformation och Pressreleaser.
Publiceringsdatum
Nummer
3
Årgång
63
Utgåva
Ledare, I blickpunkten, Föreningsmeddelanden, Litteratur, Konferenser, Företagsinformation och Pressreleaser.
Publiceringsdatum
Nummer
4
Årgång
63
Utgåva
Publiceringsdatum
Författare
Erik Norin, Thor Axel Stenström, Ann Albihn
Nyckelord (Keyword)
aerobic thermophilic sludge treatment, ammonia, bacteria, bacteriophage, blackwater, disinfection, heat indicator organism
Nummer
3
Årgång
52
Utgåva
Publiceringsdatum
Författare
Hans Holmström, Christina Liljeqvist
Nyckelord (Keyword)
Fire fighting foams, wastewater, nitrification, inhibition
Nummer
3
Årgång
52
Utgåva
Publiceringsdatum
Författare
Magnus Emanuelsson
Nyckelord (Keyword)
Sedimentation, Solid Flux theory, Nitrogen removal, Clarification, Thickening, Field method
Nummer
3
Årgång
52
Utgåva
Publiceringsdatum
Författare
Thomas Hellström
Nyckelord (Keyword)
algal pond, nutrient recycling, wastewater, microfiltration, chemical precipitation
Nummer
3
Årgång
52
Utgåva
Publiceringsdatum
Författare
Andreas Björklund, Stefan Mattsson and Gunnar Karlsson
Nyckelord (Keyword)
Citrates, phosphates, zeolites, builders, detergents
Nummer
3
Årgång
52
Utgåva
To create a Local Agenda 21-process, is a very challenging task, which requires knowledge, political will, and political clout. The experience that we hitherto have in Sweden, shows the importance of commitment to the work, within as well the political as the administrarive leadership in the municipalky. Water is, in many ways, an inregrating factor […]
Publiceringsdatum
Författare
PEDER HJORTH
Nyckelord (Keyword)
Vatten, naturresurser, bärkraftig urveckling, kommunal planering, vattenförsörjning, avlopp, avfall, integration, koordination, konsultation
Nummer
4
Årgång
51
Utgåva
Many phytoplankton species are notoriously motile, fragile, difficult to preserve, and difficult to identify in preserved samples. Microscopical examinadon ofliving phytoplankton material has several advamages, though it often demands great patience. Species identification is easier and it is possible to observe e.g. life cycle, pigmentation, motility, particle uptake and some food web relationships. Rare, fragile […]
Publiceringsdatum
Författare
TORE LINDHOLM and PETRA ÖHMAN
Nyckelord (Keyword)
phytoplankton, flagellates, Balric Sea, methods
Nummer
1
Årgång
52
Utgåva
Many attempts have been made and are under investigarion in order to create artificial-life. Farfetched experiments have been piloted based on classical electro-mechanical and dynamical iheories. Yet none have revealed any sign of life emerging from lifeless matter. On the contrary, life through the interference of water always evolve from life.By interweaving known theories a […]
Publiceringsdatum
Författare
BJÖRN D. BERG
Nyckelord (Keyword)
potential work, communication, life, water
Nummer
1
Årgång
52
Utgåva
In order to study the possible contamination of drinking water supplies with pesticides, the National Food Administration carried out an invesrigarion in 33 water supplies during 1992-94. Sampling was done both in surface and ground warer supplies. Pesticide residues were found in three ground water supplies on all seven occasions and in one surface water […]
Publiceringsdatum
Författare
EVA SANDBERG
Nyckelord (Keyword)
pesticides, water supplies, drinking water
Nummer
1
Årgång
52
Utgåva
Biological nutriem removal by means of the SBR technology has become acknowledged also in Europe during the last few years, after its breakthrough in the US and Japan some 10 years ago.This paper presents the performance of three modern SBR plants in Europe, all operated for advanced removal of BOD, total N and P. The […]
Publiceringsdatum
Författare
STIG MORLING
Nyckelord (Keyword)
SBR technology, nitrogen, phosphorus, biological nutrient removal
Nummer
1
Årgång
52
Utgåva
During the waste water process, coagulants are used to remove phosphorus and BOD and to stabilise the process. The coagulants will accumulate in the sludge mainly as metal phosphates and a minor portion as metal hydroxides. These elements will influence the behaviour of the sludge when it is disposed of on agricultural land.The availability of […]
Publiceringsdatum
Författare
BENGT HANSSON
Nyckelord (Keyword)
sewage sludge, coagulant‘s, phosphorus, plant uptake, soil structure
Nummer
1
Årgång
52
Utgåva
The environmental problem with water treatment sludge is small, but utilisation of the sludge for production of aluminous cement may reduce the problems, since any environmental hazardous contaminants is bound as mineral to the building material and mining of raw material for cement production is reduced. Compression strength were measured after different hydration lime on […]
Publiceringsdatum
Författare
VLADLEN LUBARSKI
Nyckelord (Keyword)
environment, water treatment sludge, hydroxide sludge, aluminous cement
Nummer
1
Årgång
52
Utgåva
An estimation of the magnitude of future mean high water levels in Oresund and the south-west Baltic Sea is presenred together with a brief discussion of probable causes and consequences. The data material used is based on sea-level measuremenrs and observations made during the last 50 years by the bascule- bridge watch guard in the […]
Publiceringsdatum
Författare
STEN BLOMGREN och HANS HANSON
Nyckelord (Keyword)
Beach Erosion, Climate Change, Greenhouse Effect, Sea-level Rise
Nummer
2
Årgång
52
Utgåva
To optimize the alkaline leaching technique for quanufication of biogenic silica in marine sediments, different pretreatment methods were evaluated. Marine sedimenrs were pretreated with fumes of concenrrated hydrochloric acid, hydrochloric acid solutions or/and hydrogen peroxlde prior to extracrion of biogenic silica. The acid pretrearment removes carbonates and meral oxides coaung the biogenic silica surface, which […]
Publiceringsdatum
Författare
ANGELA LANDÉN, OLA HOLBY and PER O. J. HALL
Nyckelord (Keyword)
Biogenic silica, marine sedimenrs, determination, pretreatment, sample size
Nummer
2
Årgång
52
Utgåva
This paper presents the results of a study on blockages in sewer pipes in 10 Swedish municipalities. The blockage rate has been studied over a ten year period. There was no trend of increase or decrease of the blockage rate over the studied period. The blockage rare was found ro be higher in the periodjanuary […]
Publiceringsdatum
Författare
VIVEKA LIDSTRÖM
Nyckelord (Keyword)
Blockage, sewer, maintenance
Nummer
2
Årgång
52
Utgåva
The research program STAMP (Control and Operacion ofWastewater Trearment Plants – New Merhods and New Process Technology) was introduced by NUTEK in the year of 1991. In the consortium of Stockholm a close cooperarion has been esrablished between Stockholm Water Ltd. and two departments of Royal Institute Technology. Those are Dept. of Warer Resources Engineering […]
Publiceringsdatum
Författare
FREDRIK GÖHLE and BERNDT BJÖRLENIUS
Nyckelord (Keyword)
Activaied sludge, control strategy, EFOR, sedimemarion, setpoint, simulation, sludge blanket, solids flux, sludge thickening, wastewater
Nummer
2
Årgång
52
Utgåva
A method for the determination of inhibitory effects of chemicals and waste waters on the nitrification processis presented. The method uses pure cultures of microorganisms, which are immobilized on an alginate carrier. The nitrification rate of the test subsrance or waste water, with a maximum concentradon of 90 vol%, is measured during a period of […]
Publiceringsdatum
Författare
MIKAEL KARLSSON, JURGEN MÖLLER
Nyckelord (Keyword)
Inhibition ofnitrificarion, Pure culture ofmicroorganisms, immobilized microorganisms
Nummer
2
Årgång
52
Utgåva
The waste water treatment plant in Ölmanäs, Kungsbacka, Sweden has been enlarged by means of two SBR basins in order to meet more stringent effluent standards with respect to total nitrogen. The plant has been designed for an equivalent capacity of 11 000 inhabkants. The rebuih plant has been operation since the fall of l993. […]
Publiceringsdatum
Författare
Stig Morling, Annika Nyberg
Nyckelord (Keyword)
Sequencing Barch Reacror, Biological niirogen removal, Biological phosphorous removal
Nummer
2
Årgång
52
Utgåva
Publiceringsdatum
Författare
Lisa Herland, Anna Lövsén
Nyckelord (Keyword)
China, Guang Dong, Nan Hai, Nan Zhung, Pearl River Delta, fish pond, water supply, satewater treatment
Nummer
2
Årgång
52
Utgåva
Publiceringsdatum
Författare
Bosse Norrman and Rutger Rosenberg
Nyckelord (Keyword)
epizoon, fish, Skagerrak
Nummer
3
Årgång
52
Utgåva
The sludge treatment system at Oresundsverket in Helsingborg has been invesrigated primarily in order to assess the amounts of nitrogen and phosphorus that are recirculated within the wasrewater trearment plant. Through mass balances, it was possible to calculate the amount of recirculated phosphorus to jusi over 20 % elated to the inflow, and the amounr […]
Publiceringsdatum
Författare
KARIN JÖNSSON
Nyckelord (Keyword)
waste water, sludge treatment, mass balances, nitrogen, phosphorus, suspended solids, recirculation.
Nummer
1
Årgång
51
Utgåva
The uncontrolled developmenr ihar has taken place in Thailand during the last decade has caused considerable damage to the environment and ro freshwater resources. The governance is suffering from a severe technological fix and has not fully internalised the imporcance of an adequate institutional framework for a sustainable magement of natural resources. There is also […]
Publiceringsdatum
Författare
PEDER HJORTH
Nyckelord (Keyword)
Thailand, water resources, technology management, capacity building
Nummer
1
Årgång
51
Utgåva
Vattenburna sjukdomsutbrott förekommer i de nordiska länderna, ofta beroende på tillfälliga tekniska felakatigheter eller brist på skyddsåtgärder. Under perioden 1975-1991 inträfFade cirka 140 kända utbrott i allmänna ch enskilda system. För framtiden är en framförhållning viktig, både gällande rradirionella agens sami för nyuptäckta arter. Organismer som förekommer som del av vattnets normalflora kan här komma […]
Publiceringsdatum
Författare
THORAXEL STENSTRÖM
Nummer
1
Årgång
51
Utgåva
Publiceringsdatum
Författare
Gunnar Jacks och Christina Frycklund
Nyckelord (Keyword)
groundwater, infiltration, organic matter retention
Nummer
1
Årgång
51
Utgåva
Phytoplankton estimation and biomass determination are routine procedures in many lake monitoring i programmes, but there are often methodical difterences in the way the different investigators perform these analyses. We present here the results from a Danish inrercalibration on phytoplankton investigations in lakes. The aim was to assess the uncertainty in connection with phytoplankton investigations […]
Publiceringsdatum
Författare
JENS PEDERJENSEN, MÄRTIN S0NDERGAARD, GERTRUD CRONBERG, and J0RGEN KRISTIANSEN
Nyckelord (Keyword)
phytoplankton, intercalibrarion, lake monitoring, biomass, blue-green algae, ultrasound, sonication.
Nummer
2
Årgång
51
Utgåva
A constructed wetland (30 ha) for reduction ofphosphorus and nitrogen has been creaced in connecrion to the effluent from the sewage treatment plant in the town of Hässleholm, Scania, southern Sweden. The supply of phosphorus to the wetland is calculated to be reduced by 50 %. The main phosphorus-redudng process will be uptake by macrophytes […]
Publiceringsdatum
Författare
HELÉNE ANNADOTTER, PER-ÅKE NILSSON, BEJRON LUNDSTEDT och SVEN STRÖBÄCK
Nyckelord (Keyword)
phosphorus reduction, nitrogen reduction, wedand, sewage treatment
Nummer
2
Årgång
51
Utgåva
There is a great amount of chemicals in common use which are not adequately tested for their toxicity to aquatic animals. This is pardy due to the fact that tradiiional toxicity tests on animals are time consuming and expensive. Toxicity tests on higher animals are also erhically questionable and one can also quesdon the informative […]
Publiceringsdatum
Författare
BORIS ISOMAA och HENRIK LILIUS
Nummer
2
Årgång
51
Utgåva
This work is based on data collected in the Liming-mercury-cesium project, and is, as far as the authors are aware, the most extensive set of dara collected to evaluate the eutrophication effecrs associated with fish farms in Swedish lakes. The hypothesis to test is whether fish farms raise lake phosphorus concentrations and thereby the production. […]
Publiceringsdatum
Författare
LARS HÅKANSON, LENNART CARLSSON och TORBJÖRN JOHANSSON
Nyckelord (Keyword)
lakes, fish farms, eutrophicanon, mass-balances
Nummer
2
Årgång
51
Utgåva
The hypothesis tested in this work is that there is a significant direct uptake of phosphorus (from faeces from the culrivared fish and feed loss) from fish farms leading to increased growth ofwild fish. Direct uptake (DU) is defined as the phosphorus bound in wild fish. DU is associated with the growth ofall types ofwild […]
Publiceringsdatum
Författare
KRISTIAN BORUM, TORBJÖRN JOHANSSON och LARS HÅKANSON
Nyckelord (Keyword)
lakes, fish farms, eutrophicanon, wild fish, direct uptake, particle experiment
Nummer
2
Årgång
51
Utgåva
THE EFFECT OF A pH-ADJUSTMENT COMBINED WITH THERMAL PRE-TREATMENT ON THE DEWATERlNG OF SEWAGE SLUDGE
It is invesdgated whether heat-treatment combined with pH-adjustmenr improves the dewatering characteristics of sewage sludge. The treatment is done in order to secure hygienisated sludge by which the manuring and earth-improving effect of the sludge can be utilized in agriculture without any precautions in the case of a fullscale sewage plant. Furthermore fihrate from the […]
Publiceringsdatum
Författare
ROALD THOR J0RGENSEN, STIG RASMUSSEN and MOGENS HENZE
Nyckelord (Keyword)
activated sludge, heat-treatment, filtrate as carbon source
Nummer
2
Årgång
51
Utgåva
The copper corrosion in the distrubution net ofdrinking waters with high hardness and high alcalinity, i.e. an aggressive water, poses a problem in the sewage water treatments planrs due to a high content of copper in the sludge.Correct pH and carbondioxide content will reduce the aggressiveness of the water and heavily reduce the copper corrosion. […]
Publiceringsdatum
Författare
BENGT JONSSON
Nummer
2
Årgång
51
Utgåva
This work presents results from a sedimentological investigation of Lake Södra Bullaren, Sweden, and a budget suspended matter for the lake. The basic question concerns the spread offeed wastes and faeces from a fish farm. Where do these emissions appear? Are they large in comparison to other fluxes of marerial causing increase in total-phosphorus-concentrations and […]
Publiceringsdatum
Författare
LARS HÅKANSON och JOHAN PERSSON
Nyckelord (Keyword)
lakes, fish farms, emissions, phosphorus, sediments, suspended matter, budgets.
Nummer
3
Årgång
51
Utgåva
The main purpose of this work is to introduce the LEEDS-model (Lake Eurrophication, EfFect-Dose-icnsitivity-model) using a case srudy for Lake S. Bullaren, Sweden. This lake has been the focus of an agitated debate because there is a fish cage farm for rainbow trout in the lake, which has been accused of “ruining“ the lake. LEEDS […]
Publiceringsdatum
Författare
LARS HÅKANSON och LENNART CARLSSON
Nyckelord (Keyword)
Lakes, phosphorus, primary production, eurrophicadon, model, fish farms, effect-dose-sensitvity-analysis, calibration, simulation
Nummer
3
Årgång
51
Utgåva
A GIS-based database for PC-use in a MS-Windows environment has been developed in order to ger a clear piciure of the present status of problems and information handling on coastal erosion problems in nine communities in southern Sweden (Båstad, Angelholm, Helsingborg, Lomma, Vellinge, Trelleborg, Skurup, Ystad and Simrishamn) coupled with actual remedial measures taken. Since […]
Publiceringsdatum
Författare
STEN BLOMGREN och HANS HANSON
Nyckelord (Keyword)
GIS, Beach Erosion, Skåne
Nummer
3
Årgång
51
Utgåva
Aerobic thermofilic digestion (liquid composting) is an autothermal sludge stabilisauon process that normally operates at temperatures higher than 50°C. The process requires electric power for mixing and aeration. Otherwise, the technique is simple and reliable. A treatment plant which is properly designed and operares at high remperature produces a sludge that is stabilized, odourless and […]
Publiceringsdatum
Författare
ERIK NORIN
Nyckelord (Keyword)
aerobic digestion, ammonia, heat, liquid composting, organic wasre, pathogen, recycling, sewage sludge, thermophilic
Nummer
3
Årgång
51
Utgåva
This works presents a critical review of existing models to evaluate eutrophication consequences related ro emissions from fish cage farms in lakes. Existing models ofthe Vollenweider-type, i.e., models based only on formation on tributary input of toial-P and theoretical lake water retention lime (or related lake morphometrical facrors) cannot be used to predict and/or evaluate […]
Publiceringsdatum
Författare
LARS HÅKANSON och TORBJÖRN JOHANSSON
Nyckelord (Keyword)
Lakes, fish farms, eutrophicarion, models, uncertainty tesrs, predictions, mass-balances.
Nummer
4
Årgång
51
Utgåva
This paper presents a new technology for the treatment of humus contaminated river warers, using ferri/flocculation and floating sedimentarions tanks, insralled in a lakewater body, connected to ihe main water resevoire of the Vaasa potable water works, in Finland. The capacity ofthis plant is 1 000 m3/h. It started in the summar 1995. Vaasa water […]
Publiceringsdatum
Författare
RUBEN HERRGÅRD, och KARL DUNKERS,
Nummer
4
Årgång
51
Utgåva
In order to be able to determine wheiher or not a wastewarer treatment method is the best one in a given case, it would be beneficial if the treatment method could be evaluated both with respect to cost efficiency (cost in relation to receiving water improvemenr) as well as sustainability (consumption ofraw materials and energy). […]
Publiceringsdatum
Författare
HALLVARD ÖDEGAARD
Nyckelord (Keyword)
Wastewater treatment, cost efficiency, sustainability.
Nummer
4
Årgång
51
Utgåva
A decisive factor in the operation of an enhanced biological phosphorus removal (EBPR) process is th availability of readily biodegradable organics in the influent. Especially important is the amount of volatile fatty acids, VFA. At the WWTP in Helsingborg, Öresundsverket, full-scale EBPR-tests in two of the four trains are running. Hydrolysis of primary sludge in […]
Publiceringsdatum
Författare
LARS-ERIK JÖNSSON
Nyckelord (Keyword)
VFA, EBPR, analysis procedure, titradon.
Nummer
4
Årgång
51
Utgåva
Anaerobic fixed-film biological processes for wastewater treatment have been used for many years. Still, the influence of the support medium is not fully understood and contradictory statements are often found in the literature. The reason for this is the complexity and variation of the organic material normally found in the wastewater to be treated and […]
Publiceringsdatum
Författare
ERIK SÄRNER
Nyckelord (Keyword)
anaerobic filter, media configurarion, specific surface, media micro-structure
Nummer
4
Årgång
51
Utgåva
The paper summarizes a research investigarion of 51 river basin entities in Sweden. These entities cover about 2/3 of the total land area. A questionnaire was sent to the entities. The member circle is multifold, but the most common combination is composed of representatives from local municipalities, industries and a few authorities. The questionnaire reveals […]
Publiceringsdatum
Författare
JAN-ERIK GUSTAFSSON
Nummer
2
Årgång
50
Utgåva
The Gulf of Bothnia makes about 29 % of the whole water volume of the Baltic Sea. The water exchange between the Baltic Proper and the Gulf is good, which results in a water renewal time of only about 4 to 5 years. This is one of the reasons why there is no lack of […]
Publiceringsdatum
Författare
BERTIL HAKANSSON, PEKKA ALENIUS, och LARS BRYDSTEN
Nummer
3
Årgång
50
Utgåva
The reason(s) to the marked ecological differences berween the Bothnian Bay and Bothnian Sea, and the potential coupling to their different biogeochemistry, is unclear. Lack of simultaneous estimates of ecological parameters with sufficient spatiotemporal sampling frequency in the off-shore environment hampers the understanding of the marine food web in the Gulf of Bothnia. To improve […]
Publiceringsdatum
Författare
JORMA KUPARINEN, KJELL LEONARDSSON, JOHANNA MATTILA, och JOHAN WIKNER
Nummer
3
Årgång
50
Utgåva
Based on the intensive hydrochemical measurements during the Gulf of Bochnia Year 1991, we present descriptions of the regional variations of freshwater and nutrient inputs and hydrographic and nutrient conditions in the basins for this particular year. These data are then used to construct budgets of silicate, inorganic and organic nitrogen and phosphorus for the […]
Publiceringsdatum
Författare
FREDRIK WULFF, MATTI PERTILLÄ, och LARS RAHM
Nummer
3
Årgång
50
Utgåva
The largest point emissions of heavy metals and persistent organic substances in the land area surrounding the Gulf of Bothnia have now been virtually eliminated. Despite this, the environment in this region is not approaching a preindustrial state.Like other regions, the Gulf of Bothnia region is affected by long-range atmospheric transport of persistent organic substances. […]
Publiceringsdatum
Författare
ANDERS GRIMVALL, PER JONSSON, MAGNUS CEDERLÖF, och MIKAEL HILDÉN
Nummer
3
Årgång
50
Utgåva
Tree roots entering sewer pipes is an expensive problem which can lead to serious conflicts of interest beween arborist and sewer companies. A substantial amount of money is spent each year on different meaures to remove the roots after they have grown into pipes. The most frequently used methods to prevent root penetration are designed […]
Publiceringsdatum
Författare
ÖRJAN STÅL och BERIT MATTSSON
Nummer
3
Årgång
50
Utgåva
This paper presents some of the results of a statistical smdy on reported bursts of water pipes in five swedish cities. The study is a part of a continuing project called PUFF, with the objective to develop guidelines for long-term maintenance and renewal of water and sewer pipe systems. The work was carried out by […]
Publiceringsdatum
Författare
ANN-CHRISTIN SUNDAHL
Nummer
3
Årgång
50
Utgåva
Ever since the reconstruction of Öresundsverket in Helsingborg was finished in the beginning of 1992 an extensive and regular sampling from the inflow has been carried out. This work has increased the understanding of what variations affecting the outcome of the waste water treatment. The aim of this article is to how how the characterization […]
Publiceringsdatum
Författare
KARIN JÖNSSON
Nyckelord (Keyword)
waste water, inflow, characterization.
