South Ormastorp is a constructed wetland in the Råå river catchment area located in the northwest of Skåne. The aim of the wetland is to decrease the diffuse leaching of nutrients from Råå river to Öresund. During three weeks South Ormastorp was intensively studied. Runoff was continuously measured and water samples were collected daily (Monday–Friday), […]
Författare
MALIN PLANANDER
Nyckelord (Keyword)
Wetland, pond, retention, nitrogen, phosphorus, denitrification, hydrology, water flow measurements
Årgång
2005
Nummer
3
Utgåva
In this study, partial nitritation has the aim to oxidise a fraction of ammonium (about 50–60 %) into nitrite without following oxidation to nitrate. Experiments performed during eight months describe partial nitritation of supernatant from dewatering of digested sludge at Himmerfjärden wastewater treatment plant in the south Stockholm region. The process was the first step […]
Författare
LUIZA GUT, ELZ BIETA PLAZA, MAJA DLUGOLECKA and BENGT HULTMAN
Nyckelord (Keyword)
Free ammonia, nitrite, nitrite-to-ammonium ratio, oxygen uptake rate (OUR) test, partial nitritation,
supernatant.
Årgång
2005
Nummer
3
Utgåva
Eutrophication of lakes is a serious problem, especially in agricultural areas. It is mainly due to external and internal loads of phosphorus (P), which increase the P concentration in the lake water. Lake Bornsjön is a reserve source of water supply for Stockholm and is located 25 km southwest of the city. Maximum yearly concentration […]
Författare
ANNIKA LINDVALL och BARBRO ULÉN
Nyckelord (Keyword)
accelerating eutrophication, drinking water, hypolimnetic withdrawal, phosphorous loading,
oxygen consumption.
Årgång
2005
Nummer
3
Utgåva
Reliable mathematical models that can describe the mechanisms in Slow Sand Filters, SSF, represented by different filter parameters are yet absent. The extremely complicated interactions between physical, chemical, biological and hydraulic conditions are shown in a simplified model. An attempt to apply the rapid filtration empirical formulas for SSF is described in detail. The need […]
Författare
HUSAM SALEH JABUR, JONAS MÅRTENSSON and GEZA ÖLLÖS
Nyckelord (Keyword)
Hydraulics, modelling, theory, slow sand filtration, head loss, negative pressure.
Årgång
2005
Nummer
3
Utgåva
This article intends to describe how the German federal states (Bundesländer) chose to implement the public participation requirements (article 14) of the water framework directive (WFD). We describe which level of ambition they intend to reach, which models and tools they use and what kind of resources they have at their disposal to involve external […]
Författare
UWE STEPHAN och JAN-ERIK GUSTAFSSON
Nyckelord (Keyword)
Public participation, participatory process, Germany, Sweden, external actors, EU water framework
directive, financing, system of charges, cooperation.
Årgång
2005
Nummer
3
Utgåva