ACIGNE THORIGNE, Cesson-Sévigné

Overview

ACIGNE THORIGNE wastewater treatment plant serves Cesson-Sévigné in Bretagne, France, treating wastewater for approximately 8,320 people. The facility operates under the EU Urban Waste Water Treatment Directive.

ACIGNE THORIGNE is a wastewater treatment plant located in Cesson-Sévigné, near Rennes in the Bretagne region of France. It serves a population of approximately 8,320 people, placing it in the small to medium agglomeration category under EU classification. The plant is situated inland, away from the coast, and its operations are part of the regional wastewater infrastructure managed by local authorities. As a French facility, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. The plant is expected to meet these regulatory standards to protect the local environment. The treated effluent from ACIGNE THORIGNE is discharged into the local watershed, which ultimately drains into the Vilaine River and then into the Atlantic Ocean. The plant plays a key role in maintaining water quality in the region, supporting aquatic life and downstream ecosystems. Its operation helps prevent nutrient pollution and protects the ecological health of the Vilaine basin.

Environmental context

The plant discharges into the Vilaine River basin, which flows through Bretagne and into the Atlantic Ocean. This watershed supports diverse aquatic life and is important for regional biodiversity. The plant's treatment helps reduce nutrient loads that could otherwise contribute to eutrophication in downstream coastal waters.

Frequently asked questions

The plant is located at Le Vault Martin, Cesson-Sévigné, in the Ille-et-Vilaine department of Bretagne, France, near the city of Rennes.

The plant serves approximately 8,320 people, classifying it as a small to medium agglomeration under EU regulations.

Treated effluent is discharged into the local watershed, which drains into the Vilaine River and eventually the Atlantic Ocean.

As a French plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size.

Under the EU UWWTD, plants serving 2,000 to 10,000 population equivalent typically require secondary treatment, with possible tertiary treatment if discharging into sensitive areas.