Nummer
3
Årgång
50
Utgåva
The goal of this investigation was to determine a value for the fraction of unbiodegradable particulate oganic material in the influent wastewater at the Sjölunda WWTP. The method selected for this purpose was to operate rwo identical laboratory scale units as aerobic fill and draw activated sludge sysrems. This in order to generate data that […]
Publiceringsdatum
Författare
HANS CARLSSON
Nyckelord (Keyword)
wastewater characterization
Nummer
3
Årgång
50
Utgåva
The blue-green algal species, Anabaena, Aphanizomenon, Microcystis and Planktothrix, that usually dominates algal blooms, are the same species that produce neuroroxin and/or livertoxin. Furthermore, production of lipopolysacharide endotoxin by blue-green algae has been reported. The ecological significance of blue-green algal toxinproduction is unknown. Protection against phytoplankton consuming zooplankton or chemical warfare (in the competition for […]
Publiceringsdatum
Författare
HELÉNE ANNADOTTER och GERTRUD CRONBERG
Nyckelord (Keyword)
Algal bloom, Anabaena, Aphanizomenon, Microcystis, hepatotoxins, neurotoxins, lipopolysaccharide endotoxins, Planktothrix
Nummer
4
Årgång
50
Utgåva
This investigation is a result of a cooperation between the County Council, the Municipalities and the County Administration in the County ot Västerbotten, Sweden. The purpose was to study connections between mercury levels in northern pike (Esox Lucius) and environmental factors. Furthermore changes in time were investigated. A classification system, which can be used to […]
Publiceringsdatum
Författare
PONTUS LUNDBERG och LENNART MATTSSON
Nyckelord (Keyword)
mercury, pike, waterchernistry, limnology.
Nummer
4
Årgång
50
Utgåva
If a high loaded activated sludge process is to be part of a process scheme for nutrient removal anaerobic digestion of the biological sludge has to be considered. However, even when plants are upgraded with a low loaded activated sludge process for nutrient removal anaerobic digestion may be of interest if the energy perspective is […]
Publiceringsdatum
Författare
HENRIK ASPEGREN, BENGT ANDERSSON and ULFNYBERG
Nyckelord (Keyword)
EBPR, anaerobic sludge digestion, biological phosphorus removal, phosphorus circulation, waste-water treatment, sludge treatment
Nummer
4
Årgång
50
Utgåva
Enhanced biologlcal phosphorus removal (EBPR) was studied at the Suomenoja research station in Finland in cooperation with St Petersburg Water and Wastewater Works. The studied process was a mainstream process designed for 10 m3 h-l wkh anaerobic and aerobic units. EBPR proved to be a stable and reliable method that endures organic volumemc loads up […]
Publiceringsdatum
Författare
PIRJO RANTANEN
Nyckelord (Keyword)
enhanced biological phosphorus removal, activated sludge, municipal wastewater, St Petersburg, wastewater treatment.
Nummer
4
Årgång
50
Utgåva
Nitrification and denitrification in activated sludge process will be applied at Kungsängsverket in Uppsala municipality to fulfill future effluent requirements. In order to obtain total nitriflcation, a higher sludge retention time is required than in a conventional activated sludge plant. The highest sludge concentration that can be used is dependent on sludge separation properties and […]
Publiceringsdatum
Nyckelord (Keyword)
activated sludge, sedimentation, sludge blanket, solids flux, SSVI.
Nummer
4
Årgång
50
Utgåva
Through a reconstruction during 1991 Oresundsverker i Helsingborg has been upgraded to a treatmentplant for extensive nitrogen and phosphorus removal. In order to run theese biological processes in the right way, it is important to know what parameters affecting the quality of the pretreated waste water. Furthermore it is important to understand the connection between […]
Publiceringsdatum
Författare
KARIN JÖNSSON
Nyckelord (Keyword)
waste water, pretreatment, hydrolysis, preprecipitation, VFA.
Nummer
4
Årgång
50
Utgåva
Mysterious epidemics among drinking water consumers have been related to mass developments ofporentially toxic blue-green algae (Cyanobacteria) in drinking water reservoirs. Blue-green algae can pass rapid sandfiltraion and activated carbon filtrarion. The blue-green algal toxin microcystin has been detected in drinking water after treatment with rapid sand filtrarion/chlorination; rapid sand filtradon/flocculation and after activated carbon […]
Publiceringsdatum
Författare
HELENE ANNADOTTER
Nyckelord (Keyword)
microcystin, rapid sandfikration, activated carbon filtration, chlorination, arrificial groundwater recharge.
Nummer
1
Årgång
51
Utgåva
There are rwo basic lake types, holomictic and meromictic. Holomictic lakes have a complete verrical mixing whereas the circulation ofmeromictic lakes is incomplete. Meromictic condiaons may be due to accumulation of e.g. iron compounds m the deep water or intrusion ofsalt water into fi-eshwater lakes. Meromicuc conditions may also occur in deep coastal inlets which […]
Publiceringsdatum
Författare
TORE LINDHOLM
Nyckelord (Keyword)
meromicric lakes, coastal lakes, stratification, anoxia, bacterial plate
Nummer
1
Årgång
51
Utgåva
During the coming years, Sweden is planning to supporr the construction of several modern wastewarer treatment planrs in ihe Baltic States (e.g. Estonia), in order to improve the vast eutrophication ofthe coastal areas and the open Baluc Sea. Minor attendon is taken to the environmental impact of the future wasrewater treatment plant. Although, the lack […]
Publiceringsdatum
Författare
FREDRIK GRÖNDAHL och NILS BRANDT
Nyckelord (Keyword)
Estonia, Haapsalu, nutrienrs, Baltic Sea, wasrewater trearmenr plant,eutrophication.
Nummer
1
Årgång
51
Utgåva
The summer of 1994 was unusually hoi in Sweden and this caused high temperatures for the raw water and drinking water in Gothenburg. The temperature exceeded 20°C during several weeks. It is well known that temperature has a strong influence on the microbiological activity, but neither the bacterial counts nor the number of taste and […]
Publiceringsdatum
Författare
OLOF BERGSTEDT
Nyckelord (Keyword)
surface water, drinking water, temperature, taste and odour complaints, discolourarion, microbiological.
Nummer
1
Årgång
51
Utgåva
A large numbder of samples of the influent, efHuent and the sludge at the Rya WWTP in Göteborg wasanalyzed for organic Priority Pollutants berween 1984 and 1994. Many Priority Pollutants are not used in Göteborg or used in very small quandties and therefore have not been detected in any of the samples or detected sporadically. […]
Publiceringsdatum
Författare
NICKLAS PAXÉUS
Nyckelord (Keyword)
municipal, wastewater, sludge, organic Priorily Pollutants
Nummer
1
Årgång
51
Utgåva
The Klagshamn wastewater treatment plant is operated with extended BOD, phosphorus and nitrogen removal. A high and stable removal of nitrogen is reached with a process configuration based on pre-precipitation and the use of an external carbon source in a single sludge post-denitrification process. The detention time in the bioreactor is about 7 hours. The […]
Publiceringsdatum
Författare
ULF NYBERG, HENRIK ASPEGREN and BENGT ANDERSSON
Nyckelord (Keyword)
wastewater treatment, biological nitrogen removal, on-line instruments, automatic control, process optimization, plant operation
Nummer
4
Årgång
49
Utgåva
Experiments were carried out at Bromma wastewater treatment plant with nitrification of reject water using SBR technics (Sequencing Batch Reactor). The studies were performed mainly in a pilot plant scale, but some complementary tests were done in a laboratory scale. The purpose was to give a basis for estimation of an appropriate oxygen concentration and […]
Publiceringsdatum
Författare
AGNES MOSSAKOWSKA and BENGT HULTMAN
Nyckelord (Keyword)
activated sludge, biological treatment, diffusion, Monod, nitrification, oxygen, reject water, SBR, Sequencing Batch Reactor
Nummer
4
Årgång
49
Utgåva
In water with high levels of nitrogen, it can be of interest to use reverse osmosis for removal of the nitrogen. This can help to reduce the total load of the wastewater treatment plant. To improve removal of nitrogen, high pressure can be used to press the nitrogen-water through a reverse osmosis membrane. The nitrogen […]
Publiceringsdatum
Författare
ULF ERICSSON and NIKLAS ISAKSSON
Nyckelord (Keyword)
reverse osmosis, reject water, nitrogen and ammonium removal
Nummer
4
Årgång
49
Utgåva
Sewage sludge is in most cases not accepted as a fertilizer in agriculture. The reason is a concern for eventual environmental effects due to the presence of environmentally hazardous substances in sludge. Use of sludge in agriculture will not lead to environmental effects. A risk analysis shows this. Consequently, there are no environmentally hazardous substances […]
Publiceringsdatum
Författare
THOMAS HELLSTRÖM
Nyckelord (Keyword)
municipal sludge, agriculture, concern, risk analysis
Nummer
4
Årgång
49
Utgåva
Chlorine dioxide is a highly effective oxidising agent with powerful deodorising and bleaching properties. Its action on pathogenic micro-organisms is stronger than that of chlorine. A major drawback has, until now, been that chlorine dioxide invariably must be produced on the spot by reacting chlorine or hydrochloric acid in solution with sodium chlorite. A stable […]
Publiceringsdatum
Författare
KARSTEN PEDERSEN and NADI JAHROMI
Nyckelord (Keyword)
bacteria, chlorine dioxide, disinfection, Escherichia coli.
Nummer
4
Årgång
49
Utgåva
The Pyranine 120 % colourant is chemically the sodium salt of 3-oxypyrenetrisulphonic acid. It is used to colour district heating water when seaking leaks into warm domestic water supplies. It colours the water a fluorescent yellowish green, and small amounts can be detected either by UV light or spectrophotometrically. It is not detrimental to health.
Publiceringsdatum
Författare
ANNELI SKRÖKKI
Nyckelord (Keyword)
Pyranine 120 %, Pyranine, Solvent Green 7, detection of district heating leaks
Nummer
4
Årgång
49
Utgåva
At the Ringsjö plant, laboratory and pilot scale tests has been carried out with a process for water treatment where the conventional process coagulation-flocculation-sedimentation is accelerated by dosing of microsand in the flocculation step. The microsand improves the sedimentation velocity of the flocs formed, while at the same time reducing the flocculation time needed. The […]
Publiceringsdatum
Författare
ANDERS KRONVALL
Nyckelord (Keyword)
flocculation, sedimentation, microsand, hydrocyclone.
Nummer
4
Årgång
49
Utgåva
In order to reduce the red water problem in Göteborg, water quality was changed with respect to alkalinity and hardness. The raw water is very soft. By adding lime and carbon dioxide in the end of the water treatment process alkalinity is increased from 18 to 60 mg hydrogen carbonate/1. At the same time the […]
Publiceringsdatum
Författare
LARS ENANDER, BO BERGHULT
Nummer
1
Årgång
50
Utgåva
Unhealthy indoor climate in residential buildings has been the subject of intensive research in recent years, the purpose being to find the cause and to minimize health risks. One factor that has come under attentions radon and its decay products which when inhaled may give rise to lungcancer. Radon in drinking water can be a […]
Publiceringsdatum
Författare
ABRAHAM SJMEONIDIS
Nummer
1
Årgång
50
Utgåva
Trickling filters are normally considered to be difficult to use in systems designed for nitrogen removal. If the load of organic substances is low or can be reduced to a sufficiently low level, a trickling filter can however be used for nitrification and denitrification can be obtained in a succeeding denitrification process. This might be […]
Publiceringsdatum
Författare
ERIK SÄRNER
Nummer
1
Årgång
50
Utgåva
It has been found in several studies that the sludge settleability may deteriorate when a biologicai nutrient removal process is applied. However, so far only a few studies on the sludge characteristics at Swedish wastewater treatment plants with biological nutrient removal have been reported. A rwo-year study (august 1991-july 1993) at the Sjölunda wastewater treatment […]
Publiceringsdatum
Författare
HANS CARLSSON, NATUSCKA LEE and THOMAS WELANDER
Nummer
1
Årgång
50
Utgåva
At Bromma wastewater treatment plant experiments have been performed with nitrification of reject water by use of SBR technology (Sequencing Batch Reactor technology). Obtained results have shown that the sludge has good sedimentation properties and a high proportion of nitrifying bacteria. It was possible to decantate in pilot plant studies at least 40 % of […]
Publiceringsdatum
Författare
AGNES MOSSAKOWSKA, BENGT HULTMAN
Nummer
1
Årgång
50
Utgåva
New legislation in Sweden will lead to the elimlnation of landfills as a disposal method tor sewage sludge and new alternatives are under investigation. By employing thermal hydrolysis and separation techniques the sludge can be split into new components that have a market value which exceeds the value of their use as fertiliser. The process […]
Publiceringsdatum
Författare
BENGT HANSSON, JONAS GÖRANSSON
Nummer
1
Årgång
50
Utgåva
Copper is a common material in building plumbing system. Copper pipes corrode in different ways wich have consequences for the useful life of the pipe and also for water quality. From a water quality point of view, the uniform corrosion is of imponance. This type of corrosion, resulting in high copper content, is common at […]
Publiceringsdatum
Författare
EVA LINDJOHANSSON, TORSTEN HEDBERG, BO BERGHULT
Nummer
2
Årgång
50
Utgåva
By order of the Environment and Health Committy in the Community of Ljusnarsberg and as a part of the Community’s work for public health the Environment and Health Department has, during 1992, made an inquiry about the consumption habits of inland sea fish among sports fishermen living in the Community of Ljusnarsberg. The purpose of […]
Publiceringsdatum
Författare
ANNELIE OLOFSSON, LARS WESTHOLM, EDVARD LIDÉN
Nummer
2
Årgång
50
Utgåva
Experiments with nitrification of reject water by use of SBR technics at Bromma sewage treatment plant have shown that it is possible to obtain a complete nitrification at high reaction rates. The oxygen concenration was the main operational parameter that mfluenced the nitrification rate. Moreover the initialammonium concentration had a certain influence. The experiments showed […]
Publiceringsdatum
Författare
AGNES MOSSAKOWSKA, BENGT HULTMAN, LARS-GUNNAR REINIUS
Nummer
2
Årgång
50
Utgåva
There is an increasing need for rapid sandfilters in sewage treatment plants due to more stringent requirements on the quality of the treated water. Besides sandfilters could possibly be used for other treatment processes such as chemical precipitation or denitrification. These factors imply a heavy load of suspended particles on the sandfilters making the flushing […]
Publiceringsdatum
Författare
LENNART JÖNSSON, STIG LÖVGREN
Nummer
2
Årgång
50
Utgåva
Samples of incoming raw sewage vater have been collected on a five day basis every week during six months, and analyzed for seven heavy metals. A few determinations of other elements have also been made. These data have been combined with the results of the compulsory analytical control of effluent water and sludge to calculate […]
Publiceringsdatum
Författare
INGEMAR DELLIEN
Nummer
2
Årgång
50
Utgåva
A wetland area, including 22 ha of shallow ponds, channels and Inundated fenlands, has been created during 1993 adjacent to the town of Oxelösund (12500 inhabitants) on the Baltic coast of Sweden. The primary goal with the wetland is an annual removal of 22 tonnes of nitrogen from pretreated wastewater from the towns treatment plant. […]
Publiceringsdatum
Författare
HANS BERTIL WITTGREN, HANS WALLIN, PETER RIDDERSTOLPE och CHARLOTTE GUNSELL
Nummer
2
Årgång
50
Utgåva
The waste water treatment plant in Mindelo is oversized, with high evaporation and increasing salinity in the effluent water as a result. By subdividing the ponds with a plastic barrier, a much smaller volume is needed to achieve acceptable bacterial concentrations in the effluent water. The technique of subdividing ponds with a plastic barrier is […]
Publiceringsdatum
Författare
PER JOHANSSON, STAFFAN BENGTSSON, MIKAEL RÅNGEBY, PATRIK JOHANSSON and MARIE PERNRUP
Nummer
2
Årgång
50
Utgåva
The presence of compounds inhibitory to nitrification in sewage treatment is a severe problem when introducing biological nitrogen removal at municipal treatment plants. These compounds often have their origin in industrial wastewaters connected to the municipal sewage works. One way to decrease the risk for inhibition of the nitrifying microflora in the treatment plant is […]
Publiceringsdatum
Författare
ANDERS PERSSON, CHARLOTTE ANDERSSON, THOMAS WELANDER and LARS GUNNARSSON
Nyckelord (Keyword)
nitrification, inhibition, toxicity warning system, immobilization
Nummer
1
Årgång
49
Utgåva
The artificial groundwater recharge has been studied in order to earn knowledge about the processes active in this kind of drinking water production. Water and soil samples were taken from the infiltration basin and analyzed for their content of iron, manganese and organic carbon. The quality of the infiltrating water was rapidly improved with 95 […]
Publiceringsdatum
Författare
CRISTINA FRYCKLUND and GUNNAR JACKS
Nyckelord (Keyword)
drinking water, iron, manganese, organic carbon, filtersand, carbon dioxide, lime, alkalinity.
Nummer
1
Årgång
49
Utgåva
Dephosphatation in sewage has reduced the P-loading on the recipients, but has at the same time resulted in an accumulation of P in urban regions. Will this accumulation with time give rise to increased pollution from non-point sources of P? In order to quantify the P turnover in urban regions, a P-balance has been calculated […]
Publiceringsdatum
Författare
CURT FORSBERG and KARIN RENGEFORS
Nyckelord (Keyword)
P-balance, urban region, P-accumulation
Nummer
2
Årgång
49
Utgåva
Fågelmyran municipal landfill site, situated some ten kilometers north of Borlänge, Sweden, is run by Borlänge Energi AB. Leachate generated at the landfill is conveyed to the municipal wastewater treatment plant. Treatment is costly, inefficient and may affect the sludge quality negatively. Borlänge Energi decided to investigate the treatability of the water using existing facilities […]
Publiceringsdatum
Författare
TINA SUNDSTRÖM KARLBERG, HELENE ENGBERG, and BERNDT EKBLOM
Nyckelord (Keyword)
Activated sludge, biological treatment, leachate water, municipal landfill, nitrification, Sequenced Batch Reactor, SBR
Nummer
2
Årgång
49
Utgåva
Water samples were taken during the ice-free period in 1991 from Isojoki river in southwestern Finland to study seasonal and local variations of the water chemistry of the river. In this paper we have especially concentrated on acidification problems and buffer properties of the river water. Except measurements of pH, alkalinity and other parameters, buffer […]
Publiceringsdatum
Författare
LEO HARJU and JENS ANDERSÉN
Nyckelord (Keyword)
acidification, buffer capacity, Isojoki river, pH-titration curves, theoretical neutralization dose
Nummer
2
Årgång
49
Utgåva
Natural humic water was treated with simulated sunlight (310-800 nm) and the effects on some chemical parameters and the molecular size distribution of the dissolved organic matter were recorded. The dissolved organic carbon content, the light absorbance (254 nm), and the colour were found to decrease substantially already after irradiation for 24 hours. The proportion […]
Publiceringsdatum
Författare
MAARET KULOVAARA and PETER BACKLUND
Nyckelord (Keyword)
natural water, humic matter, dissolved organic matter, light-induced degradation
Nummer
2
Årgång
49
Utgåva
Mechanical and biological wastewater treatment was evaluated in a full scale test during the 1991-92 Wasa base expedition period. The base was erected on a nunatakk in the Norwegian Antarctic sector and housed 10-20 people. The results indicated that wastewater organics were reduced by a total of 70 %. Small changes in other constituents were […]
Publiceringsdatum
Författare
STEFAN MARKLUND and LARS-INGE MÄKITALO
Nyckelord (Keyword)
arctic/polar wastewater treatment, cold climate, zero discharge
Nummer
2
Årgång
49
Utgåva
A bloom of Prymnesium parvum Carter (Prymnesiophyceae) caused a considerable fish death in the Bay of Holminge, ca 12 km NO Stockholm, Sweden, during May and June 1991. The bay is a shallow coastal lake, influenced by brackish water from the Baltic Sea (Kyrkfjärden). During spring 1992 Prymnesium also invaded the Kyrkfjärden area. A maximum […]
Publiceringsdatum
Författare
EWA HOLMQUIST and TORBJÖRN WILLÉN
Nyckelord (Keyword)
fish mortality, Prymnesium parvum, water bloom, nuisance algae, the Baltic Sea, coastal lake.
Nummer
2
Årgång
49
Utgåva
In the wastewater plant at Särdal a biological treatment of phosphorus and nitrogen has been working successfully since 1990. At optimal conditions in spring and autumn of 1991 and 1992 the discharges were 0.3 mg/l of phosphorus and 6 mg/l of nitrogen. The removal of phosphorus was 93 % and of nitrogen 78 %. Summer […]
Publiceringsdatum
Författare
EVA HANSEN
Nyckelord (Keyword)
biological nutrient removal, biological phosphorus removal, nitrification, denitrification.
Nummer
2
Årgång
49
Utgåva
From February to April in 1992, oxygen gas was introduced in one of six aeration basins at the Slottshagen waste water treatment plant in Norrköping, Sweden. During this period the nitrification activity is usually very low and the oxygen levels in a large part of the aeration basins are below 1 mg/l. As oxygen was […]
Publiceringsdatum
Författare
BENGT HANSSON, LENNART NORD and MATS RYDÉN
Nyckelord (Keyword)
nitrification, oxygen gas, nitrification rate, sludge age, yield.
