KONSTEN ATT VÄRDERA VATTEN Ett exempel från Motala Ströms avrinningsområde / On the valuation of water resources A pilot study in the Motala River Basin
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 […]
Författare MARIANNE LÖWGREN
Nyckelord (Keyword) Motala Ströms avrinningsområde. ekonomisk värdering, miljökostnader. vattentjänster
PLANT AVAILABILITY OF PHOSPHORUS IN ASH, CALCIUM PHOSPHATE AND DIFFERENT TYPES OF SEWAGE SLUDGE / Fosforns växttillgänglighet i olika typer av slam, mineralgödsel samt aska
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, […]
Författare LINDERHOLM. K., PALM. O., PERSSON. P.
Nyckelord (Keyword) recycling, sewage sludge, precipitation chemicals, field experiment, phosphorus.
FOSFORNS VÄXTTILLGÄNGLIGHET OCH DESS EFFEKT PÅ MYKORRHIZA / Phosphorus in soil and its impact on arbuscular mycorrhiza
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 […]
Författare LINDERHOLM K., PALM O. och PERSSON P.
Nyckelord (Keyword) phosphorus, pot experiment, Arbuscular Mycorrhiza
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. […]
Författare JYRKI RÖPELINEN, ESKO LAKSO and JARMO SALLANKO
Nyckelord (Keyword) phosphorus removal, septic tanks
CHEMICAL DENITRIFICATION DURING EVAPORATION/DRYING OF LANDFILL LEACHATES / Kemisk denitrifikation vid avdunstning/torkning av lakvatten
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 […]
Författare ALEKSANDRA NIKOLIC and BENGT HULTMAN
Nyckelord (Keyword) Chemical denitrification: conductivity; evaporation/drying; leachate; nitrogen removal.
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 […]
Författare SACHIDA N. KAPILASHRAMI, KLAS CEDERWALL and ERIK LEVLIN
Nyckelord (Keyword) Flood events, NPS contaminants, risk assessment, toxicity, pesticide, herbicide and volatile organic compounds.