Lilla Edets avloppsreningsverk - Advanced Wastewater Treatment in Lilla Edet, Sweden

Lilla Edets avloppsreningsverk is a municipal wastewater treatment facility located in Lilla Edet, Västra Götaland County, Sweden. The plant serves a population of approximately 4,120 residents, classifying it as a small agglomeration under Swedish and EU regulations. It is situated near the Göta älv river, which flows through the region and ultimately reaches the Kattegat sea area. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 9,500 cubic meters per day and a current discharge volume of about 647 cubic meters per day, the facility operates well within its capacity, ensuring effective treatment of incoming wastewater. The advanced treatment level likely includes nutrient removal to protect sensitive downstream waters. The treated effluent is discharged into the Göta älv river system, which drains into the Kattegat, a transitional water body between the Baltic Sea and the North Sea. This area supports diverse aquatic life and is important for fisheries and marine biodiversity. By providing advanced treatment, the plant helps reduce nutrient loads and other pollutants, safeguarding water quality in the river and the downstream marine environment.

The plant discharges into the Göta älv river, which flows through southwestern Sweden and empties into the Kattegat, a sea area connecting the Baltic and North Seas. The Kattegat supports important commercial fisheries and is a migratory corridor for marine species. Advanced treatment at this plant helps minimize eutrophication risks and protects the ecological health of the river and coastal waters.