LAUZACH Kerudo Wastewater Treatment Plant, Lauzach, Bretagne, France

LAUZACH Kerudo is a wastewater treatment plant located in the commune of Lauzach, in the Morbihan department of Bretagne, France. The plant serves a population of approximately 3,643 residents and is situated in a rural area near the Gulf of Morbihan. The plant provides advanced treatment, which goes beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 6,000 m³/day and an actual discharge volume of 649.90 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, and advanced treatment is typical in sensitive areas like the Gulf of Morbihan. The treated effluent is discharged into local watercourses that eventually drain into the Gulf of Morbihan, a semi-enclosed marine inlet of the Bay of Biscay. The Gulf is an ecologically sensitive area supporting diverse marine life, including seagrass beds and migratory birds. The plant's advanced treatment helps protect this fragile coastal ecosystem from nutrient pollution.

The plant discharges into local streams that flow into the Gulf of Morbihan, a semi-enclosed marine inlet on the southern coast of Bretagne. The Gulf is an ecologically sensitive area with rich biodiversity, including seagrass meadows, shellfish beds, and important bird populations. The advanced treatment at LAUZACH Kerudo helps reduce nutrient loads, protecting the Gulf from eutrophication and supporting its ecological health.