Persbo Avloppsreningsverk - Advanced Wastewater Treatment in Norberg, Sweden

Persbo Avloppsreningsverk is a wastewater treatment facility located in the Davidsbo industrial area near Norberg, in Västmanland County, Sweden. The plant serves a population of about 4,294, placing it in the small to medium agglomeration category under Swedish and EU regulations. The plant employs advanced treatment processes, which typically include biological nutrient removal and possibly tertiary filtration or chemical dosing to meet stringent discharge standards. With a designed capacity of 8,000 m³/day and an average daily flow of 674 m³, the facility operates well below its maximum capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that eventually drain into the Baltic Sea via the Dalälven river system. As part of Sweden's commitment to the EU Urban Waste Water Treatment Directive, the plant's advanced treatment helps protect sensitive downstream ecosystems, including coastal waters and marine environments.

The plant discharges into local streams that flow into the Dalälven river, which ultimately reaches the Baltic Sea. The Baltic Sea is a brackish, semi-enclosed sea with limited water exchange, making it sensitive to nutrient pollution. Advanced treatment at this plant helps reduce nitrogen and phosphorus loads, mitigating eutrophication risks in coastal waters and supporting aquatic biodiversity.