Overview
BOURG EN BRESSE Viriat wastewater treatment plant serves approximately 137,400 people in Viriat, Auvergne-Rhône-Alpes, France. It operates under the EU Urban Waste Water Treatment Directive.
The BOURG EN BRESSE Viriat wastewater treatment plant is located in Viriat, a commune in the Ain department of the Auvergne-Rhône-Alpes region, France. The plant serves a population of approximately 137,400 people, classifying it as a large agglomeration under EU regulations. As a large agglomeration, the plant is required to meet secondary treatment standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). For discharges into sensitive areas, tertiary treatment may be mandated to reduce nutrients like nitrogen and phosphorus. The regulatory framework ensures compliance with EU standards. The treated effluent is discharged into the local watershed, which ultimately drains into the Rhône River basin. The Rhône River flows into the Mediterranean Sea, supporting diverse aquatic ecosystems along its course. The plant plays a key role in protecting downstream water quality and the ecological health of the region.
Environmental context
The plant discharges into the Rhône River basin, which flows through southeastern France into the Mediterranean Sea. The Rhône supports diverse aquatic life and is an important migratory corridor for fish species. The watershed includes sensitive areas that may require nutrient removal to prevent eutrophication in downstream water bodies.
Frequently asked questions
The plant is located in Viriat, a commune in the Ain department of the Auvergne-Rhône-Alpes region, France, near Bourg-en-Bresse.
The plant serves approximately 137,400 people, classifying it as a large agglomeration under EU regulations.
The treated effluent is discharged into the local watershed, which drains into the Rhône River basin and ultimately reaches the Mediterranean Sea.
As a large agglomeration serving over 100,000 people, the plant must comply with the EU UWWTD, which requires secondary treatment and, if discharging into sensitive areas, tertiary treatment for nutrient removal.
In France, plants of this scale typically employ secondary biological treatment, often with nutrient removal to meet EU standards for sensitive areas, such as those in the Rhône basin.
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