Nummer
2
Årgång
49
Utgåva
The phytoflagellate Prymnesium parvum Carter, and probably Prymnesium patellifera Green & Hibberd, belong to the toxinproducing algae in the Scandinavian coastal waters. Only particular physiological strains of the species are toxigenic. The toxic properties of P. parvum are attributed to a group of chemical compounds having similar composition, but different toxic effects. The toxic principle […]
Publiceringsdatum
Författare
OLAV M. SKULBERG, TORE AUNE and BJARNE UNDERDAL
Nyckelord (Keyword)
Prymnesium parvum, toxic, phytoflagellate, biotests, clone cultures, prymnesin, glycolipid, fish poisoning
Nummer
3
Årgång
49
Utgåva
Many rivers and estuaries in Western Finland are subjected to highly acidic runoff from acid sulphate (AS) soils in their catchments. Acidic inflows, clearly exceeding the buffering capacity of the recipients, are common during most spring and autumn floods. AS soil acidity causes serious damage to the fisheries m common in the affected area. The […]
Publiceringsdatum
Författare
KJELL WEPPLING
Nyckelord (Keyword)
acidification, acid sulphate soils, watercourses, liming, Western Finland
Nummer
3
Årgång
49
Utgåva
Water is scarce in Cape Verde. In Mindelo almost all fresh water is produced by desalination of sea water because of lack of fresh water. In this perspective reuse of waste water for agricultural purposes is a very interesting alternative. Mindelo is also the only city in Cape Verde with an existing infrastructure regarding the […]
Publiceringsdatum
Författare
PER JOHANSSON, MARIE GUNNARSSON, MIKAEL RÅNGEBY and BERTIL SIVERSSON
Nyckelord (Keyword)
reuse of waste water, biological ponds, irrigation
Nummer
3
Årgång
49
Utgåva
Characterization is a study of the effect of waste water or a chemical on the environment. The study is carried out by biological and chemical analytical methods. Characterization of waste water plays an important role in protecting the environment and working towards a society of recycling. In this paper different characterization models for waste water […]
Publiceringsdatum
Författare
MIKAEL KARLSSON, SVEN JOSEFSSON and PER OLSSON
Nyckelord (Keyword)
characterization of waste water, biodegradability, Inhibition of nitrification, Inhibition of respiration.
Nummer
3
Årgång
49
Utgåva
The nitrification process at Öresundsverket in Helsingborg was, during a test period of twelve weeks, effected by inhibiting substances. The inhibition was found both in laboratory tests and in full scale at the treatment plant. The laboratory tests performed are based on week samples. Despite dilution of a potential inhibitor in a week sample, two […]
Publiceringsdatum
Författare
KARIN JÖNSSON
Nyckelord (Keyword)
nitrification, inhibition
Nummer
3
Årgång
49
Utgåva
Nitrification of reject water with SBR technics has been studied at Bromma sewage treatment plant in Stockholm. At the beginning of 1993 an investigation of the nitrification by use of multivariate method was carried out. Experiments showed that the nitrification rate is very strong depending on the oxygen content in water. Moreover the experiment proved […]
Publiceringsdatum
Författare
AGNES MOSSAKOWSKA
Nyckelord (Keyword)
nitrification, Sequencing Batch Reactor, SBR, multivariate method, activated sludge, biological treatment, reject water
Nummer
3
Årgång
49
Utgåva
Focus is kept on the importance of water in sustaining life. A new concept – the aquatorium – is introduced describing waterly related processes. Out of many only some models are fit to describe energetically driven processes. Attention is made to the concept of free energy as potential work. Accurate models of hydrobiological processes and […]
Publiceringsdatum
Författare
BJØRN D. BERG
Nyckelord (Keyword)
hydrological cycle, aquatorium, hydrobiological processes, water, life, free energy.
Nummer
3
Årgång
49
Utgåva
Between 80 and 90 per cent of the deposition of acidifying air pollutants on Sweden originates in other countries. Most of it comes from western Europe, with Germany and Great Britain being the two biggest contributors. In the 1980s, European emissions of sulphur dioxide decreased by 25-30 per cent, while those of nitrogen oxides increased […]
Publiceringsdatum
Författare
CHRISTER ÅGREN
Nummer
3
Årgång
49
Utgåva
This paper describes a new technique to operate SBR package plants. The whole process – aeration, integral liquid flow, excess sludge withdrawal and addition of precipitation chemicals – is powered by a single side channel blower. The conclusion is that the gain of this technique are package plants extremely low in service and maintenance.
Publiceringsdatum
Författare
ERIK LARSSON
Nyckelord (Keyword)
SBR, package plant, activated sludge, phosphorus removal, co-precipitation
Nummer
3
Årgång
49
Utgåva
The Warsaw WWTP ”Czajka” was designed for the flow of 400000 m3/d. During wastewater treatment 4 800 m3 /d sludge settle down in the primary settling tanks. It’s a mixture of primary and excess activated sludge. The settling tanks are desludged three times a day and the sludge flows by gravity to 4 thickener and […]
Publiceringsdatum
Författare
BRONISLAW BARTKIEWICZ and MAREK ZABOST
Nummer
3
Årgång
49
Utgåva
Combined biological phosphorus and nitrogen removal is being studied in a cooperative project involving the Department of Water and Environmental Engineering at Lund Institute of Technology and Sjölunda sewage treatment plant in Malmö. The project aims at finding out the lowest effluent concentrations of phosphorus and nitrogen that can be obtained in a combined process. […]
Publiceringsdatum
Författare
HANS CARLSSON
Nyckelord (Keyword)
nitrogen removal, phosphorus removal.
Nummer
2
Årgång
48
Utgåva
The composition of the nitrifying microflora may vary considerably between different sewage treatment plants. The taxonomy of the nitrifying bacteria and the conditions needed for nitrification are outlined. Present and future methods for the detection of nitrifiers and the assessment of nitrification inhibition are discussed.
Publiceringsdatum
Författare
ANDERS TERNSTRÖM, THOMAS WELANDER and LARS GUNNARSSON
Nyckelord (Keyword)
nitrifying bacteria, taxonomy, growth conditions.
Nummer
2
Årgång
48
Utgåva
Inundation of meadows is an old farming system, where the water from a river is used to flood the nearby meadows during a number of days, in order to increase the production. During 1991 it has been tested, in two places in Scania (the southernmost part of Sweden), as a system for removing nitrogen from […]
Publiceringsdatum
Författare
THOMAS PERSSON and LARS BENGTSSON
Nyckelord (Keyword)
denitrification, nitrogen, wetland.
Nummer
2
Årgång
48
Utgåva
Tunnelwork for the new railway through Botkyrka parish has shown to generate a large nitrogen emission to water recipients. Tot-N concentrations over 50,000 ìg/l have been measured in water from the tunnel outlet. The maximum amount of nitrogen emitted to water recipients as NH3, NO2 and NO3 from a tunnellength of approx 4.8 km is […]
Publiceringsdatum
Författare
HÅKAN SLOTTE
Nummer
2
Årgång
48
Utgåva
Upgrading existing water treatment plants includes evaluating possibilities lo get a new raw water source. Both quality and quantity can be increased. The natural resources should be regarded as possible stages in a process. It requires a coordination of knowledges in geohydrology and water process engineering. Upgrading Gnesta Water Treatment Plant is a good example […]
Publiceringsdatum
Författare
LENNART MARTINELL och JESPER FEDDERSÉN
Nyckelord (Keyword)
ground water treatment, reinfiltration
Nummer
2
Årgång
48
Utgåva
The paper describes the technical improvements which can be effected in our existing water supply and sewerage networks in order to secure the present function demands regarding public health and environment. A substantial development work has been accomplished in this field during the later years and ongoing R&D projects are described. At present there are […]
Publiceringsdatum
Författare
ERIK ISGÅRD
Nyckelord (Keyword)
sewerage, water supply, computer modelling, networks, function demands
Nummer
2
Årgång
48
Utgåva
Denitrification involves the bacteria-mediated reduction of nitrate, nitrite and nitrous oxide to atmospheric dinitrogen. The evolved nitrogen gas usually leaves the environment in which it was produced and diffuses to the atmosphere. The process appears in most environments where decomposable organic matter has accumulated, e.g. soils, lake sediments and wetlands. Through the decomposition of organic […]
Publiceringsdatum
Författare
LARS LEONARDSON
Nyckelord (Keyword)
denitrification, bacteria, regulating factors, sediment, wetland, quantification, methods.
Nummer
3
Årgång
48
Utgåva
A pilot plant scale investigation of nitrification of sidestreams from centrifugation of digested sludge was carried out at Bromma sewage treatment plant in the beginning of 1991. The SBR technology (Sequencing Batch Reactor technology) was implemented. The investigations, which have been carried out, showed that the SBR technology is appropriate for nitrification of sidestreams. Complete […]
Publiceringsdatum
Författare
AGNES MOSSAKOWSKA and LARS-GUNNAR REINIUS
Nummer
3
Årgång
48
Utgåva
In June 1990 the Municipality of Frederikshavn inaugurated the world’s first full-scale plant for chemical-physical treatment of the reject water. After a working period of more than a year with adjustments and corrections the plant is working very satisfactorily, and together with the planned installation of the French developed BIOSTYR system the reject water treatment […]
Publiceringsdatum
Författare
TORBEN THØGERSEN
Nummer
3
Årgång
48
Utgåva
The pH of seawater is dependent on shifts in the autoprolysis of hydrogen carbonate 2 HCO3-= CO2 + H2O + CO32-caused by the production and decomposition of planktonic maiter. Using stoichiometric relationships and mean concentrations of nitrate and phosphate it is shown that surface seawater will have a pH close to 8 at 15°C on […]
Publiceringsdatum
Författare
DAVID DYRSSEN
Nyckelord (Keyword)
alkalinity, total carbonate, pH, seawater, atmospheric carbon dioxide
Nummer
3
Årgång
48
Utgåva
Direct determinations of the distribution of mercury between aqueous phase and sludge phase have not been made earlier. One reason might be the low concentration level of mercury, which is close to or below the detection limit for the analytical procedures in common use. The mercury concentration in the sludge phase is however much higher […]
Publiceringsdatum
Författare
PER ROOS and INGEMAR DELLIEN
Nyckelord (Keyword)
mercury, waste water treatment, radioactivity
Nummer
4
Årgång
48
Utgåva
Private water-supply wells, fed by acidic groundwater, commonly have problems with corrosion of household connections. To control these problems the water can be treated in filter units containing calcerous materials. At the Department of Sanitary Engineering, Chalmers University of Technology, filter materials for neutralisation have been investigated. The materials tested were crushed limestone (CaCO3) and […]
Publiceringsdatum
Författare
GITTAN HORKEBY
Nyckelord (Keyword)
neutralization, water-supply wells, acidic ground-water, crushed limestone, semicalcined dolomite.
Nummer
4
Årgång
48
Utgåva
Infiltration facilities have become more common during recent years due to problems associated with the conventional storm watersystems, such as overflows and the release of pollutants into receiving waters. In northern Sweden, stormwater pipes and manholes have often been damaged by frost heave and ice formations, resulting in overflows during the snow melt period. In […]
Publiceringsdatum
Författare
CHRISTER STENMARK
Nyckelord (Keyword)
storm water, percolation basin, cold climate, viscosity, ice formations.
Nummer
4
Årgång
48
Utgåva
To be able to use the available volumes as effectively as possible in a process for combined biological phosphorus and nitrogen removal, knowledge about the variations during the day and the week is needed. This work is a comparison between the behaviour in the unaerated reactors during a typical wednesday (high COD/TKN ratio) and a […]
Publiceringsdatum
Författare
HANS CARLSSON
Nyckelord (Keyword)
Biological nutrient removal.
Nummer
4
Årgång
48
Utgåva
The Center for Environmental Monitoring at the Swedish University of Agricultural Sciences has on commission by the Swedish Environmental Protection Agency (SEPA), and as a part of the current inspection of national and regional environmental monitoring programmes, evaluated the regional freshwater monitoring programmes supervised by the County Administrations in Sweden. The task has been to […]
Publiceringsdatum
Författare
STEFAN LÖFGREN
Nyckelord (Keyword)
regional freshwater monitoring, aims, methodes, use
Nummer
4
Årgång
48
Utgåva
The Swedish Environmental Protection Agency has been commissioned by the Swedish Government to evaluate the present and propose a new environmental monitoring and assessment programme for Sweden. Decisions on the new national monitoring programme will be taken in February 1993 and decisions on the regional programmes later in the spring. The aims of the proposed […]
Publiceringsdatum
Författare
ANDERS BERNTELL
Nyckelord (Keyword)
monitoring, assessment, Sweden, soil, groundwater, freshwater.
Nummer
4
Årgång
48
Utgåva
Transport and retention of nitrogen and phosphorus was studied in a small (51 km2), agricultural watershed in southern Sweden. The article deals predominantly with: – comparison of different methods for nutrient transport calculation; – estimation of nutrient retention in a meandering part of the stream; – analysis of two similar tributaries with different nutrient transport. […]
Publiceringsdatum
Författare
OLA LINDÉN, KARIN SUNDBLAD, MAJA BRANDT and HANS BERTIL WITTGREN
Nyckelord (Keyword)
nutrient transport, phosphorus, nitrogen, retention, diffuse sources
Nummer
1
Årgång
49
Utgåva
A hydrochemical model (PULSE) has been used to simulate liming activities in Ljustorpsån, a tributary to river Indalsälven in central Sweden. The PULSE-model is a conceptual runoff model with possibilities to simulate some chemical variables, such as alkalinity and pH. The PULSE-model treats alkalinity as a function of the calculated groundwater level in the model. […]
Publiceringsdatum
Författare
HÅKAN SANNER, HANS BERTIL WITTGREN, BENGT CARLSSON and INGEMAR HOLMSTRÖM
Nyckelord (Keyword)
acidification, hydrochemical model, liming, surface water
Nummer
1
Årgång
49
Utgåva
During the winter ice-cover an inverse thermal stratification arises in dimictic lakes because cold surface water overlays the warmer and deeper lake water owing to differences in density. This condition can create so-called overflows in lakes, with the result that cold inflow water will only mix with the surface water immediately below the ice-cover. Changes […]
Publiceringsdatum
Författare
INGEMAR ABRAHAMSSON
Nyckelord (Keyword)
overflows, episodic, acidification, lime-treatment, lakes
Nummer
1
Årgång
49
Utgåva
The immune defence of arthropods is specifically and efficiently turned on after infection with fungi or bacteria. Different proteins in the blood of the animal are activated by the addition of cell wall polysaccharides from these microorganisms, and the activation can be studied in vitro with commercial substrates that form coloured products after enzymatic reaction […]
Publiceringsdatum
Författare
ANNA ASPAN and KENNETH SÖDERHÄLL
Nyckelord (Keyword)
endotoxin determination, lipopolysaccharides, â-l,3-glucans, prophenoloxidase, crayfish.
Nummer
1
Årgång
49
Utgåva
Current practice in Swedish environmental policy treats most acid surface waters as likely cases of acidification resulting from acid deposition that are suitable objects for liming. That approach to the management of acidity in surface waters is based largely on the understanding of surface water acidification in the clear water lakes and streams of southern […]
Publiceringsdatum
Författare
KEVIN H. BISHOP
Nyckelord (Keyword)
dissolved organic carbon (DOC), northern Sweden, organic acidity, surface water acidification.
Nummer
4
Årgång
47
Utgåva
Benthos from lakes and running waters has been used to assess the extent of surface water acidification in Sweden 1969-1991. Altogether 2,861 different waters have been investigated. The acidification status was determined by classifying the different taxa into two groups – acid sensitive, i.e. do not tolerate pH below 5.5 and acid tolerant, i.e. tolerate […]
Publiceringsdatum
Författare
EVA ENGBLOM and PÄR-ERIK LINGDELL
Nyckelord (Keyword)
acidification, bottom fauna
Nummer
4
Årgång
47
Utgåva
Trial operation with biological nitrogen removal was started up on July 1, 1989, in an extended activated sludge line at the sewage treatment plant Västra Stranden in Halmstad with financial support of ”New Technics” by Swedish Environmental Protection Agency. The possibilities to increase the nitrogen removal as well as the phosphorus removal have been investigated […]
Publiceringsdatum
Författare
BERNT ERICSSON
Nyckelord (Keyword)
biological nitrogen removal, anoxic pre-denitrification, post-denitrification, combined pre- and post-denitrification, internal and external carbon source
Nummer
1
Årgång
48
Utgåva
För att uppnå bättre vattenkvalitet i Laholmsbukten har bl a Halmstads kommun ålagts att under de närmaste åren genomföra miljöförbättrande åtgärder i kommunens avloppsanläggningar, främst inriktade på kvävereduktion, vid tre större avloppsreningsverk. Målet är att minska kväveutsläppen från ca 300 ton/år till ca 120 ton/år. Beräknad kostnad är ca 100 milj kr. Trots denna mycket […]
Publiceringsdatum
Författare
PER-OLOF HAKEMAN
Nummer
1
Årgång
48
Utgåva
Supernatant liquid from digesting tanks is rich in ammonia. Treatment of supernatant liquid by stripping and absorption was investigated technically and economically under Danish conditions. In a pilot plant, 50 % of the ammonia was removed in one tower. The ammonia was absorbed in sulphuric acid whereby ammonium sulphate was formed. Technical and economical assessments […]
Publiceringsdatum
Författare
KARSTEN KROGH ANDERSEN
Nyckelord (Keyword)
nitrogen removal, stripping, sludge supernatant liquid.
Nummer
1
Årgång
48
Utgåva
During the autumn of 1991 laboratory tests and pilot plant studies were carried out at LTH and Sjölunda sewage treatment plant in Malmö. The aim was to investigate the influence of secondary release of phosphate in biological phosphorus removal systems. Secondary release of phosphate was observed under aerobic conditions both in the laboratory tests and […]
Publiceringsdatum
Författare
HANS CARLSSON
Nyckelord (Keyword)
biological phosphorus removal, secondary release
Nummer
1
Årgång
48
Utgåva
P removal and chlorination of artificial wastewater were examined by a continuous flow system. The ability of an electrolyser with carbon electrodes in adjusting pH, together with free chlorine generation, was tested. Interesting results concerning the energy consumption have been described.
Publiceringsdatum
Författare
OLA V GRØTERUD and LECH SMOCZYNSKI
Nyckelord (Keyword)
P removal, electrocoagulation-flotation, chlorination, pH-adjusting, continuous flow.
Nummer
1
Årgång
48
Utgåva
Could future sharper demands for phosphorus removal at the wastewater treatment plants be met with a broad change-over to washing-agents without phosphorus? A full scale experiment has been conducted at the wastewater treatment plant Dagsberg in the community of Norrköping. At this plant phosphorus is removed through coagulation with ferric chloride. The water consumers in […]
Publiceringsdatum
Författare
ANDERS TJEDER, EVA LINDAHL, KERSTIN YGGE, and ULF ARUMSKOG,
Nyckelord (Keyword)
phosphorus, wastewater treatment plant, washing-agents without phosphorus, full scale experiment
Nummer
1
Årgång
48
Utgåva
This article reports on the first part of a study of biological and chemical processes in a sewer network and discusses the requirements for the biological decomposition of organic material. The consequences of smoothing flow variations, which is preferred by the sewage treatment plant, are considered. This study shows that it is theoretically possible to […]
Publiceringsdatum
Författare
MALIN TORELL, GILBERT SVENSSON and TORSTEN HEDBERG
Nyckelord (Keyword)
oxygen, sewer, wastewater, bioreactor
Nummer
1
Årgång
48
Utgåva
Today the west coast of Sweden can be flooded at a combination of strong winds from west and low pressures. In a future with climatic change and increasing precipitation and raising sea-levels a considerable increase of flood occasions can be expected. The consultant VBB VIAK has together with the municipalities of Göteborg, Kungsbacka and Halmstad […]
Publiceringsdatum
Författare
THOMAS JOHANSSON
Nyckelord (Keyword)
greenhouse effect, raising sea levels, increasing precipitation floodings, coast erosion, consequences.
Nummer
1
Årgång
48
Utgåva
Most climatologists recognize that emissions of carbon dioxide, methane, and other so called greenhouse gases will result in a gradually increasing mean global temperature. The increase in temperature will, in turn, lead to rising sea levels, caused by thermal expansion of the oceans and melting of arctic and antarctic ice caps. According to researchers, a […]
Publiceringsdatum
Författare
HANS HANSON
Nyckelord (Keyword)
sea level rise, greenhouse effect, beach erosion, inundation
Nummer
1
Årgång
48
Utgåva
The flow of water which leaks in through sewer manhole covers was estimated by experiments. During storms or periods of snow-melt, the volume of water leaking in through these manholes may increase the flow in the sewers substantially, resulting in an increased risk of secondary damage. The variations in water flow leaking through the key-holes […]
Publiceringsdatum
Författare
JÖRGEN HANÆUS
Nyckelord (Keyword)
wastewater, manhole covers
Nummer
1
Årgång
48
Utgåva
NATURANPASSAT- DRIFTSNÅLT - Öppna filterbäddar, tre nya anläggningar / Open Low-loaded Filter Basins
Open low-loaded filter basins with drains is one example of biological methods for sewage treatment. Results from two new units, in operation since 1991, show a 95 %-reduction of total-P and BOD7 during the summer. The reduction is less during vintertime, due to lower biological activity in the filter. A study of this type of […]
Publiceringsdatum
Författare
SÖREN BYLUND, and TORSTEN OLOFSSON
Nyckelord (Keyword)
sewage treatment, open filter basins
Nummer
1
Årgång
48
Utgåva
Det danska dataprogrammet EFOR för simulering av de dynamiska processerna i en aktivslamanläggning tillgängligt i svensk översättning. I programmet efterliknas driften av ett reningsverk, och driftparametrar och driftresultat kan beräknas. Effekterna av ändrade drift- och belastningsförhållanden kan således förutses med programmets hjälp. Programmet är ett redskap, som kan användas för såväl driftoptimering som för analyser […]
Publiceringsdatum
Författare
SÖREN EJHED
Nummer
1
Årgång
48
Utgåva
The quality of drinking water must be monitored continuously. Before a raw water supply is taken into use its quality must be checked very carefully, and more detailed examinations must then be made at later stages, e.g. after five years. The larger examinations in effect form a continuous monitoring programme and can reveal some astonishing […]
Publiceringsdatum
Författare
ANNELI SKRÖKKI
Nyckelord (Keyword)
drinking water, water quality, water, ground water, surface water, water analyses
Nummer
1
Årgång
48
Utgåva
To estimate the transport of different substances in streams and rivers, continuous series of runoff data are required. However, for most points where hydrochemistry is monitored, there are no adjacent discharge stations. As an alternative, the Swedish Meteorological and Hydrological Institute has since 1986 used the PULSE model, a conceptual runoff model, to produce the […]
Publiceringsdatum
Författare
BARBRO JOHANSSON
Nyckelord (Keyword)
runoff modelling, Skaraborgs län
Nummer
2
Årgång
48
Utgåva
A literature study and a case study have been made to investigate the possibility to use GIS and remote sensing for calculating transportation of phosphorus and nitrogen in a catchment. To classify the land use a Spot image was used together with a map of urban areas. Other parameters such as land use, inclination, soil […]
Publiceringsdatum
Författare
SONIA ERIKSSON and ÅKE SIVERTUN
Nyckelord (Keyword)
satellite images, GIS, Geographical Information System, phosphorus, nitrogen, nutrient transport, USLE, computer modelling
Nummer
2
Årgång
48
Utgåva
The River Vikedalselva located on the southwestern part of Norway is monitored to detect acidification trends and liming effects as part of national monitoring programmes. The acidification of the river ha caused repeated fish kills of smolts and presmolts of Atlantic salmon (Salmon salar L.) and sea trout (Salmo trutta L.). The river showed significant […]
Publiceringsdatum
Författare
ATLE HINDAR and ARNE HENRIKSEN
Nyckelord (Keyword)
acidification trends, liming effects, river monitoring, feed-back system, cost-effectiveness.
