Overview
JANZE wastewater treatment plant serves the commune of Janzé in Brittany, France. It treats wastewater from a population of approximately 5,670 under the EU Urban Waste Water Treatment Directive.
The JANZE wastewater treatment plant is located in Janzé, a commune in the Ille-et-Vilaine department of Brittany, France. Serving a population of around 5,670, the plant is part of the region's municipal wastewater infrastructure, managed under French water law and the EU Urban Waste Water Treatment Directive (91/271/EEC). As a small agglomeration (under 10,000 population equivalent), the plant is required to provide appropriate treatment to meet EU standards. French plants of this scale typically employ biological treatment systems to reduce organic matter and nutrients before discharge. The plant discharges treated effluent into local watercourses that flow into the Vilaine River basin, ultimately reaching the Atlantic Ocean. The receiving waters support diverse aquatic life and are important for regional agriculture and biodiversity. Proper treatment helps protect downstream ecosystems and water quality in the Brittany region.
Environmental context
The JANZE plant discharges into the Vilaine River basin, which drains into the Atlantic Ocean via the Vilaine estuary. The watershed supports agricultural activities and sensitive aquatic habitats, including wetlands and fish spawning grounds. Effective nutrient removal is critical to prevent eutrophication in downstream coastal waters.
Frequently asked questions
The JANZE plant is located at D 48, La Châlerie, Janzé, in the Ille-et-Vilaine department of Brittany, France.
The plant serves approximately 5,670 people in the commune of Janzé and surrounding areas.
Treated effluent from the JANZE plant is discharged into local watercourses that flow into the Vilaine River basin, ultimately reaching the Atlantic Ocean.
The plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment for agglomerations of its size, and is subject to French water law.
For small agglomerations in France, secondary biological treatment is standard, often including activated sludge or similar processes to reduce organic pollutants and nutrients.
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