Bolidens Avlrenverk - Advanced Wastewater Treatment in Boliden, Sweden

Bolidens Avlrenverk is an advanced wastewater treatment plant located in Boliden, a locality in Skellefteå Municipality, Västerbottens län, Sweden. The plant serves a population of approximately 2,785 people, making it a small-scale facility within the Swedish wastewater infrastructure. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 3,000 m³/day and an actual discharge volume of 437.19 m³/day, the plant operates well within its capacity. As a Swedish facility, it complies with national regulations that implement the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment for discharges to sensitive areas. The treated effluent is discharged into local watercourses that eventually drain into the Gulf of Bothnia, part of the Baltic Sea. The plant plays a key role in protecting downstream aquatic ecosystems from nutrient pollution, supporting the ecological health of the region's rivers and coastal waters.

The plant discharges into local streams that flow into the Skellefte River, which ultimately reaches the Gulf of Bothnia in the Baltic Sea. This coastal region supports diverse aquatic life and is important for fish spawning and migratory birds. Advanced treatment helps reduce nutrient loading, which is critical for preventing eutrophication in the sensitive Baltic Sea ecosystem.