KLAPPENS ARV Wastewater Treatment Plant, Dalarnas län, Sweden

KLAPPENS ARV is a wastewater treatment facility located in Dalarnas län, Sweden, within the municipality of Malung-Sälens kommun. The plant serves a population of approximately 3,352 people, classifying it as a small agglomeration under Swedish and EU regulations. It is situated inland, away from coastal areas, and treats wastewater from the local community. 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). This level of treatment typically includes nutrient removal, such as nitrogen and phosphorus reduction, to protect sensitive receiving waters. The plant has a designed capacity of 6,785 cubic meters per day and currently discharges an average of 526.20 cubic meters per day, indicating significant spare capacity. The treated effluent from KLAPPENS ARV is discharged into local watercourses that eventually drain into the Dalälven River basin. The Dalälven River flows eastward into the Baltic Sea, supporting diverse aquatic ecosystems. The advanced treatment helps minimize nutrient loading and protects downstream water quality in this ecologically sensitive region.

The plant discharges into local streams that feed into the Dalälven River system, which flows through central Sweden into the Baltic Sea. The Dalälven basin supports diverse aquatic life, including salmonid populations, and is an important migratory corridor. Advanced treatment at KLAPPENS ARV reduces nutrient inputs, helping to prevent eutrophication in the Baltic Sea, a water body sensitive to nitrogen and phosphorus pollution.