KA ST PETER Wastewater Treatment Plant, St. Peter, Baden-Württemberg

KA ST PETER is an advanced wastewater treatment plant located in St. Peter, a municipality in the Breisgau-Hochschwarzwald district of Baden-Württemberg, Germany. The plant serves a population of approximately 2,600 residents and has a designed capacity of 4,600 m³/day, with a current discharge volume of 541.36 m³/day. As an advanced treatment facility, KA ST PETER goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus, which is typical for plants in sensitive catchment areas under the EU Urban Waste Water Treatment Directive (91/271/EEC). Germany's strict national standards require advanced treatment for agglomerations of this size when discharging into sensitive water bodies. The treated effluent from KA ST PETER flows into the local stream network, eventually reaching the Dreisam River, a tributary of the Rhine. The Rhine basin is a major European waterway supporting diverse aquatic ecosystems and providing drinking water for millions. The plant's advanced treatment helps protect downstream water quality in this ecologically important region.

The plant discharges into small streams that feed the Dreisam River, which flows into the Rhine. The Rhine basin is a critical ecological corridor in Europe, supporting migratory fish species and diverse aquatic life. Advanced treatment at KA ST PETER reduces nutrient loading, helping to prevent eutrophication in downstream waters including the North Sea.