SKA Dewangen Aalen - Advanced Wastewater Treatment Plant in Aalen, Baden-Württemberg

SKA Dewangen Aalen is an advanced wastewater treatment facility located in the Dewangen district of Aalen, in the Ostalbkreis region of Baden-Württemberg, Germany. The plant serves a population of around 5,150 residents and has a designed capacity of 5,400 cubic meters per day, with an average discharge volume of 992.19 m³/day. As an advanced treatment plant, it goes beyond secondary biological treatment to remove nutrients such as nitrogen and phosphorus, meeting the stringent requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for sensitive areas. Germany's federal water law (WHG) and state-level regulations ensure that plants of this scale achieve high effluent quality standards. The treated effluent is discharged into local watercourses that ultimately drain into the Rhine River basin, contributing to the protection of the North Sea ecosystem. The plant plays a key role in safeguarding water quality in the region, supporting aquatic life and downstream uses.

The plant discharges into small streams in the Lein River catchment, which flows into the Kocher River, a tributary of the Neckar River, and eventually into the Rhine River and the North Sea. The region is characterized by mixed agricultural and urban land use, and the advanced treatment helps reduce nutrient loading that could otherwise contribute to eutrophication in downstream water bodies.