Denney Wastewater Treatment Plant: Advanced Treatment in Bourgogne-Franche-Comté, France

Denney wastewater treatment plant is located in the commune of Denney, within the Territoire-de-Belfort department in the Bourgogne-Franche-Comté region of eastern France. The facility serves a population of approximately 1,630 residents, placing it in the small agglomeration category under French regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 3,200 m³/day and an average discharge volume of 290.79 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variability. Treated effluent from the plant is discharged into local waterways that ultimately drain into the Rhine basin via the Savoureuse River and the Doubs River. The region is part of the larger Rhine-Meuse watershed, which supports diverse aquatic ecosystems and provides water for agriculture and industry downstream.

The plant discharges into the Savoureuse River, a tributary of the Doubs River, which flows into the Saône and eventually the Rhône River before reaching the Mediterranean Sea. This watershed supports diverse aquatic life, including fish species such as brown trout and grayling, and is an important corridor for migratory birds. The advanced treatment helps protect water quality in this sensitive river system.