FEM-ANALYS AV STRÖMNINGSFÖRHÅLLANDENA I EN DAGVATTENDAMM / FEM-analysis of the hydraulic conditions in a stormwater detention pond
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 […]
Författare JONAS GERMAN och HENRIK KANT
Nyckelord (Keyword) stormwater, detention pond, flow pattern, simulation, particle removal, FEM, FIDAP.
LÅNGSAMFILTRERING – EN ENKÄTUNDERSÖKNING AV SVENSKA FILTER Slow Sand Filtration – an Investigation of Swedish Slow Sand Filters
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 […]
Författare ESSIE ANDERSSON, TORSTEN HEDBERG och LENNART MARTINET
Nyckelord (Keyword) slow sand filter, biological treatment, drinking water treatment.
PHOSPHORUS MANAGEMENT AND SOCIETAL STRUCTURE Hampered effluent accumulation processes (HEAP) in different areas of the Swedish society / Fosforhantering och samhällsstruktur Ackumulationseffekter i det svenska samhället
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 […]
Författare FOLKE GUNTHER
Nyckelord (Keyword) accumulation processes, balanced agriculture, energy efficiency, integrated habitats, nutrient recycling, phosphorus management, scenario analysis.
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
Författare RICHARD HANSSON
Nyckelord (Keyword) GRP pipes, underground installation, design, buckling, DF-factors, probability calculations, safety index, safety factors.
LUKT OG SMAK AV DRIKKEVANN – KAN VI IDENTIFISERE PROBLEMKOMPONENTENE? / Drinking water off-flavours – can we identify their chemical constituents?
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 […]
Författare INGUN SKJEVRAK
Nyckelord (Keyword) Off-flavours, odour and taste, drinking water, VOC, analysis
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 […]
Författare A. NYBERG, P.JOHANSSON, M. BEIER, A. HIPPEN, C. F. SEYFRIED and K.-H. ROSENWINKEL
Nyckelord (Keyword) aerobic deammonification, sludge liquor, nitritation, denitritation