Overview
Serignan Valras wastewater treatment plant serves Sérignan, Occitanie, France, with a population equivalent of 34,148. It is located near the Mediterranean coast, within 50 km of the shoreline.
Serignan Valras is a wastewater treatment plant serving the commune of Sérignan in the Occitanie region of southern France. The plant is situated near the Mediterranean coast, within 50 km of the shoreline, and handles wastewater from a population equivalent of approximately 34,148 people. As part of France's wastewater infrastructure, it operates under the European Union's Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size, with potential tertiary treatment if discharging into sensitive areas. Under the EU directive, plants serving between 10,000 and 150,000 population equivalent must achieve secondary treatment as a minimum, and the plant's coastal proximity may necessitate additional nutrient removal to protect marine water quality. The regulatory framework ensures compliance with discharge standards set by French authorities. The plant's treated effluent ultimately reaches the Mediterranean Sea, likely via local watercourses or direct discharge. The coastal environment supports diverse marine life and is important for tourism and fisheries. Effective treatment is critical to prevent eutrophication and protect bathing water quality along the popular Languedoc coastline. The plant contributes to safeguarding the ecological health of the Gulf of Lion and adjacent marine habitats.
Environmental context
The plant's discharge enters the Mediterranean Sea near the Gulf of Lion, a region known for its rich marine biodiversity and important fisheries. The coastal waters support seagrass meadows and nursery habitats for fish species. Nutrient loading from wastewater can lead to algal blooms and oxygen depletion, so advanced treatment is essential to maintain water quality and protect the sensitive marine ecosystem. The area also hosts migratory bird routes and is part of a broader network of coastal wetlands.
Frequently asked questions
The plant is located at Chemin de la Cave-Boyère, Sérignan Les Plages, in the commune of Sérignan, Hérault department, Occitanie region, France.
The plant serves a population equivalent of approximately 34,148 people, covering the urban area of Sérignan and potentially nearby communities.
The treated effluent is discharged into the Mediterranean Sea, likely via a local watercourse or outfall. The plant's coastal location requires compliance with stringent discharge standards to protect marine water quality.
As a French plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations over 2,000 PE. For plants near sensitive coastal areas, tertiary treatment may be required to reduce nutrients.
Plants of this scale in France typically provide secondary biological treatment (activated sludge or similar) and often include nutrient removal (nitrogen and phosphorus) to meet EU standards, especially when discharging to sensitive marine environments.
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