Overview
AUSSEVIELLE SIROS 2 is a municipal wastewater treatment plant serving Denguin in Nouvelle-Aquitaine, France. It treats wastewater for approximately 5,746 people under the EU Urban Waste Water Treatment Directive.
AUSSEVIELLE SIROS 2 is a municipal wastewater treatment plant located in Denguin, a commune in the Pyrénées-Atlantiques department of Nouvelle-Aquitaine, southwestern France. The plant serves a population of approximately 5,746 people, placing it in the small-to-medium agglomeration category under European Union classification. As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size discharging into freshwater. The directive also requires appropriate treatment to protect sensitive areas, which may include nutrient removal if the receiving water body is designated as sensitive. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Gave de Pau river system. This river flows through the Pyrenees foothills and joins the Adour river before reaching the Bay of Biscay in the Atlantic Ocean. The downstream environment supports diverse aquatic life and is important for regional water quality.
Environmental context
The plant discharges into the Gave de Pau river basin, a tributary of the Adour river system that flows into the Bay of Biscay. This watershed supports diverse aquatic ecosystems, including fish populations such as salmon and trout, and is an important corridor for migratory species. The region's climate and terrain contribute to seasonal flow variations that influence dilution and assimilative capacity.
Frequently asked questions
AUSSEVIELLE SIROS 2 is located at Rue du Colombier in Denguin, a commune in the Pyrénées-Atlantiques department of Nouvelle-Aquitaine, southwestern France.
The plant serves approximately 5,746 people, classifying it as a small-to-medium agglomeration under EU classification.
The treated effluent is discharged into the local watershed, which drains into the Gave de Pau river system, a tributary of the Adour river that flows into the Bay of Biscay.
As a French wastewater treatment plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size discharging into freshwater.
Under the EU UWWTD, plants serving between 2,000 and 10,000 population equivalent are generally required to provide secondary treatment (biological treatment) to meet effluent quality standards.
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