Overview
RETIERS wastewater treatment plant serves Retiers, France, with advanced treatment. It processes 564 m³/day of wastewater and has a designed capacity of 4000 m³/day, serving a population of 3160.
The RETIERS wastewater treatment plant is located in Retiers, in the Brittany region of northwestern France. It serves a population of 3160 and operates with advanced treatment processes, ensuring high-quality effluent discharge. The plant has a designed capacity of 4000 m³/day and currently processes approximately 564 m³/day of wastewater. As an advanced treatment facility, RETIERS goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent French and European standards. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, but RETIERS exceeds this requirement with advanced treatment, reflecting a commitment to environmental protection. The treated effluent is discharged into local watercourses that drain into the Vilaine River basin and eventually into the Atlantic Ocean. The plant plays a key role in protecting the region's water quality, supporting aquatic ecosystems and downstream uses such as agriculture and recreation.
Environmental context
The RETIERS plant discharges into the local watershed, which is part of the Vilaine River basin. The Vilaine flows into the Atlantic Ocean via the Bay of Biscay. This region supports diverse aquatic life and is important for migratory fish species. Advanced treatment helps minimize nutrient loading, protecting downstream water bodies from eutrophication.
Frequently asked questions
The RETIERS plant is located at Le Pont Hessant, Retiers, in the Ille-et-Vilaine department of Brittany, France.
The plant serves a population of 3160 people in the Retiers area.
RETIERS uses advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants, ensuring high-quality effluent.
The plant discharges into local streams that feed the Vilaine River, which flows into the Atlantic Ocean. Advanced treatment helps protect these water bodies from pollution.
As a French plant, RETIERS operates under the EU Urban Waste Water Treatment Directive (91/271/EEC). For its population size, secondary treatment is required, but RETIERS exceeds this with advanced treatment, demonstrating strong environmental compliance.
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