FREDRIKSBERG ARV - Advanced Wastewater Treatment Plant in Fredriksberg, Sweden

FREDRIKSBERG ARV is an advanced wastewater treatment plant located in Palmheden, Fredriksberg, within Ludvika municipality, Dalarna County, Sweden. The facility serves a population of approximately 1,502 residents, classifying it as a small agglomeration under EU classification standards. The plant provides advanced treatment, which goes beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. The plant has a designed capacity of 5,714 cubic meters per day and currently discharges an average of 235.79 cubic meters per day. The treated effluent is discharged into a local watercourse that ultimately drains into the Dalälven River basin, which flows into the Baltic Sea. The Dalälven is one of Sweden's major rivers, supporting diverse aquatic ecosystems and providing habitat for species such as Atlantic salmon and sea trout. The advanced treatment helps minimize nutrient loading to the Baltic Sea, a region sensitive to eutrophication.

The plant discharges into a tributary of the Dalälven River, which flows southeast into the Baltic Sea. The Dalälven basin supports a variety of freshwater and brackish water ecosystems, including wetlands and riparian forests. The Baltic Sea is a semi-enclosed sea with limited water exchange, making it highly sensitive to nutrient pollution. Advanced treatment at this plant helps reduce nitrogen and phosphorus inputs, contributing to the health of downstream aquatic habitats and mitigating eutrophication risks.