During autumn year 2000 a severe flood hit the Byälven river system in the western parts of Värmland, Sweden, causing damages of about MEUR 25–30. Afterwards local municipalities and the county board decided to investigate the possibilities of mitigating future floods and initiated the Byälven Project. What caused the flood and a number of flood […]
Författare
TORBJÖRN SVENSSON och FINN MIDBÖE
Nyckelord (Keyword)
Byälven, Glafsfjorden, flood, protective measures, hydraulic simulation, return period, risk-cost,
flood protection, natural disaster, high water levels
Årgång
2007
Nummer
1
Utgåva
The numerical model CE-QUAL-W2 was used for exploring hydraulic measures to minimize the water quality problems experienced by the water works at Aurevatn reservoir, Baerum municipality, serving sixty thousand inhabitants with potable water. The dystrophic nature of the reservoir water is reflected by high values for colour and total organic carbon. The composition of phytoplankton […]
Författare
Torulv Tjomsland and Olav M. Skulberg
Nyckelord (Keyword)
Cyanobacteria, CE-QUAL-W2, hydraulic management, microalgae, public water supply, water
quality, water quality model, water work
Årgång
2007
Nummer
1
Utgåva
Swedish wastewater treatment plants’ energy usage equals a total of 0.6 TWh per year. Together with the Swedish drinking water treatment, the usage corresponds to approximately 1 % of the total electrical energy consumption in Sweden. Potentials for a reduction of this usage do exist. However, very modest efforts for energy usage conservation are attempted.In […]
Författare
MATS HOLMBERG and ROBERT ANDERSSON
Nyckelord (Keyword)
Energy conservation; modelling; simulation; ASM1; energy balance
Årgång
2007
Nummer
1
Utgåva
Leachate constitutes the main potential long-term environmental risk of landfill emissions. The objective of this work is to identify the extent of major external influences on conductivity monitoring data and its implications for future monitoring programs. Data from three landfills in Sweden has been evaluated with the help ofmultivariate data analysis. With the aid of […]
Författare
Martijn van Praagh och Kenneth M Persson
Nyckelord (Keyword)
Landfill monitoring, leachate analysis, multivariate data analysis, PCA, CCA, electrical conductivity, final capping, leachate recirculation
Årgång
2007
Nummer
1
Utgåva
In wastewater treatment applications the MBR technology combines biological treatment and a membrane system to provide organic and suspended solids removal. Installation of low-pressure membranes within a biological reactor system replaces sedimentation, screening and media filtration as means of separating mixed liquor suspended solids (MLSS) from treated wastewater. This study is focused on experiments with […]
Författare
Maja Dlugolecka, Elzbieta Plaza and Alf-Göran Dahlberg
Nyckelord (Keyword)
designing of experiments (DOE), fouling phenomenon, membrane bioreactor (MBR), wastewater
Årgång
2007
Nummer
1
Utgåva