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 […]
Författare
LARS-ANDERS HANSSON, LENNART J. LUNDQVIST och LARS DRAKE
Nyckelord (Keyword)
diversifierat brukande, produktion, brukande, konflikt, vatten, vattenvård
Årgång
2000
Nummer
2
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 […]
Författare
CURT FORSBERG
Nyckelord (Keyword)
Waste receiving waters, water quality, monitoring programmes, evaluation
Årgång
2000
Nummer
2
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 […]
Författare
MARIS KLAVINS, TALIS JUHNA, LINDA EGLI'TE
Nyckelord (Keyword)
humic substances, sorption, drinking water, artificial groundwater recharge
Årgång
2000
Nummer
2
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 […]
Författare
ANNELIE HEDSTRÖM
Nyckelord (Keyword)
Nitrogen, Ammonium, Nitrification, Adsorption, Rapid infiltration, Soil treatment system, Sand, Column experiment, Mass balance calculation
Årgång
2000
Nummer
2
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 […]
Författare
DAN FUJII
Nyckelord (Keyword)
activated sludge, biological phosphorus removal, computer simulation, full-scale, GPS-X, secondary P- release,UCT,VFA
Årgång
2000
Nummer
2
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 […]
Författare
HENRIETTE SÖDERBERG, KARIN S. TONDERSKI, ELISABETH JOHANSSON
Nyckelord (Keyword)
mark-växtsystem, Agenda 21, kommuner, attityder, organisation, aktörer, våtmarker, bevatrning, kväve
Årgång
2000
Nummer
2
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 […]
Författare
PETERHENRIKSEN, HANS UTKILEN og NINA GJÖLME
Nyckelord (Keyword)
Microcystin, cyanobacteria, water quality, toxin analysis.
Årgång
2000
Nummer
2
Utgåva