Nittel Wastewater Treatment Plant, Rheinland-Pfalz, Germany

The Nittel wastewater treatment plant is located in the municipality of Nittel, in the state of Rheinland-Pfalz, Germany. It serves a population of approximately 3,550 residents, making it a small to medium-sized facility under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant is situated along the Moselle River, a major tributary of the Rhine. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU directive for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive water bodies. The plant's designed capacity is 3,880 m³/day, and it currently discharges an average of 370 m³/day, indicating significant spare capacity for future growth. The treated effluent is discharged into the Moselle River, which flows into the Rhine and eventually reaches the North Sea. The Moselle is an ecologically important river that supports diverse aquatic life, including fish species such as salmon and eel. The advanced treatment helps maintain water quality in this transboundary river system, which is used for drinking water abstraction, recreation, and navigation.

The plant discharges into the Moselle River, a major tributary of the Rhine. The Moselle flows through Germany, Luxembourg, and France before joining the Rhine at Koblenz. The Rhine then drains into the North Sea. The Moselle watershed supports diverse aquatic ecosystems, including fish migration routes for Atlantic salmon and European eel. Advanced treatment at this plant helps reduce nutrient loads that could otherwise contribute to eutrophication in downstream waters.