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 […]
Författare
ANDERS WISTRÖM
Årgång
1989
Nummer
3
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). […]
Författare
MAGNUS EMANUELSSON
Nyckelord (Keyword)
nitrogen reduction, pilot test, pre-denitrification, chemical precipitation, methanol.
Årgång
1989
Nummer
3
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 […]
Författare
STIG MORLING, and BENNY JOHANSSON
Nyckelord (Keyword)
leachates, SBR-technics, low temperature, concentrated waste waters, nitrogen removal.
Årgång
1989
Nummer
3
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 […]
Författare
RONNY BERNDTSSON, and WILLIAM HOGLAND and MAGNUS LARSSON,
Nyckelord (Keyword)
combined sewer overflow discharge quality, wash-out, pollutants, sedimentation.
Årgång
1989
Nummer
3
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 […]
Författare
LARS HÅKANSON
Nyckelord (Keyword)
environmental consequence analysis, lakes, rivers, marine areas, eutrophication, contamination, acidification, load diagrams, cost-benefit analysis.
Årgång
1989
Nummer
3
Utgåva