Nummer
2
Årgång
48
Utgåva
Physical and chemical features of four cirque lakes situated in the Precambrian Basement north of the Arctic Circle are studied. Temperature, oxygen, water colour, turbidity and CODMn profiles together with transparency and lake colour indicate that the lakes are dimictic and oligotrophic. Deficiency of phosphorus are probably the main factor limiting primary production. The total […]
Publiceringsdatum
Författare
DAG OLAV ANDERSEN
Nyckelord (Keyword)
cirque lakes, oligotrophic, acidification
Nummer
2
Årgång
48
Utgåva
The aim of the paper is an attempt to describe the ecological state of water objects on the basis of heavy metals concentrations in the superficial sediments of six lakes of Pechenga district of Murmansk region, situated on different distance from heavy metals pollution source – the ”Pechenganickel” company. Contamination factors and degrees of contamination […]
Publiceringsdatum
Författare
VLADIMIR DAUVALTER
Nyckelord (Keyword)
superficial lake sediments, heavy metal pollution, contamination factor, degree of contamination.
Nummer
2
Årgång
48
Utgåva
Water resources management in Germany is based on river basin related planning and discharge fees respectively. Large amounts of data are processed in the planning, that is describing and analyzing, emphasizing on solving conflicts between water users (including the natural ecosystem). Management is more connected with the fees that are taken out mainly on the […]
Publiceringsdatum
Författare
THOMAS GUMBRICHT
Nyckelord (Keyword)
water resources management, Germany
Nummer
3
Årgång
47
Utgåva
The process is here called ”Simultaneous Denitrification” though intensive treatment with activated sludge is concerned and biological removal of both nitrogen and phosphorus is obtained. However, nowadays nitrogen removal is more interesting, as phosphorus removal is possible by several methods. The process has no specific aeration or anoxic zones. Nitrification is intensive, primarily because of […]
Publiceringsdatum
Författare
ZDENEK VOR
Nyckelord (Keyword)
biological phosphorus removal, biological nitrogen removal, simultaneous denitrification
Nummer
3
Årgång
47
Utgåva
Aspects of the selection of filters for the determination of suspended solids in effluents and natural waters are discussed. Different brands of glass fibre filters and polycarbonate filters are compared. No single filter can be standardized for the determination of suspended solids. The choice of filter depends on the measurement in question and on the […]
Publiceringsdatum
Författare
KIRSTI HAAPALA, and BRITA STARCK
Nyckelord (Keyword)
suspended solids, analysis, test method, filtration, effluent, sea water, fresh water.
Nummer
3
Årgång
47
Utgåva
This article discusses the main issues of the Gouvernment’s latest proposition called ”a satisfactory environment for living”. Discharge of nitrogen from antropogenic sources, especially from sewage treatment plants on the coast, is discussed. The National Swedish Environmental Protection Board, SNV, has claimed that 70 major sewage plants ought to be extended with efficient nitrogen removal […]
Publiceringsdatum
Författare
HANS ZETTERLING
Nummer
3
Årgång
47
Utgåva
Nitrogen removal by biological denitrification is a well-known process. Several processes in full scale are operating in Scandinavia. The process alternatives are described on the basis of biomass composition, process lay-out, and special contractor design. The systems described includes biological filters, seperate sludge systems, and combined sludge systems. Combined sludge is the most common system […]
Publiceringsdatum
Författare
JES LA COUR JANSEN and SVEND-ERIK JEPSEN
Nyckelord (Keyword)
nitrogen removal, biological denitrification, process alternatives
Nummer
3
Årgång
47
Utgåva
At GRYAAB’s wastewater treatment plant, Ryaverket, in Gothenburg, pilot plant investigations are being performed for evaluating technologies which can be used to meet anticipated demands for 50 % nitrogen removal. Two alternatives are being investigated. One alternative uses pre-denitrifiction in the activated sludge process. Preliminary results show that this is a functional but expensive alternative […]
Publiceringsdatum
Författare
ANN LYNGÅ
Nyckelord (Keyword)
pilot test, nitrification, rotating biological contactor, trickling filter, denitrification, activated sludge
Nummer
3
Årgång
47
Utgåva
Phosphorus and nitrogen mass balances for Lake Vänern show that ca 70 % of the total phosphorus input accumulates in the sediments, while 25 to 40 % of the total nitrogen input was lost via sedimentation and denitrification. These results are based on total input calculations for the period 1970 to 1989, and transport via […]
Publiceringsdatum
Författare
HÅKAN OLSSON
Nyckelord (Keyword)
Lake Vänern, phosphorus, nitrogen, mass balance, retention
Nummer
4
Årgång
47
Utgåva
P removal and chlorination of artificial wastewaters by electrocoagulation – flotation and Cl2 generation were investigated. The Cl2 generation by carbon electrodes and the Al generation by Al electrodes, employing alternating current, were combined into a recirculation system.
Publiceringsdatum
Författare
OLAV GRØTERUD and LECH SMOCZYNSKI
Nyckelord (Keyword)
electrolysis, P removal, Cl2 generation
Nummer
4
Årgång
47
Utgåva
Full scale tests with nitrogen removal have been performed at the Klagshamn wastewater treatment plant in Malmö, Sweden. Characterization of the wastewater and earlier tests at the plant have shown that the organic material in the primary effluent was limiting the overall nitrogen removal. The organic material in the raw wastewater measured as BOD7 was […]
Publiceringsdatum
Författare
ULF NYBERG, BENGT ANDERSSON and HENRIK ASPEGREN
Nyckelord (Keyword)
wastewater, nitrogen removal, particulate organic material, full-scale, nitrification, denitrification, Microthrix parvicella.
Nummer
4
Årgång
47
Utgåva
A simple model for calculation of nitrogen transports and the effect of wetlands on nitrogen retention is presented. Model input data were taken from an inventory of potential wetlands in the county of Halland (Wessling 1991, Wessling and Skage 1991). Nitrogen retention was calculated according to a relationship between areal nitrogen load and areal nitrogen […]
Publiceringsdatum
Författare
LARS STIBE
Nyckelord (Keyword)
nitrogen, wetland restoration, cost efficiency, modelling.
Nummer
4
Årgång
47
Utgåva
There are several ways to obtain information about land use and vegetation for an area. In this project we have used satellite images to calculate statistics for the drainage area of River Fyrisån in Uppland, Sweden. A Landsat TM (Thematic mapper) image registered on the 7th of July, 1989 was used. The spectral information in […]
Publiceringsdatum
Författare
JAKOB NISELL and MAUD WALLSTEN
Nyckelord (Keyword)
Fyris River, drainage area, satellite data, soil classification, vegetation classification, area determination.
Nummer
4
Årgång
47
Utgåva
The creation and restoration of wetlands has been suggested as an efficient method for the reduction of the transport of nitrogen to the Swedish coastal waters. In the paper, which is written from a hydrological viewpoint, a few critical questions are identified which require further clarification. The questions concern our knowledge about retention processes, dynamics […]
Publiceringsdatum
Författare
STEN BERGSTRÖM
Nyckelord (Keyword)
wetlands, nitrogen retention, hydrology
Nummer
4
Årgång
47
Utgåva
There are diverging opinions on nitrogen retention in wetlands. In southern Sweden, wetlands contribute to limit nitrogen leaching. In forest wetlands in central and northern Sweden there are only indications on small or no retention effects. Wetland types as well as the nitrogen load vary. Outflow of nitrogen from forested watersheds, including considerable wetland areas, […]
Publiceringsdatum
Författare
LARS LUNDIN
Nyckelord (Keyword)
eutrophication, hydrochemistry, hydrology, nutrient uptake, peatland.
Nummer
4
Årgång
47
Utgåva
The role of wetlands, ponds and lakes in the retention of nitrogen and thus in the decrease of nitrogen transport to the sea is under discussion in Sweden. In this paper nitrogen budgets for Lake Björkaren during four years are presented. The lake is very shallow and almost covered with higher vegetation and the water […]
Publiceringsdatum
Författare
KURT PETTERSSON
Nyckelord (Keyword)
nitrogen, budget, retention, wetland
Nummer
4
Årgång
47
Utgåva
From September 1988 up to June 1991 a full-scale experiment was conducted using a submerged macrophyte pond and a root-zone for wastewater treatment. The mean removal was 32 % and 46 % of nitrogen and 62 % and 61 % of phosphorus respectively. The major removal mechanism for N was denitrification and for P assimilation, […]
Publiceringsdatum
Författare
INGVAR HÖRBERG, LARS KYLEFORS, and Thomas Gumbricht
Nyckelord (Keyword)
eutrophication, wastewater treatment, macrophyte system, nitrogen, phosphorus, ecological engineering.
Nummer
4
Årgång
47
Utgåva
The concentration of nitrous oxide in the atmosphere increases with 0.25 % per year. Nitrous oxide degrades ozone and it also increases the green-house effect. Many biological processes can produce nitrous oxide. The three most important processes are nitrification, denitrification and dissimilatory ammonium production. These biological processes are of importance in development of systems for […]
Publiceringsdatum
Författare
MATTS-OLA SAMUELSSON and LEIF KLEMEDTSSON
Nyckelord (Keyword)
dikväveoxid, växthuseffekt, jord, denitrifikation, våtmark
Nummer
4
Årgång
47
Utgåva
In southern Sweden, changes in agricultural practices have affected the streamland interface increasing nutrient transport to the sea. Results from ongoing studies suggest that these areas surrounding Scanian streams are important in nutrient removal. In artificially induced surface runoff through a riparian buffer strip, 66 % of the PO4-P was retained during the first 8 […]
Publiceringsdatum
Författare
LENA B.-M. VOUGHT (Petersen), JEAN O. LACOURSIERE and NEAL J. VOELZ
Nyckelord (Keyword)
nutrient removal, nitrogen, phosphorus, surface runoff, subsurface flow, hyporheic, riparian vegetation, buffer strip, stream restoration
Nummer
4
Årgång
47
Utgåva
Recent studies show that anthropogenic acid surges provide the major acidification problem for lakes and watercourses in northern Sweden. Anthropogenic acid episodes may occur in around 20-40 % of all watercourses and in around 15-30 % of all lakes. Anthropogenic acidification throughout the year is a lesser problem. Predictions for the future using mathematical models […]
Publiceringsdatum
Författare
Y.-W. BRODIN
Nyckelord (Keyword)
acidification, northern Sweden, surface waters, current status, future, liming.
Nummer
4
Årgång
47
Utgåva
Scandinavian freshwater acidification was observed at the end of the nineteen sixties and was thought to be a result of the observed pH-decreasing in the precipition over north-western and northern Europe (Oden and Ahl 1970). These results were obtained from the monitoring of the water quality in the Swedish rivers started in 1965 and a […]
Publiceringsdatum
Författare
THORSTEN AHL
Nummer
4
Årgång
47
Utgåva
Soil acidification has not as yet been observed in upper Norrland. Possibly the investigations mostly carried out in well drained soils may not be relevant however as an early stage of surface water acidification should concern the discharge zones. In these zones the flow is channelled to restricted soil volumes both depthwise and sideways. This […]
Publiceringsdatum
Författare
GUNNAR JACKS
Nyckelord (Keyword)
soil acidification, surface water, peat land
Nummer
4
Årgång
47
Utgåva
The accumulation and distribution of PAH and PCB in different size fractions of contaminated sediments from The Norwegian Fjord Sandefjord and the bioaccumulation of these contaminants in sediment reworkers have been studied using dredged sediments.The sediment reworker Corophium volutator (a sediment reworker included in OSPAR’s toxicity test battery for chemicals used and discharged offshore in […]
Publiceringsdatum
Författare
LARS J. HEM1, EILEN A. VIK, HANS-JACOB SVENSEN, and TORE LUNDH
Nyckelord (Keyword)
PAH, PCB, bioavailability, bioaccumulation, Corophium volutator, fractioning, distribution, contaminated
sediments, particle size.
Nummer
4
Årgång
60
Utgåva
Most methods for determination of lignin derivatives in effluents and recipient waters are based on photometric measurements directly or after colour reactions with the phenolic hydroxyl groups. These methods are critically discussed. In applying the methods it is assumed that the character of lignin derivatives is aromatic. This is the case for lignin derivatives of […]
Publiceringsdatum
Författare
BRITA STARCK and PEHR-ERIK SÅGFORS
Nyckelord (Keyword)
lignin, derivatives, kraft pulp, bleaching effluent, analysis, spectrometry.
Nummer
1
Årgång
47
Utgåva
Loads of phosphorus, nitrogen and CODMn have been estimated on an annual basis from two nearby watersheds in central Sweden. The computations were performed according to the following five techniques: 1.Momentary analysis of concentration together with discharge measurements in the middle of a bimonthly period. 2. Momentary analysis of concentration as above but with measurements […]
Publiceringsdatum
Författare
ABRAHAM SIMEONIDIS
Nyckelord (Keyword)
statistical methods, nutrient loads, water pollution.
Nummer
1
Årgång
47
Utgåva
Denitrification tests with a DynaSand filter have been performed at the Klagshamn sewage treatment plant in Malmö. Effluent wastewater from a nitrifying activated sludge plant was treated in a filter with a surface area of 0.7 m2 and a sand bed depth of 2 m. The grain size of the sand was between 2 and […]
Publiceringsdatum
Författare
BENGT ANDERSSON, HENRIK ASPEGREN, LEIF BERG and ANNE GUSTELIUS
Nyckelord (Keyword)
denitrification, sand filter, organic carbon, acetate, methanol
Nummer
1
Årgång
47
Utgåva
Measurements of bacterial growth potential were carried out in the drinking water treatment plant and distribution net of the city Norrköping, Sweden. The growth of bacterial biomass was measured with two specific bacterial strains, Pseudomonas fluorescens strain P17 and Aeromonas hydrophila M 800, and with the indigenous bacterial population found in the raw water of […]
Publiceringsdatum
Författare
CLAES HERNEBRING, ARNE KRISTENSSON, MÅRTEN LIND, THOR-AXEL STENSTRÖM, ANDERS TJEDER
Nyckelord (Keyword)
assimilable organic carbon (AOC), bacterial growth potential, coagulation, rapid filtration, slow sand filtration, seasonal variations
Nummer
1
Årgång
47
Utgåva
Methods for biological nitrogen and phosphorus removal in domestic wastewater have been developed to a great extent during the last two decades. Thus, it is desirable to design a sewage treatment plant in a flexible way in order to change the mode of operation particularly in an area with rapid population growth. Sunbury Sewage Treatment […]
Publiceringsdatum
Nyckelord (Keyword)
biological nitrogen removal, anoxic pre-denitrification, post-denitrification, internal and external carbon source
Nummer
1
Årgång
47
Utgåva
Direct and indirect impacts on existing wetlands potentially threaten this resource. There is a need for more information about the nature and extent of wetland resources and potential impacts of human activities on wetland systems. This information can then be incorporated into integrated water- and land-use planning efforts at the municipal level. This paper presents […]
Publiceringsdatum
Författare
LORIN REINELT, REINHOLD CASTENSSON, CLAES SVEDLINDH and BENGT LEWIN
Nyckelord (Keyword)
wetland management, integrated planning, land-use, nutrient removal, wetland filter, geographic information system (GIS).
Nummer
1
Årgång
47
Utgåva
A study has been made of two digestion procedures for the conversion of organically bound phosphorus to orthophosphate. The aim of the study was to establish if the procedures are applicable to pulp and paper mill effluents. The procedures selected were the standardized peroxodisulphate method and a method using strong acid for the digestion. The […]
Publiceringsdatum
Författare
BRITA STARCK and RISTO JÄRVINEN
Nyckelord (Keyword)
phosphorus, analysis, test methods, pulp mill effluent, paper mill effluent.
Nummer
2
Årgång
47
Utgåva
The aeration zone forms in the course of the infiltration intake operation as a result of basin floor clogging due to silt build-up. This zone was found to have a noticeable contribution to the hydraulics of the infiltration water intake. The aeration zone effect was investigated on a modified infiltration water intake model. The model […]
Publiceringsdatum
Författare
PIOTR KOZAKOWSKI
Nyckelord (Keyword)
groundwater, aeration zone, infiltration, water intake
Nummer
2
Årgång
47
Utgåva
In the county of Göteborg and Bohus 90 % of the 740,000 inhabitants are dependent on municipal water, mainly from surface water resources. However, the number of groundwater wells exceeds that of surface water supplies, supporting the most densely populated areas. In spite of high vulnerability to pollution and lack of alternative water in case […]
Publiceringsdatum
Författare
SVEN SWEDBERG
Nyckelord (Keyword)
protection areas, water supplies, geohydrology.
Nummer
2
Årgång
47
Utgåva
The use of pond systems for wastewater treatment is reviewed, especially with respect to the use of chemical precipitation. A field study was conducted at the pond system of Funäsdalen where lime is added to the wastewater. The removal of organic matter (CODCr) and phosphorus was investigated during a range of well-controlled wastewater detention times. […]
Publiceringsdatum
Författare
JORGEN HANÆUS
Nyckelord (Keyword)
wastewater treatment, lagoons, ponds, lime precipitation, phosphorus removal, detention rime.
Nummer
2
Årgång
47
Utgåva
In this paper the historical background to the process biological phosphorus removal is presented. The biochemical mechanism and future research work are discussed. Sammanfattning I föreliggande artikel presenteras den historiska bakgrunden till processen biologisk fosforavskiljning. Processens biokemiska mekanism och framtida FoU arbete diskuteras.
Publiceringsdatum
Författare
ANDERS HILMER, PER JOHANSSON and HANS CARLSSON
Nyckelord (Keyword)
biological phosphorus removal, nutrient removal
Nummer
2
Årgång
47
Utgåva
Experiments with three different phosphorus loadings have been conducted in pilot-scale. During an experimental period of 24 hour with normal loading the effluent concentration of PO4-P was stabile around 0.1 mg/1. The results show that even if the phosphorus loading is increased up to four times or if 60 % of a 24 h load […]
Publiceringsdatum
Författare
PER JOHANSSON, HANS CARLSSON and ANDERS HILMER
Nyckelord (Keyword)
biological phosphorus removal, nutrient removal.
Nummer
2
Årgång
47
Utgåva
In november 1990 a new pilot plant for combined biological phosphorus- and nitrogen removal was started up at Sjölunda sewage treatment plant in Malmö. As a complement to the investigations in the pilot plant, laboratory tests were carried out in cooperation with Sjölunda during the autumn and winter 1990-91. The aims of this work were: […]
Publiceringsdatum
Författare
HANS CARLSSON, ANDERS HILMER and PER JOHANSSON
Nyckelord (Keyword)
biological phosphorus removal, nutrient removal.
Nummer
2
Årgång
47
Utgåva
In november 1990 a new pilot plant for combined biological phosphorus and nitrogen removal was started up at Sjölunda sewage treatment plant in Malmö. So far (May 1991) the pilot plant studies have been focused on simultaneous phosphate uptake and denitrifikation. The results clearly show that it is possible to induce phosphate accumulating bacteria, under […]
Publiceringsdatum
Författare
HANS CARLSSON, ANDERS HILMER and PER JOHANSSON
Nyckelord (Keyword)
biological phosphorus removal, nutrient removal.
Nummer
2
Årgång
47
Utgåva
Biological phosphorus and nitrogen removal has been implemented in full-scale at the wastewater treatment plant in Dalby. An investigation of the performance of the process has been conducted during the later half of 1990 and the beginning of 1991. The results from the investigation show that is possible to run a combined biological phosphorus and […]
Publiceringsdatum
Författare
PER JOHANSSON, HANS CARLSSON and ANDERS HILMER
Nyckelord (Keyword)
biological phosphorus removal, nutrient removal
Nummer
2
Årgång
47
Utgåva
Sludge accumulation techniques in pond systems for wastewater treatment, particularly those using chemical precipitation, were reviewed. The chemical sludge at Bruksvallarna treatment plant, a ten year old chemical precipitation pond using alum (AVR), was investigated with respect to volume and content of total solids and its volatile fraction. The volume of the primary sludge was […]
Publiceringsdatum
Författare
JORGEN HANÆUS
Nyckelord (Keyword)
wastewater treatment, lagoons, ponds, chemical precipitation, sludge accumulation.
Nummer
3
Årgång
47
Utgåva
The stability of an accumulated lime sludge after termination of lime addition was investigated at the Funäsdalen wastewater pond system in Sweden. The lime addition was terminated for 53 h and then resumed. pH decreased from approximately 12.0 to a maximum of 7.0 at the inlet and 10.0 at the outlet end of the ponds. […]
Publiceringsdatum
Författare
JÖRGEN HANÆUS
Nyckelord (Keyword)
wastewater treatment, lagoons, ponds, chemical precipitation, sludge accumulation, lime sludge.
Nummer
3
Årgång
47
Utgåva
The present eutrophic status of Lake Eastern Ringsjön in Southern Sweden can be predicted using a simple mass balance model based on 2 trophic levels. The system was modelled using growth and mortality kinetics for fish and plankton, and sediment-fish-water interactions. The model predicts the transition to eutrophic lake from a stable oligotrophic state in […]
Publiceringsdatum
Författare
HARALD SVERDRUP, PER WARFVINGE, and STELLAN F. HAMRIN
Nyckelord (Keyword)
Lake Ringsjön, modelling, eutrophication, critical load
Nummer
3
Årgång
47
Utgåva
A program to chart the sources for undesirable contaminants in the influent water to Ryaverket was started in 1988. Stage one was a study of domestic sewage. Two residential areas in Gothenburg were chosen and sewage water was collected on four occasions during the year, as 24 h flow proportional samples. These were analysed together […]
Publiceringsdatum
Författare
AN MATTSSON, INGER AVERGÅRD, and PETER ROBINSON
Nyckelord (Keyword)
Gothenburg, waste water treatment plant, domestic sewage, residential areas, analytical program, heavy metals, priority pollutants.
