1992-4

Direct determinations of the distribution of mercury between aqueous phase and sludge phase have not been made earlier. One reason might be the low concentration level of mercury, which is close to or below the detection limit for the analytical procedures in common use. The mercury concentration in the sludge phase is however much higher […]

Private water-supply wells, fed by acidic groundwater, commonly have problems with corrosion of household connections. To control these problems the water can be treated in filter units containing calcerous materials. At the Department of Sanitary Engineering, Chalmers University of Technology, filter materials for neutralisation have been investigated. The materials tested were crushed limestone (CaCO3) and […]

Infiltration facilities have become more common during recent years due to problems associated with the conventional storm watersystems, such as overflows and the release of pollutants into receiving waters. In northern Sweden, stormwater pipes and manholes have often been damaged by frost heave and ice formations, resulting in overflows during the snow melt period. In […]

To be able to use the available volumes as effectively as possible in a process for combined biological phosphorus and nitrogen removal, knowledge about the variations during the day and the week is needed. This work is a comparison between the behaviour in the unaerated reactors during a typical wednesday (high COD/TKN ratio) and a […]

The Center for Environmental Monitoring at the Swedish University of Agricultural Sciences has on commission by the Swedish Environmental Protection Agency (SEPA), and as a part of the current inspection of national and regional environmental monitoring programmes, evaluated the regional freshwater monitoring programmes supervised by the County Administrations in Sweden. The task has been to […]

The Swedish Environmental Protection Agency has been commissioned by the Swedish Government to evaluate the present and propose a new environmental monitoring and assessment programme for Sweden. Decisions on the new national monitoring programme will be taken in February 1993 and decisions on the regional programmes later in the spring. The aims of the proposed […]