SE SUNDHOUSE SCHOENAU Wastewater Treatment Plant, Schœnau, Grand Est, France

SE SUNDHOUSE SCHOENAU is a municipal wastewater treatment plant located in Schœnau, a commune in the Bas-Rhin department of the Grand Est region in northeastern France. The plant serves a population of approximately 3,700 residents and is situated in the rural Alsatian plain near the German border. The plant provides secondary biological treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size (2,000-10,000 population equivalent). The designed capacity is 3,000 m³/day, and the average daily discharge volume is 660 m³/day, indicating the plant operates well below its design capacity. The plant is operated as part of the local municipal wastewater infrastructure. The treated effluent is discharged into local watercourses that ultimately drain into the Rhine River basin. The Rhine is a major European waterway flowing through Germany and the Netherlands into the North Sea. The plant's operation helps protect the sensitive aquatic ecosystems of the Rhine basin from nutrient pollution and organic contaminants.

The plant discharges into the local watershed that feeds the Rhine River, one of Europe's most important waterways. The Rhine basin supports diverse aquatic life and provides drinking water for millions of people. Downstream, the river flows through the Upper Rhine Valley, a region with ecologically sensitive floodplain forests and wetlands. The treated effluent eventually reaches the North Sea, contributing to the overall nutrient load in the marine environment. The plant's secondary treatment helps reduce organic matter and suspended solids, but does not remove nutrients like nitrogen and phosphorus, which can contribute to eutrophication in downstream waters.