Nummer
3
Årgång
47
Utgåva
Okome samhälle har ca 180 personer vilka är anslutna till reningsanläggningen som utgöres av 2 st biologiska dammar. Dammarna anlades i mitten på sextiotalet och drevs konventionellt fram till 1986. Reningsanläggningen kompletterades sedan med kalkfällning och kalksilon med doseringsutrustning placerades mellan första och andra dammen. Reningsresultaten för åren 1987-1990 visar att anläggningen har fungerat bra. […]
Publiceringsdatum
Författare
ROLF JONSSON
Nummer
4
Årgång
46
Utgåva
The paper deals with a research programme that the Norwegian environmental control authorities have established in order to be able to recommend how the municipal discharges of nutrients to the North Sea may be reduced by 50 % within 1995. The strategy is to ensure phosphorus removal by chemical treatment for all plants > 5,000 […]
Publiceringsdatum
Författare
H. ØDEGAARD, B. PAULSRUD, T. BILSTAD, and J. E. PETTERSEN,
Nummer
4
Årgång
46
Utgåva
Two concepts for nitrogen removal using submerged biological filters are discussed, namely pre-denitrification followed by combined precipitation and pre-precipitation followed by post-denitrification. The preliminary design basis is presented, together with a design example and cost figures. Pre-denitrification is the preferred method for moderate nitrogen removal efficiencies (70 %) or if the wastewater is very dilute […]
Publiceringsdatum
Författare
BJØRN RUSTEN
Nyckelord (Keyword)
submerged biological filters, nitrification, pre-denitrification, post-denitrification, design example.
Nummer
4
Årgång
46
Utgåva
During the last two decades, wastewater treatment in systems combining conventional biological processes and hydroponics has been tried at several locations. In this article, six different systems are described and their treatment results compared. Five systems were found in literature, and the sixth system was constructed and operated by the microbiology group at KTH. These […]
Publiceringsdatum
Författare
ANNA NORSTRÖM,
Nyckelord (Keyword)
wastewater treatment, hydroponics, BOD, nitrogen, phosphorus, greenhouse.
Nummer
2
Årgång
61
Utgåva
Problems associated with the amount of dissolved organic carbon (DOC) in drinking water treatment are very common. They range from the very obvious ones like treated water taste and odour and appearance, to the less understood disinfection by-product formation, bacterial regrowth in distribution network, exhaustion of activatedcarbon, membrane fouling and increased coagulation chemical demand. Ion […]
Publiceringsdatum
Författare
JARMO SALLANKO, VIRVE MERISALO, MARIN SLUNJSKI
Nyckelord (Keyword)
water treatment, ion exchange, MIEX, DOC, TOC.
Nummer
2
Årgång
61
Utgåva
A competitive system for stormwater treatment should provide efficient particle removal, small footprint, rapid start-up, robustness, cost effectiveness and flexibility. Chemical pre-treatment followed by microscreening could fulfil these requirements. Thus the potential in such a system was investigated within the framework of a project involving Kemira Kemi AB, Hydrotech AB and the Department of Water […]
Publiceringsdatum
Författare
MICHAEL LJUNGGREN, BRITT NILSSON, RUNE STRUBE,
LENNART JÖNSSON and JES LA COUR JANSEN
Nyckelord (Keyword)
stormwater treatment, micro screening, chemical pre-treatment, disc filtration, drum filtration.
Nummer
2
Årgång
61
Utgåva
The influence of extensive sedum-moss green roofs on runoff water pollution loads was studied for four full scale installations located in southern Sweden. The aim of the study was to ascertain whether the green roof behaves as a sink or a source of pollutants on annual basis and if runoff quality depends on a roof’s […]
Publiceringsdatum
Författare
JUSTYNA CZEMIEL BERNDTSSON och LARS BENGTSSON
Nyckelord (Keyword)
Extensive green roofs; heavy metals; nutrients; runoff pollution load; urban.
Nummer
2
Årgång
61
Utgåva
Investigations and studies of documentation show that the situation for the fish and the water quality in the Göteborg canals are better than 100 years ago thanks to the early construction and successive improvements of the sewer system. The river Göta älv has nowadays the greatest influence of the water quality in the canals due […]
Publiceringsdatum
Författare
SVEN MATHIASSON, BERNT PERSSON, MIKAEL ADRIAN, EVA EKSTEDT,
Nyckelord (Keyword)
canal water quality, sediment investigations, improvements in sewer system, fish species, substances
in fish.
Sammanfattning
Nummer
2
Årgång
61
Utgåva
The Emå River is one of the largest catchments in South Sweden. Efforts are made to develop sustainable tourism in the area. Recreational fishing is an important activity, that will have a potential to grow. The Emå River has a special and famous attraction, namely two species of salmon (salmo trutta and salmo salar) of […]
Publiceringsdatum
Författare
MARIANNE LÖWGREN
Nyckelord (Keyword)
Emån, avrinningsområde, turistfiske, samhällsekonomisk lönsamhet, resekostnadsmetoden
Nummer
2
Årgång
61
Utgåva
The oxidation kinetics of manganese in a sandfilled column has been studied. The oxidation pathways can be both chemical and microbiological. The rate limiting step during chemical oxidation of manganese is the autocatalysis of manganese (II). The time to half the manganese(II) concentration from 1,1 to 0,55 mg/l at pH 8,5 was calculated to 30 […]
Publiceringsdatum
Författare
CARNA PERSSON1, MARIE LINDE, PER WARFVINGE och KENNETH M PERSSON
Nyckelord (Keyword)
Michaelis-Menten kinetics, manganese oxidation, sand filtration.
Nummer
1
Årgång
61
Utgåva
Nynäshamn community has upgraded the main wastewater treatment plant by adding an activated sludge stage, in order to handle septic sludge emanating from the southern suburban area of Stockholm. The upgraded plant was taken into operation in 2003.The plant was earlier based on a treatment chain containing pre-treatment, chemical precipitation and a constructed wetland. The […]
Publiceringsdatum
Författare
JÖRGEN MÅHLGREN och STIG MORLING
Nyckelord (Keyword)
Nitrogen, phosphorus, nitrification, SBR, septic sludge, wetland.
Nummer
1
Årgång
61
Utgåva
When sludge bulking occurred in the new wastewater treatment plant for the abattoir in Kalmar, a quick solution to inhibit and harm the filamentous organism Type 021N was to be found. Five different kinds of chemicals (NaOCl, H2O2, FeCl3, PAX-XL60 and Ecofloc) were tested in two short term lab-tests. Each chemical was first tested with […]
Publiceringsdatum
Författare
REGINE HAKER and LINDA JONSSON
Nyckelord (Keyword)
Type 021N, filamentous bacteria, NaOCl, H2O2, FeCl3, PAX-XL60, Ecofloc, sludge bulking,
abattoir wastewater.
Nummer
1
Årgång
61
Utgåva
The development of drinking water supply in the early industrial cities in Great Britain is reviewed. The special feature of slow sand filtration, that was developed in Glasgow in the very beginning of the 19th century and diffused to the rest of Great Britain during the first half of the 19th century is described in […]
Publiceringsdatum
Författare
KENNETH M PERSSON
Nyckelord (Keyword)
Slow sand filtration, water supply history, London, Glasgow, James Simpson, Thomas Telford.
Nummer
1
Årgång
61
Utgåva
The strategic choice between different future solutions of sewage treatment in the area and village of Getinge has been evaluated from economical and environmental viewpoints. The study could identify three alternative solutions for the treatment of the sewage, which were compared from operational, economical and environmentalpoints of view. The first alternative, A, described the present […]
Publiceringsdatum
Författare
MATTIAS SALOMONSSON, MARIE GUNNARSSON,
KLAS VON SETH , CHRISTINA JÖNSSON och KENNETH M PERSSON
Nummer
1
Årgång
61
Utgåva
Phosphorus release batch tests can be used for evaluation of an activated sludge process with enhanced biological phosphorus removal (EBPR or bio-P). The test method is described and different aspects of the result evaluation are discussed. The concentration of dissolved phosphorus in a sample from the activated sludge is followed during an anaerobic period within […]
Publiceringsdatum
Författare
EVA TYKESSON and JES LA COUR JANSEN
Nyckelord (Keyword)
Batch tests, EBPR, phosphorus release.
Nummer
1
Årgång
61
Utgåva
High demands for phosphorus removal in Sweden result in extensive use of chemicals for precipitation. This has a negative environmental impact. A way to reduce or eliminate the use of chemicals is to use biological phosphorus removal. However, municipal wastewaters normally contain too low concentrations of easily biodegradableorganic substances to make this process work satisfactory.One […]
Publiceringsdatum
Författare
ERIK SÄRNER, CHRISTER JONASSON och MICHAEL PETERSSON
Nyckelord (Keyword)
wastewater treatment, biological phosphorus removal, sludge hydrolysis.
Nummer
4
Årgång
60
Utgåva
Surface water microalgae samples were collected during the ice-free period in a small subarctic wastewater stabilization pond system, complemented with chemical precipitation during the winter period (fellingsdam), and serving 310 persons. In the primary pond microalgae dominance alternated between the CryptophyteCryptomonas and green algae (Chlorophyta). In the second and third pond the general pattern was […]
Publiceringsdatum
Författare
ERIK GRÖNLUND, ERICA JOHANSSON, JÖRGEN HANÆUS2 & STEFAN FALK
Nyckelord (Keyword)
phytoplankton, sewage, oxidation pond, lagoon, fellingsdam, cold climate, EC directive.
Nummer
4
Årgång
60
Utgåva
In a comparative substance flow analysis two wastewater management scenarios in the Swedish town of Surahammar were assessed – a Conventional Scenario vs. a Separating Scenario. The study was restricted to a selection of 16 representative hazardous substances, including metals and organic compounds. Quantitative data of the selected hazardous substances – their presence in grey- […]
Publiceringsdatum
Författare
HELENA PALMQUIST
Nyckelord (Keyword)
Wastewater management, SFA, hazardous substances, metals, barrier, chemical risk assessment.
Nummer
4
Årgång
60
Utgåva
The EU Water Directive (2000/60/EG) refers to 1991/271/EEC in regards to runoff water (storm water) as a type of sewage water. The EU Water Directive also points out the urban road runoff water as a pollutant source for ground water. Elevated levels of pollutant concentrations can be found in runoff water from catchment areas with […]
Publiceringsdatum
Författare
MAGNUS HALLBERG och GUNNO RENMAN
Nyckelord (Keyword)
Highway runoff water, storm water, initial flow pulse, Polonite®, sedimentation, sludge.
Nummer
4
Årgång
60
Utgåva
A summary is given on the water and wastewater situation in Iraq before the Gulf war 1991, the situation after the Gulf war and the recent effects of the conflict 2003. The access of safe water was halved in certain counties after March 2003 and half of the sewage works was out of function with […]
Publiceringsdatum
Författare
NASIK AL-NAJJAR och BENGT HULTMAN
Nyckelord (Keyword)
Iraq, sewage treatment, water administration, water conflicts, water treatment.
Nummer
4
Årgång
60
Utgåva
A city is an alien element in natural ecological systems. All anthropogenic systems become monocultures with open material and energy systems. Overexploitation of natural resources (raw materials, water), or enrichment of residuals (pollutions) are the consequences. Today it is clear that urban areas must be kept in some kind of equilibrium which is acceptable for […]
Publiceringsdatum
Författare
JANUSZ NIEMCZYNOWICZ
Nummer
1
Årgång
46
Utgåva
A high resolution hydrodynamic model is used to estimate fluxes between boxes in a coarse compartment model. The latter model may include complex biogeochemical processes, here exemplified by dispersion of radionuclides released from a nuclear power plant. The water recipient – Öregrund Grepen – is assumed non-stratified and the circulation to be mainly winddriven. The […]
Publiceringsdatum
Författare
LARS GIDHAGEN and LARS RAHM
Nyckelord (Keyword)
Box model, circulation model, coastal recipient, dispersion, radionuclides, Öregrund Grepen.
Nummer
1
Årgång
46
Utgåva
Lakes have an important impact on element mass transport. The reduced velocity results in an increasing sedimentation and chemical and biological processes have time to influence the transport. Hydrochemical models can be helpful in the study of the importance of different processes. In this study we present simulated concentrations and mass transport of zinc, copper […]
Publiceringsdatum
Författare
PER SANDÉN and BENGT CARLSSON
Nyckelord (Keyword)
mass transport, lake, zinc, copper, cadmium, hydrochemical model.
Nummer
1
Årgång
46
Utgåva
Open black top pavement has advantages over usual black top in view of economics, accidental statistic and environmental factors. Noticed about the environmental advantages are lower load on waste water filtration plants, lowered risk for spillway overflow, less pollution to recipients, lowered noice levels for traffic and sustained ground water balance. The risk for clugging […]
Publiceringsdatum
Författare
KARIN GÖRANSSON and HELENA JONSSON
Nyckelord (Keyword)
environment, ground water balance, ground water pollution, open top pavement, pavement, unit superstructure.
Nummer
1
Årgång
46
Utgåva
Sulphide toxicity due to high concentrations of sulphurous compounds in some industrial wastewaters results in difficulties when using the favourable anaerobic treatment; it even makes anaerobic treatment impossible. Today, several methods are available for control of sulphide toxicity: heavy metal sulphide precipitation, addition of alkali to raise pH and thereby convert the toxic H2S to […]
Publiceringsdatum
Författare
ERIK SÄRNER
Nyckelord (Keyword)
anaerobic treatment, sulphide, toxicity, toxicity control, pretreatment.
Nummer
1
Årgång
46
Utgåva
A large scale pilot treatment system has been used to study the effect of limiting the dissolved oxygen concentration in intermittent cycle extended aeration activated sludge (ICEAS) system on nutrient removal. The objective was to develop operating data and to establish and verify that operational conditions conductive to biological phosphorus removal can be maintained. It […]
Publiceringsdatum
Författare
ANDERS WISTROM
Nummer
2
Årgång
46
Utgåva
Nitrogen reduction by denitrification in anoxic zones is increasingly used worldwide within activated sludge processes (Phosphorus removal in anaerobic zones have similar requirements). Mixing is a necessary base for good process results and involves several contradicting requirements. The design of the zones and the mixing equipment should, when possible, be done simultaneously to achieve good […]
Publiceringsdatum
Författare
STAFFAN RISSLER och CHRISTER GRÄBNER
Nyckelord (Keyword)
mixing, anoxic zones, denitrification, anaerobic zones, mixing requirements, design.
Nummer
2
Årgång
46
Utgåva
Because of the slow growth of the nitrification bacteria at low temperature, nitrogen reduction normally requires long hydraulic retention times during winter time. Important for the nitrification process is the aerated sludge age. Factors influencing the sludge age are aerated volume, mixed liquid suspended solids concentration, organic load and sludge yield. In an existing plant […]
Publiceringsdatum
Författare
TORSTEN PALMGREN
Nummer
2
Årgång
46
Utgåva
This paper deals with treatment of wastewater in low temperature regions of Scandinavia. The emphasis is on treatment of wastewater from small communities and recreation areas. The basic principles of chemical and biological treatment plants are described. Case studies of different types of wastewater treatment plants are presented, including treatment results and the special prerequisities […]
Publiceringsdatum
Författare
BJØRN RUSTEN and BJARNE PAULSRUD
Nyckelord (Keyword)
low temperature, biological treatment, chemical treatment, precipitation ponds, submerged aerated biological filters, full scale performance.
Nummer
2
Årgång
46
Utgåva
In sewage treatment plants several types of filters are used, most of which are originally constructed for water treatment. As a matter of fact, all filter constructions are equally suitable, when the water has been prepared in a correct way for a particular filter or, reversed, the right filter is chosen for a particular water. […]
Publiceringsdatum
Författare
ZDENEK VOR
Nyckelord (Keyword)
surface filtration, in-depth filtration, singel bed, multi-layer bed, upward filtration, backwash.
Nummer
2
Årgång
46
Utgåva
Recent biogeochemical studies suggest that denitrification in groundwater is widespread, and that there is a close coupling between denitrification and the cycling of groundwater iron. The possibility to use this coupling for in situ treatment of iron-rich groundwater has been studied in a full-scale field test at Knislinge Waterworks, Ö. Göinge Community. Under a 50 […]
Publiceringsdatum
Författare
VLADIMIR VANEK
Nyckelord (Keyword)
in situ treatment, groundwater, nitrate, iron, denitrification.
Nummer
2
Årgång
46
Utgåva
This study is concerned with nitrification in the BOD test and how to suppress it. The results show that a significant proportion of the BOD value of biologically treated municipal effluents is due to nitrification and that it can be suppressed by the addition of allylthiourea (ATU). A national survey comprising 298 samples from 35 […]
Publiceringsdatum
Författare
TAPIO RIIHELÄINEN, and BRITA STARCK
Nyckelord (Keyword)
BOD, test method, inhibition, allylthiourea (ATU), effluent.
Nummer
2
Årgång
46
Utgåva
The demand for more efficient wastewater treatment in Sweden and Denmark has increased lately. The demand for nitrogen removal has especially increased in Sweden, where this means that nitrogen has to be removed with 50 % to begin with and 75 % for some areas later on. In Denmark the general requirement is a maximum […]
Publiceringsdatum
Författare
ERIK SÄRNER and PETER THULIN
Nyckelord (Keyword)
nitrogen removal, fullscale plants, pilot plant test, pre-denitrification.
Nummer
3
Årgång
46
Utgåva
The southern part of Halland in south-west Sweden constitutes an area with great risk for nitrogen leakage from agricultural land. This is due to high precipitation, sandy soils and intense animal and crop production. The nitrogen transport in the agricultural rivers Trönningeån and Smedjeån is high but has decreased significantly during the 1980s. Decreasing transport […]
Publiceringsdatum
Författare
LOUISE ELLMAN KARELD, ARNE JOELSSON and LARS STIBE
Nummer
3
Årgång
46
Utgåva
In a fish tank with a build-in upstreams aerobic biological filter (The BIOFISH System), batch-experiments were made to study whether hydrolysis of urea is a limiting step in the conversion of urea to nitrate. Based on frequent grab sampling and analysis of the different forms of nitrogen in the water, calculations were made for the […]
Publiceringsdatum
Författare
LARS J. HEM, GØRIL THORVALDSEN and BJØRNAR EIKEBROKK
Nyckelord (Keyword)
aquaculture, nitrification, urea.
Nummer
3
Årgång
46
Utgåva
The introduction of biological nitrogen removal at many sewage treatment plants in Sweden, particularly those located at coastal regions up to Stockholm archipelagio in the east, is now proceeding primarily by plant trial operation. The deficit of an easily biodegradable carbon source for anoxic denitrification and the cold winter climate are the most characteristic problems […]
Publiceringsdatum
Författare
BERNT ERICSSON
Nyckelord (Keyword)
carbon source, volatile organic acids, anoxic denitrification, acidic sludge digestion, anaerobic enzymatic hydrolysis, two-phase sludge digestion.
Nummer
3
Årgång
46
Utgåva
This project is a summary of the work carried out within the project Liming – Mercury – Cesium in the Örebro county. The basic question is: How is it possible to reduce the mercury and cesium content in fish and the threat of ”blacklisting” presently acute for about ten thousand Swedish lakes? What measures could […]
Publiceringsdatum
Författare
PELLE GRAHN
Nyckelord (Keyword)
mercury, fish, measure, liming.
Nummer
4
Årgång
46
Utgåva
The aim of this paper is to present and discuss some results from the project ”The Coast As a Natural Resource”. The overall aim has been to attempt to develop new scientific criteria, methods and models for the planning of coastal waters. The sensitivity of different coastal areas to nutrient loading (nitrogen and phosphorus) from […]
Publiceringsdatum
Författare
MATS WALLIN and LARS HÅKANSON
Nyckelord (Keyword)
eutrophication, coastal waters, Baltic Sea, fish farms, nitrogen, phosphorus, load models, load diagrams.
Nummer
4
Årgång
46
Utgåva
High concentrations of iron in drinking water, redwater, is a problem in some parts of Gothenburg. Iron concentration is determined in redwater areas by analysis of samples taken out of hydrants. Unfortunately it is very difficult to compare results from different samples and to find tendencies as different methods are used. During the investigation many […]
Publiceringsdatum
Författare
LARS ENANDER
Nyckelord (Keyword)
sampling methods, redwater, water quality, iron concentration, turbidity
Nummer
4
Årgång
46
Utgåva
In many agricultural areas the small streams have been reduced to drainage ditches. This not only has destroyed important natural habitat but has reduced the self cleaning and nutrient reduction ability of agricultural streams. There is now much discussion about how this trend can be reversed in a practical and cost effective way without disrupting […]
Publiceringsdatum
Författare
ROBERT C. PETERSEN JR., LENA B.-M. PETERSEN and JEAN O. LACOURSIERE
Nummer
4
Årgång
46
Utgåva
In this paper the interaction between legislation and municipal administration is focused on the relationship between land use and ground water contamination. In two cases – Vadstena and Kinda – the weak protection of the vulnerable ground water from different land use activities is illustrated. Today the administration is organized for and aimed at handling […]
Publiceringsdatum
Författare
HANS LÖNEGREN
Nyckelord (Keyword)
groundwater protection, land use, legislation, local administration.
Nummer
1
Årgång
45
Utgåva
In areas with intensive agriculture land use conflicts between the agriculture land use interests and the drinking water supply protection interests are frequent. Precise methods for delimitation of Safety Control Areas are urgent. Two delimitation methods are demonstrated. The first one, delimitation by subwatersheds, is based on identifications of local hydrological interrelationships and their significance […]
Publiceringsdatum
Författare
REINHOLD CASTENSSON
Nyckelord (Keyword)
delimitation methods, safety control areas, drinking water supply, non-point pollution, intensive agriculture land use.
Nummer
1
Årgång
45
Utgåva
The water treatment works named Borg delivers drinking water to about 100,000 inhabitants in Norrköping. Raw water is taken from the river Motala ström. Because of the raw water quality there are sometimes problems with bad taste and odour in the purified water. By pollution from a paper pulp factory with chlorine bleachery, situated upstreams […]
Publiceringsdatum
Författare
ANDERS TJEDER, MÅRTEN LIND, ARNE KRISTENSSON and INGVAR STENING
Nyckelord (Keyword)
taste, odour, organic chlorine, AOX granular activated carbon, GAC, GAC filter, mutagenicity.
