Overview
Bjorklinge Avloppsreningsverk is an advanced wastewater treatment plant serving approximately 3,900 people in Björklinge, Sweden. It operates with a designed capacity of 5,500 m³/day and discharges treated effluent into local waterways.
Bjorklinge Avloppsreningsverk is a municipal wastewater treatment facility located in Björklinge, Uppsala County, Sweden. The plant serves a population of approximately 3,900 residents, classifying it as a small to medium agglomeration under Swedish and EU regulations. It is situated inland, about 50 km from the Baltic Sea coast. 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 5,500 m³/day and a current discharge volume of 613 m³/day, the facility operates well below its capacity, indicating room for future growth. The plant is part of Sweden's robust wastewater infrastructure, which emphasizes nutrient removal to protect sensitive water bodies. The treated effluent is discharged into local streams that eventually flow into the Baltic Sea via the Fyrisån river system and Lake Mälaren. This discharge contributes to the overall water quality in the region, supporting aquatic life and recreational uses. The plant's advanced treatment helps reduce nutrient loading, mitigating eutrophication risks in the Baltic Sea, a major ecological concern for the region.
Environmental context
The plant discharges into the Fyrisån river basin, which drains into Lake Mälaren and ultimately the Baltic Sea. The Baltic Sea is a brackish water body highly sensitive to nutrient pollution, particularly nitrogen and phosphorus, which can cause algal blooms and hypoxia. The advanced treatment at this plant helps reduce the nutrient load, supporting the ecological health of downstream waters and the coastal environment.
Frequently asked questions
The plant is located in Björklinge, Uppsala County, Sweden, approximately 50 km inland from the Baltic Sea coast.
The plant serves approximately 3,900 residents, classifying it as a small to medium agglomeration under EU wastewater directives.
Treated effluent is discharged into local streams within the Fyrisån river basin, which flows into Lake Mälaren and then the Baltic Sea.
The plant provides advanced treatment, which includes nutrient removal beyond secondary treatment, in line with Swedish standards for sensitive areas.
Under the EU Urban Waste Water Treatment Directive, agglomerations of this size require at least secondary treatment. The plant's advanced treatment exceeds this requirement, helping protect the Baltic Sea from eutrophication.
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