DISTROFF Wastewater Treatment Plant, Distroff, Grand Est, France

The DISTROFF wastewater treatment plant is located in Distroff, a commune in the Moselle department of the Grand Est region, France. It serves a population of approximately 4,800 residents, making it a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated inland, away from coastal areas, and its operations are part of the regional water management infrastructure. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU UWWTD for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. The plant has a designed capacity of 7,500 m³/day and currently treats an average daily flow of 856.31 m³/day, indicating significant spare capacity for future growth. The treated effluent is discharged into local watercourses that eventually drain into the Moselle River, a major tributary of the Rhine. The Rhine basin is a densely populated and industrialized region, and advanced treatment helps reduce nutrient loads that could contribute to eutrophication in downstream water bodies, including the North Sea. The plant's operation supports the ecological health of the Moselle and Rhine rivers.

The DISTROFF plant discharges into local streams that flow into the Moselle River, which joins the Rhine and ultimately reaches the North Sea. The Moselle-Rhine basin supports diverse aquatic life and is an important migratory corridor for fish. Advanced treatment at this plant helps control nutrient pollution, reducing the risk of algal blooms and oxygen depletion in downstream waters, which is critical for maintaining water quality in this ecologically sensitive transboundary river system.