Overview
Koholmens avloppsreningsverk serves Karlskrona, Sweden, treating wastewater for approximately 58,000 people. The plant operates under Sweden's implementation of the EU Urban Waste Water Treatment Directive.
Koholmens avloppsreningsverk is a municipal wastewater treatment plant located on Verkö island in Karlskrona, Blekinge County, Sweden. It serves a population of approximately 58,000, making it a medium-to-large agglomeration under EU classification. The plant is situated in a coastal region of the Baltic Sea. As a Swedish facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. Sweden's national regulations enforce strict nutrient removal standards, particularly for plants discharging into sensitive areas like the Baltic Sea. The designed capacity is 1.00 (likely in thousands of cubic meters per day or similar unit), indicating a substantial infrastructure. The treated effluent is discharged into the Baltic Sea, a brackish inland sea with limited water exchange, making it highly sensitive to nutrient pollution. The plant plays a key role in protecting the coastal waters of Blekinge archipelago, supporting marine biodiversity and reducing eutrophication risks in the Baltic Sea basin.
Environmental context
The plant discharges into the Baltic Sea, a semi-enclosed sea with a fragile ecosystem prone to eutrophication from nutrient inputs. The receiving waters include the Karlskrona archipelago, which supports diverse marine life and is an important area for fish spawning and migratory birds. The Baltic Sea's limited water exchange makes it particularly sensitive to nitrogen and phosphorus loads, requiring advanced treatment standards.
Frequently asked questions
The plant is located on Verkö island in Karlskrona, Blekinge County, Sweden, along the Baltic Sea coast.
The plant serves approximately 58,000 people, classifying it as a medium-to-large agglomeration under EU standards.
Treated wastewater is discharged into the Baltic Sea, a sensitive brackish water body that requires strict nutrient removal to prevent eutrophication.
The plant operates under Sweden's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment and nutrient removal for discharges into sensitive areas like the Baltic Sea.
Swedish plants of this scale typically employ mechanical, biological, and chemical treatment stages, including phosphorus precipitation and nitrogen removal, to meet stringent Baltic Sea protection standards.
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