Nummer
1
Årgång
45
Utgåva
The mathematic models used for trickling filter design today do not give a correct picture of the influence of depth on the process efficiency. The effect of an increased filter depth is overestimated, resulting in an uneconomical design. The design models used are normally based on a first order reaction equation and the most common […]
Publiceringsdatum
Författare
ERIK SÄRNER
Nyckelord (Keyword)
trickling filter, depth, BOD removal, mathematical model.
Nummer
2
Årgång
45
Utgåva
The concentrations of cadmium and lead in water from 280 private wells were determined. The aim of the study was to elucidate if the presence of these metals is a health problem when the water is used as drinking water. The water in many Swedish wells is very acid and is also influenced by the […]
Publiceringsdatum
Författare
TORE STENSTRÖM
Nyckelord (Keyword)
cadmium, lead, well water, ground water, drinking water, health effects, acid rain.
Nummer
2
Årgång
45
Utgåva
The aim of this paper has been to discuss some results and experiences that may be drawn from the project »Environment/Cellulose l», sponsored by the National Swedish Environmental Protection Board. The emissions from pulp bleacheries consist of many complex substances, some of which are identified (like dioxins and chlorophenols), most of which are unknown in […]
Publiceringsdatum
Författare
LARS HÅKANSON, and PER JONSSON
Nyckelord (Keyword)
chlorinated organic materials, EOCl, dioxins, furanes, Bothnian Sea, sediments, impact areas, environmental consequence analysis.
Nummer
2
Årgång
45
Utgåva
The aim of the present study was to determine the pollution load originating from storm water on Lake Växjösjön. Each year about 1,050,000 m3 of storm water are discharged into the lake. Storm water represents a substantial pollution source for the lake and therefore also a main reason for the hypertrophic conditions in the lake. […]
Publiceringsdatum
Författare
RONNY BERNDTSSON, WILLIAM HOGLAND, MAGNUS LARSON, MAGNUS ENELL, LENA WENNBERG, and JAN FORSBERG
Nyckelord (Keyword)
storm water pollution, heavy metals, lake effects.
Nummer
2
Årgång
45
Utgåva
Long-term ice-cover occurring on high-mountain and subarctic lakes as well as on brackish-water seas such as the Gulf of Bothnia promotes certain algae species, well adapted to low-light and low-temperature and/ or heterotrophic nutrition. Such algal species often belong to the dinoflagellates. In the northern Bothnian Sea, as in Lake Torneträsk, dinoflagellates are predominant under […]
Publiceringsdatum
Författare
AGNES MÜLLER-HAECKEL, and NILS ÅKE ANDERSSON
Nyckelord (Keyword)
phytoplankton, ice-cover, dinoflagellates, Bothnian Sea, Lake Torneträsk.
Nummer
2
Årgång
45
Utgåva
Dosing is a common unit operation in water and sewage treatment technology. In that connection it is important to choose reliable and accurate equipment. The article describes different automatical dosing systems, different dosing pumps and claims given when selecting dosing systems. It is also important to design the installation in the right way. Examples for […]
Publiceringsdatum
Författare
ROLF BERGSTRÖM, VIAK AB, and IWAN ZÄTTERQUIST
Nyckelord (Keyword)
dosing, dosing pumps, components for dosing, alternatives for installation, systems for regulation and control.
Nummer
2
Årgång
45
Utgåva
The effect of food to microorganism ratio (F:M) on nitrogen removal in intermittent cycle extended aeration activated sludge (ICEAS) system, has been studied using a large pilot scale treatment system. A basic operation schedule for BOD removal was used in the study. The objective of the study was also to develop data that would provide […]
Publiceringsdatum
Författare
ANDERS WISTRÖM
Nummer
3
Årgång
45
Utgåva
The demand in Denmark for efficient wastewater treatment has increased dramatically lately. Before 1993 most wastewater treatment plants must meet the effluent quality demand 15 mg/1 BOD, 8 mg/l nitrogen and 1.5 mg/1 phosphorus. This means that the nitrogen removal has to be in the order of 70-80 % also at low wastewater temperatures (6-7°C). […]
Publiceringsdatum
Författare
MAGNUS EMANUELSSON
Nyckelord (Keyword)
nitrogen reduction, pilot test, pre-denitrification, chemical precipitation, methanol.
Nummer
3
Årgång
45
Utgåva
Successful treatment of leachates is often found to be difficult with respect to COD and nutrient removal. This paper presents the results of pilot plant tests carried out in situ at the sanitary landfill, Bösarp, operated by the city ofVarberg. The tests were performed by means of SBR-technics. The results have been very encouraging with […]
Publiceringsdatum
Författare
STIG MORLING, and BENNY JOHANSSON
Nyckelord (Keyword)
leachates, SBR-technics, low temperature, concentrated waste waters, nitrogen removal.
Nummer
3
Årgång
45
Utgåva
A large number of measurements and field studies on the quality of combined sewer overflow discharge quality have been carried out during the recent years. These measurements indicate that commonly used calculation methods for determining the pollution load from combined sewer overflows may greatly underestimate the actual load. This is due to the fact that […]
Publiceringsdatum
Författare
RONNY BERNDTSSON, and WILLIAM HOGLAND and MAGNUS LARSSON,
Nyckelord (Keyword)
combined sewer overflow discharge quality, wash-out, pollutants, sedimentation.
Nummer
3
Årgång
45
Utgåva
The intention with this paper is to present one type of operative system for environmental consequence analysis (ECA) for natural aquatic ecosystems, i.e. lakes, rivers and marine areas. The operative system consists of two parts: (1) a ”note system” for ECA, i.e., the scientific framework and concepts and (2) the ”instruments”, i.e., the tools which […]
Publiceringsdatum
Författare
LARS HÅKANSON
Nyckelord (Keyword)
environmental consequence analysis, lakes, rivers, marine areas, eutrophication, contamination, acidification, load diagrams, cost-benefit analysis.
Nummer
3
Årgång
45
Utgåva
In this study remote sensing techniques have been used to quantify total suspended matter (TSM) in the red part of the electromagnetic spectrum. Data from NOAA-AVHRR are used to demonstrate the temporal change of the Glomma river in the northeastern part of the Skagerrak area, whereas LANDSAT-TM shows the detailed spatial coverage. The technique described […]
Publiceringsdatum
Författare
BERTIL HÅKANSSON
Nyckelord (Keyword)
riverplume, remote sensing, suspended matter.
Nummer
4
Årgång
45
Utgåva
The present study shows that a substantial part of the pollutants transported in a river reach is deposited in the sediments (14-47 %). Especially a large part of the transported heavy metals copper, zinc and lead seem to be deposited (47 % for zinc). Mass-balance studies of different pollutants are verified by sediment samples. The […]
Publiceringsdatum
Författare
RONNY BERNDTSSON, and MIKAEL ERLSTRÖM
Nyckelord (Keyword)
water pollution transport, sedimentation, wash-out, heavy metals.
Nummer
4
Årgång
45
Utgåva
This paper deals with ground water acidification and its effect on water supplies in rural areas. The aim was to find solutions to problems caused by ground water acidity. Applications and methods still under development on neutralization techniques adapted for individual use were studied. Insufficient research has been carried out on the necessary filtration systems. […]
Publiceringsdatum
Författare
PAIVI MÄKINEN, and ANNIKA SIPILÄ
Nummer
4
Årgång
45
Utgåva
Due to aesthetical, organoleptic, health related as well as economical and practical reasons, humic substances constitutes a quality problem in drinking water. About 50 % of the Norwegian waterworks exceed the quality standards related to colour. A great effort has been made to find alternatives to the traditional way of humic substance removal, coagulation followed […]
Publiceringsdatum
Författare
BJØRNAR EIKEBROKK
Nyckelord (Keyword)
drinking water, humic substances, treatment processes, treatment costs, coagulation/direct filtration, ion exchange, membrane filtration, ozonation, GAC-adsorption.
Nummer
4
Årgång
45
Utgåva
Water treatment in Denmark is generally based on unpolluted groundwater, where aeration and rapid sand filtration normally suffice. The growing threat of pollution has prompted the industry to investigate into advanced treatment processes. Some unpolluted groundwater resources are difficult to treat. Processes presently in use include stripping, chemical precipitation, biological nitrification, whereas chemical oxydation with […]
Publiceringsdatum
Författare
CHRISTIAN STAMER
Nummer
4
Årgång
45
Utgåva
Yersinia enterocolitica og Campylobacter jejuni/Campylobacter coli er to enteropatogene bakterier som kan overføres med drikkevann. Y. enterocolitica og Y. enterocolitica-lignende bakterier er vanlige overalt i vårt miljø, i dyr, vann og matvarer. Den medisinske betydning er knyttet til noen få serotyper, i Skandinavia særlig serotype 0:3. Svinekjøttprodukter regnes for å være den viktigste smittekilden. Y. […]
Publiceringsdatum
Författare
GEORG KAPPERUD
Nummer
4
Årgång
45
Utgåva
Since stormwater management planning in Canada is included in physical regional planning, the final design of stormwater systems satisfies different economic, environmental, aesthetic and other requirements. Markham symposium 88, described in this paper, is one of several similar meetings during which researchers from different disciplines, hydrologists, city planners, biologists, ecologists and politicians have the opportunity […]
Publiceringsdatum
Författare
JANUSZ NIEMCZYNOWICZ
Nyckelord (Keyword)
stormwater, water management, planning
Nummer
3
Årgång
44
Utgåva
A water sampler comprising a sample device and a separate sample receptacle is presented. The sample receptacle can be sterilized and consists of flexible, exchangeable plastic wall structure located between two rigid circular end bodies. At activation of the sampler the end bodies are pulled away from each other and the sample receptacle is waterfilled. […]
Publiceringsdatum
Författare
LARS BRÄNDSTRÖM and KARSTEN PEDERSEN
Nyckelord (Keyword)
bacteria, sterile, water sampler.
Nummer
3
Årgång
44
Utgåva
The performance of activated sludge treatment plants is usually influenced by input loads as well as by variations in biological and operational factors related to the treatment process. This implies that the assumption that steady-state conditions exist, is seldom true in practice. Conscientious control programs should be preceded by extensive plant studies concerning the variations […]
Publiceringsdatum
Författare
GUSTAVO SALTIEL and PER JOHANSSON
Nummer
3
Årgång
44
Utgåva
Removal of nitrogen from sludge supernatant is one possibility to improve total nitrogen removal efficiency in a sewage treatment plant with about 10 %. The basic treatment gives nitrification and possibility to inoculate the activated sludge process with nitrifiers. This operation improves the plant’s ability to recover nitrification capacity after for instance chock loadings. Denitrification […]
Publiceringsdatum
Författare
BERNDT BJÖRLENIUS
Nummer
3
Årgång
44
Utgåva
Contact filtration is a highly effective process for separation of small, even very small, particles and certain solved materials from water. Dispersion is destabilized before introduction in a filterbed containing granular materials. The separation mechanism is mainly the van der Waal effect and adhesion to bed granules. The process is used in purification of drinking […]
Publiceringsdatum
Författare
ZDENEK VOR
Nyckelord (Keyword)
contact filtration, drinking water, sewage, industrial waste water, up-flow sand filter.
Nummer
3
Årgång
44
Utgåva
In Hörnefors, a village at the east coast of northern Sweden, a new ground water well almost free from detectable bacteria was connected to the old water distribution system, and chlorination was withdrawn. Within four months bacteriological controls indicated the presence of bacterial counts exceeding official limits in drinking water, and an epidemiological survey showed […]
Publiceringsdatum
Författare
BO HELLBERG, and STURE LÖFGREN
Nyckelord (Keyword)
drinking water, bacteriological water control, epidemiology, Yersinia enterocolitica.
Nummer
4
Årgång
44
Utgåva
Eutrophication is one of the serious pollution problems in the Baltic Sea Area. The nutrients originate from different sources. Agriculture is one of the important sources. In 1985 The Helsinki Commission decided to establish an agriculture working group. The aim of the group was to draft recommendations on reduction in agricultural pollution. The working group […]
Publiceringsdatum
Författare
GUNVER BENNEKOU
Nummer
4
Årgång
44
Utgåva
A conceptual model for simultaneous computation of runoff and inorganic leaching from forests, arable lands and lakes has been developed and tested. The model has been verified against data from the Ekenäs area in the county of Södermanland in SE Sweden. The aim is to develop a model which includes the most important factors controlling […]
Publiceringsdatum
Författare
MAJA BRANDT, and BARBRO ULÉN
Nyckelord (Keyword)
nitrogen transport, water quality modelling
Nummer
4
Årgång
44
Utgåva
The addition of plant nutrients to the sea is today one of the most important environmental problems. It is of the outmost importance that measures taken against such discharges will be as cost effective as possible. A computer based mathematical model is described to calculate the transport of phosphorus to the recipient. The drainage area […]
Publiceringsdatum
Författare
STURE LARSSON, and KATARINA JOHANSSON
Nyckelord (Keyword)
phosphorus transport, water quality modelling.
Nummer
4
Årgång
44
Utgåva
A fullscale plant applicating the Karl Dunkers’ system for combined treatment of separate storm water and lake water is since 1981 operating in the northern part of the lake Rönningesjön, close to Stockholm. The treatment is executed in three simultaneous steps: 1) flow balancing in tanks floating in the lake, 2) phosphorus removal using Fe […]
Publiceringsdatum
Författare
SVANTE LUNDKVIST, and HANS SÖDERLUND
Nummer
4
Årgång
44
Utgåva
Swedish environmental policies have aimed at connecting even small point source discharges to tertiary treatment plants, either by large scale collection and treatment systems or by small separate plants. The cost-effectiveness of the strategy for a number of urban areas with less than 1,000 inhabitants was evaluated in one municipality (115,000 inhabitants) in the south […]
Publiceringsdatum
Författare
KARIN SUNDBLAD, MARIANNE LÖWGREN and HANS B. WITTGREN
Nyckelord (Keyword)
artificial wetlands, cost-effectiveness, nutrient recycling, on-site wastewater treatment.
Nummer
4
Årgång
44
Utgåva
The concentrations of chloroform, carbon tetrachloride, dibromochloromethane, bromoform, methyl chloroform and perchloroethylene have been determined at 13 stations in the area of the petrochemical centre at Stenungsund. The concentrations of methyl chloroform and perchloroethylene confirm a water exchange of Askeröfjorden of 5-15 % per day. Large variations of the halocarbon concentrations at depths of 1 […]
Publiceringsdatum
Författare
KATARINA ABRAHAMSSON, DAVID DYRSSEN, GABRIELLA JOGEBRANT and MIKAEL KRYSELL
Nyckelord (Keyword)
petrochemical industries, effluents, fjord water exchange, mixing, halocarbons, tracers.
Nummer
1
Årgång
45
Utgåva
Asketjern/Blaker waterwork (ca. 5,500 persons) was until 1985 supplied with acid, soft surface water with a high humus concentration. The distribution system consists mainly of asbestos cement and cast iron pipes, and severe corrosion occurred. pH near 11 was measured at end points of asbestos cement pipes. There was no treatment for corrosion control. From […]
Publiceringsdatum
Författare
MONA WEIDEBORG and AUD-INGER RASMUSSEN
Nyckelord (Keyword)
waterwork, corrosion, water quality
Nummer
1
Årgång
45
Utgåva
Reverse osmosis was found to reduce >90 % of the nitrate content in ground water from two different wells. Alternatives like ion exchange (e.g. CARIX) were found in literature.
Publiceringsdatum
Författare
JÖRGEN WESTERLUND, MATS NYMAN, and ROBERT HÖGLUND
Nyckelord (Keyword)
reverse osmosis, ground water, spiralwound module
Nummer
1
Årgång
45
Utgåva
Production of drinking water by slow filtration is an old method getting new aspect nowadays. Filtration mechanism is on principle the same as in other granular filters. Dispersed matter is destabilized by biochemical activity of microorganisms. Separated organics retained in the filter for several months/years are degradated by aerobic digestion instead of being removed by […]
Publiceringsdatum
Författare
ZDENEK VOR
Nyckelord (Keyword)
humic substance, aluminium, odour and taste, separation mechanism.
Nummer
1
Årgång
45
Utgåva
This paper introduces different intermittent biological treatment methods of waste water to the Swedish public. Intermittent methods are widespread internationally, but seldom used in Sweden. The following methods are presented: – the Intermittent Cycle Extended Aeration process (ICEAS) – the phased isolation ditch process, namely the ”biodenitrosystem” – the Sequencing Batch Reactor process (SBR). The […]
Publiceringsdatum
Författare
STIG MORLING
Nyckelord (Keyword)
sequencing, Batch Reactor, nitrogen removal, Intermittent treatment methods
Nummer
1
Årgång
45
Utgåva
The current debate concerning land application of sewage sludge is briefly reviewed. Of major concern in the public debate today is the presence of organic micro-pollutants in the sludge. Sludge quality data from Swedish plants related to trends in contents of heavy metals, PCB and DDT are discussed. A large decrease can be noted. This […]
Publiceringsdatum
Författare
OLA PALM, ALF-GÖRAN DAHLBERG, and HANS HOLMSTRÖM
Nyckelord (Keyword)
sewage sludge, heavy metals, organic micro-pollutants.
Nummer
1
Årgång
45
Utgåva
The spreading of heavy metals from a metal rich deposit in surface waters is examined from measured concentrations in draining rivers and a series of lakes downstream the deposit, during a period of 3 years. The decreasing concentrations observed in the lakes appear to be the result of mixing of effluents from the deposit with […]
Publiceringsdatum
Författare
KARSTEN HÅKANSSON, BO BERGBÄCK, STEFAN KARLSSON and BERT ALLARD
Nyckelord (Keyword)
cadmium, copper, lead, zink, drainage system
Nummer
1
Årgång
45
Utgåva
The present study has shown that surface water, groundwater and soil, even in areas far from industrial emissions, contain large pools of adsorbable, organic halogens (AOX). Gel chromatographic fractionations and studies of adsorption of AOX on activated carbon at different pH values indicated that a considerable fraction of the organohalogens are associated with high molecular […]
Publiceringsdatum
Författare
GUNILLA ASPLUND, ANDERS GRIMVALL and BO WIGILIUS
Nyckelord (Keyword)
natural production, organohalogens, AOX, soil, water, humic substances.
Nummer
1
Årgång
45
Utgåva
Volatile organics in bottled waters from Sweden were analysed by stripping enrichment followed by gas chromatography (GC/ECD and GC/FID) and chromatographic sniffing. The GC/FID analyses showed that measurable amounts of organic substances leached from plastic (PET) bottles and Tetra-Brik packages. Chromatographic sniffing showed that the earthy or musty off-flavours, often found in tap water were […]
Publiceringsdatum
Författare
ROGER SÄVENHED and ANDERS GRIMVALL
Nyckelord (Keyword)
mineral water, trace organics, off-flavours, stripping analysis, adsorbable organic halogen.
Nummer
1
Årgång
45
Utgåva
The critical load, defined as the maximum load of acid deposition that will not cause certain adverse effects, is calculated by using a mass balance for alkalinity for the catchment, forest soil or lake system considered. This simple method estimates the critical load from site characteristics such as mineral composition, bioremoval of base cations and […]
Publiceringsdatum
Författare
HARALD SVERDRUP
Nummer
3
Årgång
44
Utgåva
Systematic recordings of alkalinity may give early warning of change in acidification status. Fixed endpoint titration is a method well suited for routine measurements. But, standardized procedures for alkalinity titration do not take into account errors in endpoint pH caused by stirring of the samples. The magnitude of this effect depends on individual and variable […]
Publiceringsdatum
Författare
DAG HONGVE and KJELL HEGNA
Nyckelord (Keyword)
alkalinity titration, acidification, pH-error caused by stirring
Nummer
4
Årgång
43
Utgåva
The intention with the trial operation at the sewage treatment plant Västra Stranden, Halmstad was to investigate what the nitrogen removal would be during summer conditions after extension of the tanks for anoxic pre-denitrification to the double. The flow to the three separate activated sludge units was distributed in such a way that two of […]
Publiceringsdatum
Författare
BERNT ERICSSON
Nyckelord (Keyword)
anoxic zone, pre-denitrification, post-denitrification, carbon source, nitrification, computer control
Nummer
4
Årgång
43
Utgåva
New process technologies have considerably improved the specific nitrification capacity per unit area of immersion percolating filters. The operating principle is based on strict separation of the carbon reduction and nitrification processes together with uniform substratum supplies in cascade plants. These processes lake the immersion percolating filter viable even for high capacity plants. The method […]
Publiceringsdatum
Författare
GERT NYHUIS
Nummer
4
Årgång
43
Utgåva
The dominating role of phosphorus as limiting nutrient in fresh water is well documented, while the situation in coastal areas and the open sea is less clear. In the marine environment phosphorus (P) and nitrogen (N) availability appears to be more balanced to the nutrient requirements of algae. When nutrient limitation is discussed, it is […]
Publiceringsdatum
Författare
TORSTEN KÄLLQVIST
Nummer
1
Årgång
44
Utgåva
The controversy whether nitrogen or phosphorus limits phytoplankton growth in Swedish coastal and sea areas has been ongoing since the early 1970’s. Today there is a consensus among scientists that nitrogen is the key factor controlling phytoplankton growth in the Baltic proper, Kattegat and Skagerrak and phosphorus in the Bothnian Bay, while the Bothnian Sea […]
Publiceringsdatum
Författare
ULF LARSSON
Nyckelord (Keyword)
nutrient limitation, eutrophication, Sweden, coastal areas, sea areas, Baltic Sea, Kattegat.
Nummer
1
Årgång
44
Utgåva
Function and stability of five freshwater model ecosystems were studied during three months in 1985. Two of the models had no fish and the other three had fishpopulations of different kinds. The ecosystems intended to be models of a Lobelia/Isoetes-community in the oligotrophic lake Nedre Fryken. Most of the material for the model ecosystems was […]
Publiceringsdatum
Författare
IRENE BOHMAN
Nummer
1
Årgång
44
Utgåva
Introduction of energy forestry in Sweden is likely to occur in the beginning of the 1990’s. To describe how an intensively cultivated willow forestry might affect the water resources and what the irrigation need might be, the evaporation and water balance were simulated by a reasonably simple, yet physically realistic model. Average evaporation during the […]
Publiceringsdatum
Författare
ANDERS LINDROTH
Nyckelord (Keyword)
energy forest, evaporation, Salix, simulation, transpiration.
