Oosterzele Wastewater Treatment Plant, Scheldewindeke, Belgium

The Oosterzele wastewater treatment plant is located in Scheldewindeke, a sub-municipality of Oosterzele in the province of Oost-Vlaanderen, Belgium. The facility serves a population of approximately 4,000 people, classifying it as a small agglomeration under Belgian and EU wastewater regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 9,900 m³/day and an average daily discharge of 715 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Scheldt River basin. The Scheldt flows through Belgium and the Netherlands before reaching the North Sea. The advanced treatment helps protect the sensitive aquatic ecosystems of the Scheldt estuary and the downstream coastal environment.

The plant discharges into the Scheldt River basin, which flows through Oost-Vlaanderen and into the Western Scheldt estuary in the Netherlands before reaching the North Sea. The Scheldt estuary is an ecologically important area that supports diverse aquatic life, including migratory fish species. Advanced treatment at this plant helps reduce nutrient loading and protect water quality in this sensitive downstream environment.