Donso avr verk - Advanced Wastewater Treatment Plant in Donsö, Sweden

Donso avr verk is an advanced wastewater treatment plant located on the island of Donsö in the Göteborg archipelago, part of Västra Götaland County, Sweden. The plant serves the local community in this coastal setting, providing tertiary-level treatment to protect the sensitive marine environment of the Kattegat. As an advanced treatment facility, Donso avr verk likely incorporates nutrient removal processes, which are standard for Swedish plants discharging into the Baltic Sea catchment under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant's treated effluent is discharged into the coastal waters of the Kattegat, a sea area connecting the Baltic Sea to the North Sea. This region supports diverse marine life, including fish stocks and seabird colonies, and is an important shipping corridor. The advanced treatment helps minimize eutrophication risks in the sensitive Baltic Sea ecosystem.

Donso avr verk discharges into the coastal waters of the Kattegat, which connects the Baltic Sea to the North Sea. The Kattegat is a nutrient-sensitive marine area where nitrogen and phosphorus inputs can drive algal blooms and oxygen depletion. The plant's advanced treatment reduces these impacts, protecting local fish habitats and migratory bird populations that rely on the archipelago's waters.