MOLLKIRCH Wastewater Treatment Plant, Mollkirch, Grand Est, France

MOLLKIRCH is a municipal wastewater treatment plant located in Mollkirch, a commune in the Bas-Rhin department of the Grand Est region, France. The plant serves a population of approximately 2,000 residents, reflecting its role as a small-scale facility within the region's wastewater infrastructure. The plant operates with secondary treatment, which is the standard biological treatment stage required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The designed capacity is 2,730 m³/day, and the current discharge volume is 356.80 m³/day, indicating operational headroom. 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, supporting diverse aquatic ecosystems and providing drinking water for millions. The plant's secondary treatment helps protect these downstream environments from organic pollution.

The plant discharges into the local watershed, which is part of the larger Rhine River basin. The Rhine flows through the Grand Est region, eventually reaching the North Sea. This river system supports a variety of aquatic life, including fish species such as salmon and eel, and is an important ecological corridor. Secondary treatment reduces organic load and suspended solids, helping to maintain water quality in the downstream environment.