Domblans Wastewater Treatment Plant - Advanced Treatment in Bourgogne-Franche-Comté, France

The Domblans wastewater treatment plant is located in the commune of Domblans, within the Jura department of Bourgogne-Franche-Comté, France. It serves a population of approximately 3,167 and is part of the region's municipal wastewater infrastructure. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 5,000 m³/day and an actual discharge volume of 564.99 m³/day, the plant operates well below its capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, but Domblans exceeds this standard with advanced treatment. The treated effluent is discharged into a local watercourse that eventually flows into the Seille River, a tributary of the Saône, which joins the Rhône River before reaching the Mediterranean Sea. The plant plays a key role in protecting the local watershed and downstream aquatic ecosystems from nutrient pollution and other contaminants.

The plant discharges into a small stream that feeds the Seille River, part of the Saône-Rhône basin. This watershed supports diverse aquatic life and is important for migratory fish species. The advanced treatment helps reduce nutrient loads, protecting downstream water quality in the Rhône River and the Mediterranean Sea.