Nummer
1
Årgång
44
Utgåva
The Askerö fjord receives wastewater from petrochemical industries located in Stenungsund on the Swedish west coast. During the autumn of 1987 an investigation was performed where the physiological status of common mussels (Mytilus edulis) which had been caged in this area was studied. The measured physiological parameters were: feeding rate, absorption efficiency, respiration and ammonia […]
Publiceringsdatum
Författare
KERSTIN MAGNUSSON, MATZ BERGGREN and ÅKE GRANMO
Nummer
1
Årgång
44
Utgåva
The Gran procedure described by Molv©¡rsmyr and Lund (1983) was modified and automated for the routine analysis of strong and weak acids in freshwater. The titrations are carried out by coulometric generation of hydroxide ions in the pH range 3.6-10.3. The method measures the amount of non-volatile strong and weak acids in freshwater with a […]
Publiceringsdatum
Författare
EIRIN J. S. R¨ªGEBERG and TORSTEN KÄLLQVIST
Nyckelord (Keyword)
Grain titration, coulometry, humic lakes, organic anions
Nummer
2
Årgång
44
Utgåva
Most Danish lakes and rivers are seriously eutrophicated and still greater areas of the coastal waters show oxygen depletion in the bottom layers during summer periods. Nitrogen washout from farmland and nitrogen, phosphorus and organic matter originating from domestic and industrial sewage, both contribute to increased phytoplankton and periphyton production and oxygen demands for decomposition. […]
Publiceringsdatum
Författare
P. C. DALL, C. LINDEGAARD and P. M. JONASSON
Nummer
2
Årgång
44
Utgåva
Attempts to reduce the nitrogen content in wastewater at the sewage treatment plant Slottshagen in Norrköping have been accomplished during 1987. The plant, which takes care of the sewage from about 100,000 persons, was built for sedimentation, biological purification with activated sludge and chemical purification through post-precipitation in a separate step. After conversion of the […]
Publiceringsdatum
Författare
SVEN-GUNNAR LARSSON, LENNART NORDH, ANDERS TJEDER and ÅKE HAGLUND
Nyckelord (Keyword)
nitrification, pre-denitrification, post-denitrification, anoxic zone, starch.
Nummer
2
Årgång
44
Utgåva
Studies of the permeable road construction, known as »the Unit Super Structure», have been carried out at the Department of Water-Resources Engineering, Lund Institute of Science and Technology/University of Lund, Sweden. The project consisted of three parts: – Hydrological studies – Technical and mechanical studies of materials – Production technical and economical studies The project […]
Publiceringsdatum
Författare
JONAS HALL, WILLIAM HOGLAND, LENNART JÖNSSON and THOMAS WAHLMAN
Nummer
2
Årgång
44
Utgåva
The analysis of AOX, adsorbable organic halogen, has been evaluated with an instrument which has not been in use in Sweden previously. The analysis was performed according to a German standard and analytical blank, and detection limit and reproducibility were studied. Typical AOX concentrations occurring in various wastewater and water samples are given.
Publiceringsdatum
Författare
LENNART KAJ and PETER SOLYOM
Nyckelord (Keyword)
AOX, detection limit, reproducibility
Nummer
2
Årgång
44
Utgåva
The functional response of natural communities to different types of disturbance was measured in an in situ continuous flow apparatus. From continuous registrations of oxygen, light, temperature and water flow functional parameters like respiration and production were calculated. Some examples of functional responses of filter feeder and Fucus vesiculosus communities to cadmium and antifouling paint […]
Publiceringsdatum
Författare
CECILIA LINDBLAD
Nyckelord (Keyword)
Baltic, algae, stress, metabolism
Nummer
2
Årgång
44
Utgåva
In this article we would like to emphasize the importance of water erosion as a process related to sediment and nutrient losses. Many changes of the cultural landscape, which have taken place during the 20th century, have not only led to an increase in productivity but have also contributed to an increase in the risk […]
Publiceringsdatum
Författare
KERSTIN ALSTRÖM and ANN BERGMAN
Nyckelord (Keyword)
water erosion, arable land, non-point pollution, soil erosion risk mapping.
Nummer
3
Årgång
44
Utgåva
Frequently employed methods for the determination of organic halogens as group parameters in water samples are reviewed. The methods are evaluated with respect to their applicability in waste water characterization and marine monitoring. Results from the analyses of organic halogens in samples of marine waters, sediments and biological species are summarized. It is concluded that […]
Publiceringsdatum
Författare
CHRISTIAN GRØN
Nyckelord (Keyword)
Statistical analyses
Nummer
3
Årgång
44
Utgåva
The contribution of inorganic chloride to the extractable, organically bound chlorine (EOCl) in fish was investigated by adding radioactively labelled chloride to an aquarium with perch (Perca fluviatilis). The total radioactivity in fish tissue was compared to the radioactivity in the corresponding EOCl extracts. The concentration of inorganic chloride was reduced about 120,000 times during […]
Publiceringsdatum
Författare
CLAS WESEN
Nyckelord (Keyword)
extractable organically bound chlorine, EOCl, 36Cl, chloride, fish
Nummer
3
Årgång
44
Utgåva
For the determination of total organic substances in water three, principally different methods are available. These are chemical oxygen demand (COD), total organic carbon (TOC) and biochemical oxygen demand (BOD). Theoretical and empirical relationships between results obtained with these methods are discussed based on literature and own results. Variations in the relationships are mainly due […]
Publiceringsdatum
Författare
ANDERS WILANDER
Nyckelord (Keyword)
BOD, COD, TOC
Nummer
3
Årgång
44
Utgåva
In Denmark, as in other countries, the need for supervision and control with the water pollution is increasing. Microbiological and chemical water analyses are an important tool for this control. However, the condition for using the results of these analyses is a good and reliable quality of the analyses. In Denmark an important part of […]
Publiceringsdatum
Författare
ANNA-BODIL CHRISTOFFERSEN, JES LA COUR JANSEN
Nyckelord (Keyword)
statistical analyses, intercalibration, microbiological analyses.
Nummer
3
Årgång
44
Utgåva
Tunisia has during the last ten years invested in an ambitious programme for waste water treatment throughout the country. The startpoint of this programme has to some extent been the situation in the tourist centres along the Mediterranean coastline during the late sixties. The overall water conservation aspect has had a very important impact on […]
Publiceringsdatum
Författare
DANIEL HELYEAR, and STIG MORLING
Nummer
1
Årgång
43
Utgåva
Drying of suspended solids and total solids samples using a household microwave oven is satisfactory for experimental work as well as a standby method for normal operational sample analysis. Results agree with analysis made using a conventional oven for influent and effluent waters, mixed liquor suspended solids, recycle solids and primary, thickened and dewatered sludges. […]
Publiceringsdatum
Författare
DOUG J. LUMLEY, and ANNIKA KUHLIN
Nyckelord (Keyword)
suspended solids, drying in microwave oven
Nummer
1
Årgång
43
Utgåva
The Gothenburg Water and Sewage Works celebrates this year its 200th anniversary. Today Gothenburg Water and Sewage Works is one of the biggest supermarkets in the country. – delivers 200,000 m3 drinking water daily – is open around the clock – delivers the water at the customers premises through a reliable distribution system and takes […]
Publiceringsdatum
Författare
JAN ADAMSSON
Nummer
2
Årgång
43
Utgåva
Vänern har sitt enda utlopp till havet genom Göta älv. Älven är med ett medelvattenflöde av ca 550 m3/s Sveriges vattenrikaste vattendrag. Till långt mer än 90 % av tiden är älven en utmärkt råvattentäkt. Man kan producera ett dricksvatten av god kvalitet. Genom de kontinuerliga mätningarna spåras alla större utsläpp i Göta älv. Genom […]
Publiceringsdatum
Nummer
2
Årgång
43
Utgåva
The City of Gothenburg got its first water supply system two hundred years ago, in 1787, when water from the spring at Kallebäck was conveyed to the town centre. Later on installations at the Delsjö Lakes and at Alelyckan were built, in 1870 and 1894 respectively. At the present time the City’s supply of drinking […]
Publiceringsdatum
Författare
ANDERS PETTERSSON
Nummer
2
Årgång
43
Utgåva
Extensive automation and computerization of the production and distribution of the City’s supply of drinking water have been carried out in recent years. The central computer is an ASEA MasterPiece 240 with a Tesselator 8000, printers for printing occurrences and reports and hardcopies of the display printouts. The subsidiary control points consist of programmable control […]
Publiceringsdatum
Författare
ANDERS PETTERSSON
Nummer
2
Årgång
43
Utgåva
Göteborg har alltsedan 1894 Göta älv som råvattentäkt. Detta har ständigt medfört kvalitetsproblem. Vattenreningen har fått anpassas efter förutsättningarna – utvecklingsarbetet måste vara målinriktat och resultera i en snabb förbättring av vattenkvalitén. Vattnet renas genom klorering, flockning, avsättning, filtrering genom aktiverat kol (activated carbon) samt desinfektion med klor och klordioxid. Vattnet efteralkaliniseras och natriumsilikatlösning tillsättes. […]
Publiceringsdatum
Författare
TIBOR NEMETH
Nummer
2
Årgång
43
Utgåva
The water network in Gothenburg has a length of 1,530 km and consists mainly of cast iron pipes. The pipes are up to 100 years old and the biggest diameters are 1,200 mm. To establish the need for reinvestments during the next 10 to 15 years, a master plan has been worked out, setting out […]
Publiceringsdatum
Författare
OLLE LJUNGGREN
Nummer
2
Årgång
43
Utgåva
Any change in water flow rate in pipes, regardless of the rate or magnitude of change, requires that the water be accelerated or decelerated from its initial flow velocity. A force is required to change the velocity of he flow and this force occurs as a hydraulic pressure transient in the pipe. The most common […]
Publiceringsdatum
Författare
BERNT PERSSON
Nummer
2
Årgång
43
Utgåva
The network for distribution of water in Gothenburg amounts to 1,500 km pipes. About 60 % of the length has an average age of 50 years and is made of cast iron, 20 % is ductile iron and has an average age of 10 years. The waterlosses in 1985 were 26 % of the produced […]
Publiceringsdatum
Författare
SVEN-ERIK KRISTENSON
Nummer
2
Årgång
43
Utgåva
A master plan for sewerage in Gothenburg has been developed. The Water and Sewage Works serves 30,000 inhabitants in a 140 km2 area. The sewers have a total length of 2,233 km. The first Gothenburg master plan for sewerage was adopted in 1866. Combined sewers were laid until 1957. Therafter separate storm sewers have been […]
Publiceringsdatum
Författare
BERNT PERSSON
Nummer
2
Årgång
43
Utgåva
The first water pipe from Kallebäck completed in 1787 consisted of bored up timber of aspen and pine. It had served for 104 years when it in 1891 was replaced by a new cast iron pipe. Cast iron have since then been the dominating material of the pipes. Nowadays pipes with inside corrosion isolation of […]
Publiceringsdatum
Författare
BÖRJE JELTIN
Nummer
2
Årgång
43
Utgåva
As a result of new recommendations and guidelines prepared by the Swedish Environmental Protection board (SNV), the emphases of current and future monitoring programs have changed. However, little attention has been focused on nonpoint sources of water pollution in considering alternative designs. This is important because monitoring programs to detect the respective impacts from point […]
Publiceringsdatum
Författare
LORIN E. REINELT, REINHOLD CASTENSSON, and RICHARD R. HORNER
Nyckelord (Keyword)
monitoring design, universal soil loss equation, station location, sample frequency, river basin analysis, choice of parameters
Nummer
3
Årgång
43
Utgåva
A sufficient coagulant dose is essential in order to obtain chemically treated humic surface water of satisfactory quality. But it is bad economy to apply too high a dosage just to be on the safe side. Studies at water treatment plants with large variations in the raw water humic content have shown that efficient supervision […]
Publiceringsdatum
Författare
CLAES HERNEBRING
Nyckelord (Keyword)
coagulation, aquatic humus
Nummer
3
Årgång
43
Utgåva
The relationship between total aluminium concentration and acidity was studied in water from 14 forest brooks. From the individual brook between 10 and 26 water samples were taken distributed over different parts of one to four consecutive years. All samples were taken during the period 1982-1986. For the whole material pH varied between 4.1 and […]
Publiceringsdatum
Författare
HANS-ÖRJAN NOHRSTEDT
Nyckelord (Keyword)
aluminium, pH, sulphate, water runoff
Nummer
3
Årgång
43
Utgåva
The mobile septage dewatering trucks are a new alternative to the more common practice for septage handling. The greatest advantage of the system is that the septage is treated at the point of production to the degree that it can be delivered directly to local farmers. Two systems are evaluated; Hamstern by the Mattsson Group […]
Publiceringsdatum
Författare
BJARNE PAULSRUD and ARILD S. EIKUM
Nyckelord (Keyword)
dewatering, cost, Hamstern, MOOS KSA
Nummer
3
Årgång
43
Utgåva
Raw water, treated water and distributed water from three water works in the vicinity of Oslo, Norway, were investigated for content of heterotrophic, aerobic microorganisms and total count of bacteria. The treatment was different in the three water works, but they all got raw water from the hypolimnion of stratified lakes. The total counts were […]
Publiceringsdatum
Författare
KARI S. ORMEROD
Nummer
4
Årgång
43
Utgåva
The past decade’s chemical, toxicological and epidemiological research on by-products of drinking water chlorination has been reviewed. A large number of by-products has been identified and tested in different bioassays, and, recently, considerable progress has been made in the identification of Ames mutagenic byproducts. Still, there is little hope that the present uncertainty of chemical-toxicological […]
Publiceringsdatum
Författare
ANDERS GRIMVALL
Nyckelord (Keyword)
disinfection by-products, carcinogens, mutagens, risk analysis
Nummer
4
Årgång
43
Utgåva
Today there is a serious concern about the consequences of a global climate change. One possible effect of this change is a considerable rise of the sea level. According to several prognoses it may be expected that the sea level rise by the year 2100 may lie between 0.9 and 1.7 m with a preferred […]
Publiceringsdatum
Författare
GUNNAR LINDH and HANS HANSON
Nummer
4
Årgång
43
Utgåva
Earlier investigations have shown that the run-off from a forested area increases after clear-cutting. For Swedish conditions, values between 90 and 406 mm/year have been reported. On the bases of micrometeorological measurements above clearcut and forest areas and of theoretical discussions, light can be shed on the causes to the run-off increase. The present micro-meteorological […]
Publiceringsdatum
Författare
ANDERS LINDROTH, and HARALD GRIP
Nyckelord (Keyword)
micro-meteorology, surface resistance, radiation, temperature, energy storage, water balance
Nummer
4
Årgång
43
Utgåva
Environmental problems and technical systems in the society are fundamentally related to hydrology. Hydrology is a very comprehensive concept. In fact, there are at least ten independent disciplines within hydrology. Classical hydrology is a descriptive science with the water balance equation as almost the only means of quantifying computations. Hydrodynamics have now to some extent […]
Publiceringsdatum
Författare
LARS BENGTSSON
Nyckelord (Keyword)
hydrodynamics, pathways, environmental problems, research application
Nummer
4
Årgång
42
Utgåva
The information gap between research and praxis is analysed with a background of the ongoing segmentation and specialization of human knowledge. The genesis of the information gap is analysed and applied on the Swedish water administration and Swedish water research. A way for reduction of the information gap is indicated in increased co-operation and interaction […]
Publiceringsdatum
Författare
REINHOLD CASTENSSON
Nyckelord (Keyword)
decision-making, segmentation of knowledge, water management, water resource
Nummer
4
Årgång
42
Utgåva
To be prepared to handle the water problems for the future we must collect and store waterdata of different kind today. It is a difficult task to judge the necessary extent of that storage both regarding different variables and the frequency of the data collection
Publiceringsdatum
Författare
ULF EHLIN
Nyckelord (Keyword)
water data, water information system
Nummer
4
Årgång
42
Utgåva
P removal from wastewater was examined by electrolysis in a recirculating closed water system employing alternating current with 0.0039 Hz frequency and Al electrodes. Adjusting pH to about 6 with HCl facilitated complete removal of P and residual Al
Publiceringsdatum
Författare
OLAV GRØTERUD and LECH SMOCZYNSKI
Nyckelord (Keyword)
phosphorus removal, residual Al, recirculation, pH regulation
Nummer
4
Årgång
42
Utgåva
The aim of the study has been to test the applicability of the so called Rain Envelope Method and the Max Day Method, respectively, for design of percolation basins. For a given depth the basin volume has to be designed to meet a certain required frequency of flooding. Flooding is defined as one or more […]
Publiceringsdatum
Författare
ANDERS SJÖBERG and HENRIETTE MELIN
Nyckelord (Keyword)
percolation basin, design, storm water infiltration, storm water storage
Nummer
4
Årgång
42
Utgåva
Lake Ringsjön in Scania, southern Sweden, has been very eutrophicated during a comparatively short time. In spite of advanced municipal waste water treatment for phosphorus removal, no improvements have been observed in lake water quality. The reasons are release of P from the sediments and an extremely large external loading on two of the basins […]
Publiceringsdatum
Författare
CURT FORSBERG and MAUD WALLSTEN
Nyckelord (Keyword)
watershed, agriculture area, point and non-point sources of phosphorus, input, main pools and output
Nummer
4
Årgång
42
Utgåva
A comparison was made between the Nordic standard and the small-scale closed tube method for the determination of CODcr. The closed tube method studied follows the standard procedure except that the sample and reagent volumes are one fifth of those in the standard. The results from the two methods are in good agreement and the […]
Publiceringsdatum
Författare
KIRSTI HAAPALA and BRITA STARCK
Nyckelord (Keyword)
water analysis, effluents, chemical oxygen demand, closed tube methods, standards.
Nummer
4
Årgång
42
Utgåva
The Helsinki Convention – The Convention on the Protection of the Marine Environment of the Baltic Sea Area comprises the Baltic Sea proper with the Gulf of Bothnia, the Gulf of Finland and the entrance to the Baltic Sea. The Convention is ratified by all Baltic Sea states i.e. Denmark, the Federal Republic of Germany, […]
Publiceringsdatum
Författare
LARS G. THORELL
Nyckelord (Keyword)
Helsinki convention, DDT, PCB, PCT, mercury, cadmium, oil, nutrients
Nummer
4
Årgång
42
Utgåva
International Maritime Organization, IMO, has in Marpol Annex IV tried to achieve an international regulation of marine sewage pollution. Marpol is not yet in force, but some areas are regulated by states and conventions, e.g. the Baltic convention whose rules in principle are the same as Marpol Annex IV. It is already in force for […]
Publiceringsdatum
Författare
HANS ZETTERLING
Nummer
4
Årgång
42
Utgåva
Small drainage areas with a growing but still sparse population often constitute a problem in environment protection work because quantitative data to support decision-making and more long term sewage-handling strategies are lacking. In this study transports strictly measured from water-quality data were compared to transports calculated from landlosses and estimated discharges from an inventory of […]
Publiceringsdatum
Författare
PER OLSÉN and BO SVÄRD
Nyckelord (Keyword)
transports, decision-making, measured transports, phosphorus load, planning, calculated
Nummer
1
Årgång
43
Utgåva
Eutrophication of watersheds today is mainly caused by antrophogenic influence. Calculations have been done using theoretical framework including fertilizers, leaking from farms etc., as well as practical measurements in the field. The results indicate that the additions of phosphorus from the sewage treatment plants in the watershed are today in order of 15 % and […]
Publiceringsdatum
Författare
ÅKE FLEETWOOD
Nyckelord (Keyword)
running water, phosphorus content, nitrogen content, nutrient salt reduction
Nummer
1
Årgång
43
Utgåva
Algal blooms and oxygen deficiency in the hypolimnion have become common in coastal waters of the eastern Kattegat (southern Sweden). Increased nitrogen and phosphorus loads from inland waters are supposedly responsible for these phenomena. During the past few years the lowest summer oxygen concentrations of the Kattegat were found in Skälderviken bay. The Rönneå is […]
Publiceringsdatum
Författare
SEBASTIAN DIEHL, PER-MARTIN TÄPP, MAGNUS ENELL, and LARS LEONARDSON
Nyckelord (Keyword)
marine eutrophication, agriculture, nitrogen, phosphorus, areal coefficients.
Nummer
1
Årgång
43
Utgåva
The design, function, hydraulic properties, input and output of eight sand filter systems and eight infiltration systems were investigated. The designed hydraulic loads were in some cases high and ranged from 28-100 L m-2d-l for the infiltration sites and from 30-130 L m-2d-1 for the sand filters. Older sites had clay pipes with open connections […]
Publiceringsdatum
Författare
PETER NILSSON, and ARNE O. STUANES
Nyckelord (Keyword)
sand filter systems, infiltration systems, wastewater
Nummer
1
Årgång
43
Utgåva
Eight sand filter systems and eight infiltration systems were investigated for soil pH, total carbon and nitrogen. All of the systems have been in use for several years. The soil from the systems was analyzed by standard methods. The soil pH of the sand filter systems clearly reflected the pH of the wastewater. As expected, […]
Publiceringsdatum
Författare
ARNE O. STUANES, and PETER NILSSON
Nyckelord (Keyword)
sand filter systems, infiltration systems, total N, organic N, ammonium, nitrate.
Nummer
1
Årgång
43
Utgåva
Eight sand filter systems and eight infiltration systems were investigated for the fate of phosphorus (P). All of the systems have been in use for several years. The soil from the systems was extracted by different methods by use of extractants, e.g. HC1, a mixture of acetic acid and ammoniumlactate (AL-solution) and water. The sorbed […]
Publiceringsdatum
Författare
ARNE O. STUANES, and PETER NILSSON
Nyckelord (Keyword)
sand filter systems, infiltration systems, extractable P, Fe and Al, desorption, sorption.
Nummer
1
Årgång
43
Utgåva
Liming of Fosstølbekken, a brook in Aust-Agder county, southern Norway, was stopped during two flow episodes in order to study long-term dissolution of sedimented limestone powder. The pH increasing capacity was adequate over a certain period of time. This capacity was considerably reduced during the second flow episode, where pH only increased from 4.8 to […]
Publiceringsdatum
Författare
ATLE HINDAR
Nyckelord (Keyword)
long-term dissolution of limestone powder, liming strategy, interpretation of efficiency data.
