BELIN BELIET Wastewater Treatment Plant, Belin-Béliet, Nouvelle-Aquitaine

The BELIN BELIET wastewater treatment plant is located in Belin-Béliet, a commune in the Gironde department of Nouvelle-Aquitaine, southwestern France. The plant serves a population of approximately 2,285 people and is situated along the Route de l'Eyre, near the Eyre River. It is part of the municipal wastewater infrastructure for the Arcachon area. 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 2,700 cubic meters per day and a current discharge volume of about 408 m³/day, the facility operates well within its capacity. Advanced treatment typically includes nutrient removal to protect sensitive receiving waters. The treated effluent is discharged into the Eyre River, which flows into the Bassin d'Arcachon, a large lagoon on the Atlantic coast. The Bassin d'Arcachon is an ecologically significant area supporting diverse aquatic life, including oyster beds and migratory birds. The plant's advanced treatment helps protect this sensitive coastal ecosystem from nutrient pollution.

The plant discharges into the Eyre River, which flows into the Bassin d'Arcachon, a coastal lagoon connected to the Atlantic Ocean. The Bassin d'Arcachon is a productive estuary supporting oyster farming, seagrass beds, and migratory bird populations. Advanced treatment at the plant reduces nutrient loads, helping to prevent eutrophication and maintain water quality in this ecologically sensitive lagoon.