Overview
QUIEVRAIN wastewater treatment plant serves Crespin, France, with secondary treatment. It has a designed capacity of 4,333 m³/day and discharges 721.61 m³/day, protecting local waterways.
The QUIEVRAIN wastewater treatment plant is located in Crespin, within the Hauts-de-France region of northern France. It serves a population of approximately 4,037 people, operating as a secondary treatment facility under the European Union's Urban Waste Water Treatment Directive (UWWTD). As a secondary treatment plant, QUIEVRAIN employs biological processes to reduce organic matter and suspended solids, meeting the EU standards for agglomerations between 2,000 and 10,000 population equivalent. The plant has a designed capacity of 4,333 m³/day and currently treats an average daily flow of 721.61 m³/day, indicating ample capacity for future growth. The treated effluent is discharged into local waterways that eventually drain into the Scheldt River basin and the North Sea. By providing secondary treatment, the plant helps protect the region's water quality and supports the ecological health of downstream aquatic environments, including sensitive estuarine and coastal areas.
Environmental context
The plant discharges into the Scheldt River basin, which flows through Belgium and the Netherlands before reaching the North Sea. This watershed supports diverse aquatic life and is an important migratory corridor for fish. The secondary treatment reduces nutrient loads, helping to prevent eutrophication in downstream estuaries and coastal zones.
Frequently asked questions
The QUIEVRAIN plant is located in Crespin, in the Hauts-de-France region of northern France, near the border with Belgium.
The plant serves approximately 4,037 people, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive.
The treated effluent is discharged into local waterways that flow into the Scheldt River basin, eventually reaching the North Sea.
The plant provides secondary treatment, which includes biological processes to remove organic matter and suspended solids, meeting EU standards for its size.
Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving 2,000-10,000 population equivalent must provide secondary treatment. QUIEVRAIN complies with this requirement.