Overview
Vagnharads Avloppsreningsverk is an advanced wastewater treatment plant in Vagnhärad, Sweden, serving 4,356 people with a designed capacity of 6,000 m³/day.
Vagnharads Avloppsreningsverk is a municipal wastewater treatment plant located in Vagnhärad, Trosa kommun, Södermanlands län, Sweden. The plant serves a population of 4,356 and has a designed capacity of 6,000 m³/day, with an average discharge volume of 683.81 m³/day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), Sweden requires advanced treatment for agglomerations over 10,000 PE in sensitive areas; however, this smaller plant voluntarily meets high standards, reflecting Sweden's commitment to protecting the Baltic Sea. The treated effluent is discharged into local watercourses that eventually drain into the Baltic Sea via the Trosaån river system. The Baltic Sea is a brackish, ecologically sensitive water body facing eutrophication challenges, and advanced treatment helps reduce nutrient loads that contribute to algal blooms.
Environmental context
The plant's discharge enters the Trosaån river system, which flows into the Baltic Sea near Trosa. The Baltic Sea is a semi-enclosed brackish sea with limited water exchange, making it highly sensitive to nutrient pollution. Advanced treatment at this plant reduces nitrogen and phosphorus loads, helping to mitigate eutrophication and support aquatic life in the coastal zone.
Frequently asked questions
Vagnharads Avloppsreningsverk is located in Vagnhärad, Trosa kommun, Södermanlands län, Sweden.
The plant serves a population of 4,356 people.
The treated wastewater is discharged into local watercourses that flow into the Trosaån river system, which ultimately drains into the Baltic Sea.
The plant provides advanced treatment, which includes nutrient removal beyond secondary treatment, helping to reduce environmental impact on the Baltic Sea.
Sweden implements the EU Urban Waste Water Treatment Directive, which requires advanced treatment for larger agglomerations in sensitive areas. Although serving fewer than 10,000 people, this plant's advanced treatment aligns with Sweden's national goals for Baltic Sea protection.
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