WARCHIN DECL Wastewater Treatment Plant, Tournai, Hainaut, Belgium

WARCHIN DECL is a municipal wastewater treatment plant located in the Rumillies district of Tournai, within the Hainaut province of Wallonia, Belgium. The plant serves a small population of 376 residents and is designed to handle a capacity of 7,000 m³ per day, with an actual discharge volume of 67.21 m³ per day. As a secondary treatment facility, WARCHIN DECL provides biological treatment to remove organic matter and suspended solids, meeting the standards required under the EU Urban Waste Water Treatment Directive (91/271/EEC). For small agglomerations like this, secondary treatment is the standard requirement, ensuring that effluent quality is suitable for discharge into the environment. The treated effluent from WARCHIN DECL is discharged into local watercourses that eventually drain into the Scheldt River basin, which flows through Belgium and the Netherlands into the North Sea. The plant plays a key role in protecting the water quality of the Scheldt basin and the downstream marine environment from nutrient pollution and organic loading.

The plant discharges into the Scheldt River basin, which drains into the North Sea via the Western Scheldt estuary. This basin supports diverse aquatic life and is an important migratory corridor for fish. The secondary treatment provided by the plant helps reduce organic and nutrient loads, protecting the ecological health of the river and coastal waters.