Overview
SAINT CLEMENT Trifontaine is an advanced wastewater treatment plant in Montferrier-sur-Lez, Occitanie, France, serving 1,100 people with a design capacity of 2,200 m³/day.
SAINT CLEMENT Trifontaine is an advanced wastewater treatment plant located in Montferrier-sur-Lez, near Montpellier in the Occitanie region of southern France. The plant serves a small population of approximately 1,100 residents and has a design capacity of 2,200 m³/day, with a current discharge volume of 196.24 m³/day. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. The treated effluent is discharged into the local watershed, which ultimately drains into the Mediterranean Sea via the Lez River and coastal lagoons. The plant's proximity to the coast (within 10 km) means its discharge can affect sensitive marine and coastal ecosystems, making advanced treatment particularly important for protecting water quality and biodiversity.
Environmental context
The plant discharges into the Lez River basin, which flows into the Mediterranean Sea near Montpellier. The coastal zone includes ecologically sensitive areas such as the Étang de l'Or lagoon, a vital habitat for migratory birds and aquatic species. Advanced treatment helps reduce nutrient loading that could otherwise contribute to eutrophication in these coastal waters.
Frequently asked questions
The plant is located at Impasse de la Grand Font, Les Aigueillères, Montferrier-sur-Lez, in the Hérault department of Occitanie, France.
The plant serves approximately 1,100 residents in the Montferrier-sur-Lez area.
The treated effluent is discharged into the local watershed, which flows into the Lez River and eventually reaches the Mediterranean Sea.
The plant provides advanced treatment, which includes nutrient removal to protect sensitive coastal waters, exceeding the EU Urban Waste Water Treatment Directive's secondary treatment requirement for small agglomerations.
As a French plant serving fewer than 2,000 people, it falls under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment before discharge. Its advanced treatment aligns with the directive's goals for protecting sensitive areas like the Mediterranean coast.
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