Nummer
1
Årgång
43
Utgåva
Liming of discharge areas of groundwater aquifers is one method to increase the alkalinity in surface waters. A mathematical model for the chemical effects of liming upon the soil, the soil solution and the run-off was formulated. The model includes simultaneous dissolution of limestone, cation-exchange and leaching of dissolved components. The model has been tested […]
Publiceringsdatum
Författare
PER WARFVINGE and HARALD SVERDRUP
Nyckelord (Keyword)
streams, acidification, mitigation, liming, watershed
Nummer
1
Årgång
43
Utgåva
The Vivassen is a small embayment (1 km2) on the Swedish east coast with a narrow sound connecting it to the Baltic archipelago. We have measured the supply of nitrogen and phosphorus from waste disposal and from runoff and compared those sources with the supply of nutrients from the Baltic dividing between spring bloom nutrient […]
Publiceringsdatum
Författare
LARS RYDBERG och GÖRAN BJÖRK
Nummer
1
Årgång
43
Utgåva
The loading of organic matter to Vänern peaked during the mid-1960’s. Restructing and improvements of treatment procedures within the paper and pulp industries have resulted in a decrease which later resulted in a reduction of the permanganate numbers and an increase of Secchi depth. In order to evaluate later developments, the changes of KMn04-numbers have […]
Publiceringsdatum
Författare
HANS KVARNÄS
Nummer
1
Årgång
43
Utgåva
The district of Kristianstad has about 70,000 inhabitants. Approximately 20,000 are served with water from 8,000 wells used by one household each. They include 4,000 dug wells, 3,500 drilled wells and 500 driven yells. About 2,000 of the wells cannot meet the bacteria density standard and 3,000 wells have a nitrate concentration >10 mg/1 NO3-N […]
Publiceringsdatum
Författare
LARS-ERIK WIDARSSON, GUSTAVO SALTIEL, and MICHAEL DAHLMAN
Nyckelord (Keyword)
groundwater, nitrate, bacteria, seasonal variation
Nummer
1
Årgång
43
Utgåva
Bromma Wastewater Treatment Plant, which serves the western part of Stockholm, comprises two units: the Åkeshov plant and the Nockeby plant. Today, mechanical and chemical treatment takes place at Åkeshov, accompanied by sludge treatment, while the biological treatment is carried out at the Nockeby plant. At the beginning of the 1980’s considerable conversion and extension […]
Publiceringsdatum
Nummer
2
Årgång
42
Utgåva
After the Bromma sewage treatment plant was enlarged and reconstructed, the operation of the plant has been improved. Temporary requirements concerning the effluent are applied today until the final decision of the environmental authorities. The requirements are presented below together with the appropriate result from 1985. It is rather difficult to reach a complete nitrification […]
Publiceringsdatum
Författare
JAN HULTGREN
Nyckelord (Keyword)
nitrification, BOD-removal, phosphorus removal, sludge age
Nummer
2
Årgång
42
Utgåva
Henriksdal Sewage Treatment Plant is designed to serve approximately 725,000 p.e., and is thus Sweden’s largest. In order to be able to meet the increasingly stringent demands for treatment and control of the different processes, preliminary studies have been conducted in joint consultation between invited suppliers the staff of the plant. The objective of the […]
Publiceringsdatum
Författare
ULFJORDVALL, and BENGT MALMQVIST
Nummer
2
Årgång
42
Utgåva
Bromma sewage treatment plant for 260,000 persons has its outlet in Lake Mälaren, which also serves the greater Stockholm region as a source of drinking water. The erection of a heat pump 4 km from the plant has opened the possibility to choose another more suitable receiving water in the sea outside Stockholm. The heat […]
Publiceringsdatum
Författare
NILS FRIEDERICH
Nyckelord (Keyword)
water protection, tunnel boring machine
Nummer
2
Årgång
42
Utgåva
The Stockholm archipelago has been used as a receiver for waste water for several decades. During 1968-73 the waste water treatment was improved, after which the phosphorus load significantly decreased. Since 1970 concentrations of nitrogen, phosphorus and other hydrographical parameters were measured along the eutrophication gradient from Stockholm. Quantification of cyanobacteria and chlorophyll a were […]
Publiceringsdatum
Författare
GUNILLA BRATTBERG
Nyckelord (Keyword)
Stockholm archipelago, brackish water, reduced eutrophication, decreased phosphorus loading, N/P ratio, limiting nutrients, cyanobacteria, chlorophyll a, nitrogen fixation.
Nummer
2
Årgång
42
Utgåva
The working group for lake restoration was established in Stockholm in 1972. It started by examining the preconditions for restoration measures in 16 lakes and catchment areas, and went on to select seven priority lakes where measures should be taken. Since then, restoration work has proceeded, sometimes in co-operation with neighbouring municipalities. Among the various […]
Publiceringsdatum
Författare
BENGT EKLUND
Nyckelord (Keyword)
lake restoration, dredging
Nummer
2
Årgång
42
Utgåva
Lake Trekanten has during the 20th century developed into a heavily eutrophicated state. The lake has served as a recipient for combined sewer overflow water. This outlet ceased in 1961. In order to prevent the internal fertilizing process which leads to enhanced primary production the sediment was treated in accordance with the ”Riplox Method”, i.e. […]
Publiceringsdatum
Författare
GUNILLA LINDGREN
Nyckelord (Keyword)
lake restoration, "Riplox Method", tap water addition, bottom water discharge
Nummer
2
Årgång
42
Utgåva
The result of a part of the studies of the transport of nitrogen and phosphorus to the Svartå river within the Motala Ström river basin is given. The amount of nutrients transported to the river with the storm water from the city of Mjölby has been estimated. By maps and field investigations the size of […]
Publiceringsdatum
Författare
VIKTOR ARNELL
Nyckelord (Keyword)
storm-water, sewage-water, storm-water pollution, phosphorus, nitrogen
Nummer
3
Årgång
42
Utgåva
A mixed wastewater from different food-processing industries has been treated in two pilot-scale aerated submerged biological filters. Plastic media with specific surface areas of 140 m2/m3 and 230 m2/m3, respectively, were used. A maximum volumetric removal rate in excess of 15 kg COD/m3d was obtained with the 230 m2/m3filter medium. In order to perform properly […]
Publiceringsdatum
Författare
BJØRN RUSTEN, and HALLVARD ØDEGAARD
Nyckelord (Keyword)
food industry effluents, high-rate treatment, submerged biofilters, aerobic conditions, biofilm
Nummer
3
Årgång
42
Utgåva
The occurrence of copper, zinc, lead, cadmium and chromium in water distributed by Finnish waterworks was investigated in 1983. The volume of water from the 55 waterworks investigated covers 67 % of the total volume of public water supplied in Finland. The total number of water samples was 863. The possible connection between the occurrence […]
Publiceringsdatum
Författare
LEENA HIISVIRTA, JARI LEHTO, JORMA KUMPULAINEN, PEKKA KOIVISTOINEN, and LAHJA PITKÄNEN
Nyckelord (Keyword)
drinking water, heavy metals, corrosion, alkalization
Nummer
3
Årgång
42
Utgåva
The concentrations of oxygen, nitrate, phosphate, particulate organic matter and planktonic algae around a cage fish farm during an annual cycle showed values similar to the concentrations in the water of the surrounding sea area. There was no increase of nutrients and no denser growth of algae in the cage fish farm. The concentration of […]
Publiceringsdatum
Författare
AGNES MÜLLER-HAECKEL
Nyckelord (Keyword)
cage fish farm, water quality, annual cycle, oxygen saturation, nitrate, phosphate, particulate organic matter, planktonic algae
Nummer
3
Årgång
42
Utgåva
Based on experimental studies in a pH-stat the dissolution kinetics for K-slag, a tricalcium silicate, was determined. The expression is: [CHEMICAL FORMULA NOT INCLUDED] where the rate constants at 20°C are given by: pKi =5.36±0.18, pKW=8.15±0.08 and pKB= 7.3 ±0.06. The dissolution of K-slag is slower than calcite dissolution but faster than dolomite dissolution at […]
Publiceringsdatum
Författare
HARALD SVEDRUP, PER WARFVINGE and INGEMAR BJERLE
Nyckelord (Keyword)
silicate slag, dissolution kinetics, liming, K-slag, tricalcium silicate
Nummer
3
Årgång
42
Utgåva
A conceptual model for simultaneous computation of runoff and inorganic nitrogen leaching has been developed and tested. The model is semiempirical with coefficients that are calibrated against observed data. The model has been verified against data from two small fields of arable land in southern Sweden. The results indicate that a major part of variations […]
Publiceringsdatum
Författare
MAJA BRANDT and STEN BERGSTRÖM, and ARNE GUSTAFSON
Nyckelord (Keyword)
nitrogen losses, water quality modelling
Nummer
3
Årgång
42
Utgåva
Muscle mercury accumulation in Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta) have been studied in two small acidified coastal watersheds in S.W. Norway. Individual mercury concentration varied between 0.05 and 0.31 ppm (ìg/g) Hg, and increased significantly with age in all fish stocks, except one. Brown trout from Lake Djupvikvatn had the highest […]
Publiceringsdatum
Författare
RAGNVALD ANDERSEN, JOSTEIN SKURDAL, and ARNE LINLØKKEN
Nyckelord (Keyword)
axial muscle mercury accumulation, Arctic char, brown trout, acidification
Nummer
3
Årgång
42
Utgåva
Possible reasons for the development of greater numbers of bacteria in paper-mill processes from the time around 1965 and onwards are discussed. The proportion of enterobacteria was relatively constant, a few per cent of the colony forming units (CFU) with Klebsiella, Enterobacter, and Erwinia dominating among members of Enterobacteriaceae. The concern for the possible effects […]
Publiceringsdatum
Författare
LENNART SPARELL, LENNART KARLSSON, and GUNILLA LINFORS,
Nyckelord (Keyword)
Klebsiella pneumoniae, Erwinia, Enterobacteriaceae, paper mill, recipient, ecosystem.
Nummer
3
Årgång
42
Utgåva
Vid Mjölkulla reningsverk i Mjölby startades under perioden april-augusti 1985 ett försök med Alfax’ AIROXAL-process. Initiativtagare från Mjölby kommun var driftingenjör Börje Karlsson. Ett samarbete för försöket kom till stånd mellan Mjölby kommun, VIAK AB och Alfax AB. Försöket blev lyckat och som första kommun i Sverige kommer en permanent utrustning att installeras vid reningsverket […]
Publiceringsdatum
Författare
BÖRJE KARLSSON, ROLF BERGSTRÖM, and GÖRAN BOHMAN
Nummer
3
Årgång
42
Utgåva
Försök har utförts att avvattna och fosforfälla brunnsslam från Stockholms skärgård med hjälp av dels en Moos avvattningscontainer, dels en Reductor siltrumpress. För avvattningen har olika polyelektrolyter provats, och för fosforfällningen har järnklorid, aluminiumsulfat och Ekoflock använts. Undersökningen visar att fosforhalten kan sänkas från 50 mg/l till 1 a 2 mg/1, COD från 3 000 […]
Publiceringsdatum
Författare
ANNA-GRETA BERG, and LARS HALL
Nummer
3
Årgång
42
Utgåva
This paper aims at showing how a modern view of hydrology has developed in Sweden during the last thirty years. This is done by selecting some areas where Swedish research programmes have contributed to the development of the hydrological sciences, e.g. studies performed in so called representative basins, urban hydrological studies as well as research […]
Publiceringsdatum
Författare
GUNNAR LINDH
Nyckelord (Keyword)
urban hydrology, lake hydrology, conceptual hydrological models
Nummer
4
Årgång
42
Utgåva
Due to more complicated pollution situations future water management needs more reliable data on transport of pollutants from a variety of sources – both from external sources (air, land, waste water etc.) and from internal sources (e g regeneration from sediments). A common base for estimates of pollution inputs from these sources is different types […]
Publiceringsdatum
Författare
SVEN-OLOF RYDING
Nyckelord (Keyword)
pollution transports, environmental impact assessments, decision-making, water planning, data handling
Nummer
4
Årgång
42
Utgåva
Hydrological knowledge is scattered in many central, regional and local authorities and with consultants and researchers. In spite of a tendency towards an integrated view on hydrological issues the different expertise units will probably remain in power also in the year 2000. The separate hydrological topics probably benefit from this situation. Data on surface water, […]
Publiceringsdatum
Författare
LARS NORDBERG
Nyckelord (Keyword)
hydrologic knowledge accessibility and information, water planning, data banks, water authorities
Nummer
4
Årgång
42
Utgåva
Macro-scale water supply/demand profiles are presented for thirteen subunits of Motala river basin in south-central Sweden. The renewable water supply of each subunit is composed of exogenous inflow from the neighbouring upstream subunit, and endogenous flow production in the unit itself. The latter contains hydrochemically different water fractions, mixing in the river and emanating from […]
Publiceringsdatum
Författare
MALIN FALKENMARK
Nummer
4
Årgång
41
Utgåva
The unit superstructure is a new method of constructing superstructure in traffic areas. The system consists of macadam and a porous asphalt. The structure distributes rain and surface water by means of infiltration to the underlying soil. When used in humid areas this method may drastically reduce the need for costly drainage and storm water […]
Publiceringsdatum
Författare
JANUSZ NIEMCZYNOWICZ, WILLIAM HOGLAND och THOMAS WAHLMAN
Nummer
4
Årgång
41
Utgåva
The nitrification in the BOD-test at different contents of nitrification inhibiting agents has been investigated through analyzing the contents of ammonia-nitrogen, Kjeldahl-nitrogen, nitrite+nitrate-nitrogen and alkalinity before and after incubation. The tests have been made on treated sewage from Henriksdal sewage treatment plant, a plant with partial nitrification in the activated sludge process. BOD-tests have been […]
Publiceringsdatum
Författare
JAN HJORT, HELGE BERGSTRÖM, GUNNAR EKEDAHL, and ÖSTEN LINDGREN
Nummer
4
Årgång
41
Utgåva
The development of Gallionella ferruginea biofilms and the associated iron precipitation in flowing ground water from two 46 m deep wells were studied over 48 h. The bacterium formed biofilms of up to 1.76 /ìg total organic carbon per cm2 with 18.8 /ìg precipitated iron per cm2. Microscopic observations revealed multilayered net-works of the bacterium […]
Publiceringsdatum
Författare
KARSTEN PEDERSEN and EVA-LENA HALLBECK
Nummer
4
Årgång
41
Utgåva
Most problems associated with pH measurement with electrodes are related to the failure of the reference half-cell to maintain constant potential. The problem is most obvious when making pH measurements on two sample solutions with a great difference in ionic strength. An example would be when a pH meter is standardized with a buffer of […]
Publiceringsdatum
Författare
KENT E. ERSSON
Nummer
4
Årgång
41
Utgåva
Especially in developing countries, the rapid growth of densely populated areas makes great demands upon planners and decision-makers. There is, among other things, a strong need of rational management of water resources within the framework of integrated societal planning. The complexity exhibited by large urban areas calls for a new approach in planning and management, […]
Publiceringsdatum
Författare
GUNNAR LINDH
Nyckelord (Keyword)
water resources, urban area, ecosystem, planning and management
Nummer
1
Årgång
42
Utgåva
A simple nomograph for determining the time required to reacidify a limed lake to pH 6 has been made with the reacidification model developed at the Department of Chemical Engineering, The Lund Institute of Technology. It predicts the reacidification as a function of the hydraulic residence time, the amount calcite on the bottom and the […]
Publiceringsdatum
Nummer
1
Årgång
42
Utgåva
The National Swedish Environmental Protection Board recommends a standard value method for calculation of mass transport of pollutants via storm water sewer systems. In this paper mass transport calculations based on this method are compared with actual measurements. Measurements during one and a half years in the city of Lund show high amounts of leakage […]
Publiceringsdatum
Författare
WILLIAM HOGLAND, RONNY BERNDTSSON and MAGNUS LARSON
Nyckelord (Keyword)
stormwater, pollutants, masstransport, modelling.
Nummer
1
Årgång
42
Utgåva
Bacteria attach and grow on surfaces in all biologically active systems. Municipal drinking water represents such a system. It can be questioned if desinfectants are active against bacteria growing on surfaces in the same order as against free-living bacteria. What will happen if patogenic bacteria for some reason occupy a niche amongst the surface living […]
Publiceringsdatum
Författare
KARSTEN PEDERSEN, LARS BRÄNDSTRÖM and ANNA-KERSTIN OLSSON
Nyckelord (Keyword)
Acinetobacter calcoaceticus - Caulobacter sp. - Pseudomonas alcaligenes - drinking water -PVC - polyethylene - copper - glass - attachment.
Nummer
1
Årgång
42
Utgåva
Nitrogen transport in three South Swedish rivers was compared with the amount of nitrogen drained to the rivers from the surrounding arable land, using mass balance calculation. It was found that as much as 25-30 % of the nitrogen is denitrified during the transport in the rivers. Denitrification may be an important process for decreasing […]
Publiceringsdatum
Författare
MATS JANSSON, LARS LEONARDSON, och ULF RÖNNER,
Nyckelord (Keyword)
denitrification, running water, eutrophication, coastal water.
Nummer
1
Årgång
42
Utgåva
P removal from wastewaters by electrolysis was examined by an experimental laboratory system. Al electrodes were applied in accordance with previous experiments to find the best conditions (pH, water flow, energy consumption) for P removal. Alternating current with a frequency of 0.0039 Hz made ”self-cleansing” of the electrodes possible and provided a favourable energy consumption […]
Publiceringsdatum
Författare
O. GRØTERUD and L. SMOCZYNSKI
Nyckelord (Keyword)
premoval, Al electrodes, alternating current, high pH, water flow, energy consumption
Nummer
1
Årgång
42
Utgåva
Phosphorus and nitrogen mass balances for the Baltic Sea are presented (mainly based on data from Larsson et al. 1985) for three situations: 1) present situation, 2) after 80 % P and N removal from point sources, 3) in natural conditions. The balances indicate that a phosphorus removal from point sources will lead to a […]
Publiceringsdatum
Författare
JENS MØLLER ANDERSEN
Nyckelord (Keyword)
Baltic Sea, eutrophication, nutrients, massbalances.
Nummer
1
Årgång
42
Utgåva
Lagan är södra Sveriges mäktigaste vattendrag. IVL har på uppdrag av Lagans Vattenvårdsförening sammanställt en skrift till föreningens 30-årsjubileum. Skriften beskriver utveckling, utnyttjande och vård av ett vattendrag genom en tidsperiod som präglats av industrialisering, stora vattenvårdande insatser och ett ökande ansvar för bevarande av våra vattenresurser. Framtida beslut om vattenvårdande åtgärder blir svårare i […]
Publiceringsdatum
Nyckelord (Keyword)
Lagan River basin, water protection 1955-1985, hydrology, water quality, land- and water planning
Nummer
1
Årgång
42
Utgåva
The possibility to reduce power consumption in aerated lagoons by means of a combination of mixers and aerators is discussed. Two theoretical examples based on recent studies in the US and experiences from aerated lagoons in Sweden and Tunisia are calculated to show the potential energy saving by using mixers and aerators in combination. The […]
Publiceringsdatum
Författare
STIG MORLING
Nyckelord (Keyword)
aeration-basins, aeration-mixing, energy cost, oxygen input
Nummer
1
Årgång
42
Utgåva
It is the task of Stockholm Water and Wastewater Works to operate water supply and sewage treatment plants and to be responsible for the pipeline systems for water and wastewater in Stockholm. The city’s first waterworks was commissioned in 1861, and it is only natural to assume that many aspects of the technical systems have […]
Publiceringsdatum
Författare
ROLF NORBERG
Nummer
2
Årgång
42
Utgåva
The location of the settlement that became the nucleus of today’s Stockholm was a success from the point of view of water supply. A huge boulder-ridge, which provided wells with abundant supplies of water, passed through Stadsholmen – the area now referred to as Gamla Stan. The esker enters the current city area at Norrtull […]
Publiceringsdatum
Författare
ANDERS CRONSTRÖM
Nyckelord (Keyword)
water supply, sewerage, municipal water and sewerage history
Nummer
2
Årgång
42
Utgåva
Recently Stockholm’s two water treatment plants – at Norsborg and on the island of Lovö – have been completely automated and computerised. At the Lovö plant there is already a central computer with understations for steering and controlling the plant. At the end of 1985 corresponding equipment was ordered for the Norsborg plant from the […]
Publiceringsdatum
Författare
LARS-ERIK ERIKSSON, and ULF JORDVALL
Nyckelord (Keyword)
computerised water works in Stockholm
Nummer
2
Årgång
42
Utgåva
Relaying water conduits and sewers in the conventional manner is an extremely expensive operation. In the central parts of Stockholm the price of relaying pipelines per metre is normally SEK 10,000. Although on the outskirts of the city the corresponding price is admittedly lower, somewhere about SEK 5,000, this too may be considered high in […]
Publiceringsdatum
Författare
OVE THORESSON
Nummer
2
Årgång
42
Utgåva
The Stockholm Water and Wastewater Works have studied the needs for sewer rehabilitation to maintain an acceptable standard. The planning of the rehabilitation is being performed in three different steps. The first step was an overview in 1983 called ”The Stockholm Sewer System. Master Plan 1983”. It includes a summary of reported problems together with […]
Publiceringsdatum
Nyckelord (Keyword)
sewer rehabilitation, strategy, priority
Nummer
2
Årgång
42
Utgåva
Storm water from 1,520 acres of Järvafältet north of Stockholm is treated by means of sedimentation in a 12 km long tunnel system with a volume of 275,000 m3. Storm water is thus given a long detention time before it is pumped out into Edsviken. Earlier a report has been given of one year’s pilot […]
Publiceringsdatum
Författare
AN HJORT, and ÅKE SIKSTRÖM
Nyckelord (Keyword)
storm water, sewage treatment, sedimentation tunnel
Nummer
2
Årgång
42
Utgåva
It has been more and more common to use centrifuges for the removal of sludge during sewage processing. The centrifuge process is relatively complex and requires valuable polymers to be effective. In addition reject water is re-introduced for re-purification which usually entails an inordinate extra load on the sewage plant, particularly during periods of high […]
Publiceringsdatum
Författare
SIXTEN DE BESCHE, GERDT FLADDA, , and HANS WIKSELL
Nummer
1
Årgång
41
Utgåva
A monitoring system is described which provides continuous measurements of selected pollutants in stormwater. The system, which has been installed at both the outfall to a storm-water pipe system and in a gullypot, is sensitive to changes in pH, conductivity, dissolved oxygen concentration, temperature and redox potential. At the stormwater outfall monitoring station rapid changes […]
Publiceringsdatum