Bonheiden Wastewater Treatment Plant: Advanced Treatment in Antwerpen, Belgium

Bonheiden wastewater treatment plant is located in the municipality of Bonheiden, within the province of Antwerpen, Belgium. The facility serves a population of approximately 4,500 people, placing it in the small agglomeration category under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated inland, more than 10 km from the coast, and its operations are part of the regional wastewater infrastructure managed by the Flemish region. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU UWWTD for agglomerations of this size. With a designed capacity of 5,130 m³/day and an actual discharge volume of about 804 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The advanced treatment level ensures high-quality effluent, reducing nutrient loads and protecting receiving water bodies. The treated effluent from Bonheiden ultimately drains into the local river system, which is part of the Scheldt basin. The Scheldt River flows through Belgium and the Netherlands before discharging into the North Sea. The plant's advanced treatment helps maintain water quality in this ecologically important basin, supporting aquatic life and downstream uses such as drinking water production and recreation.

Bonheiden's treated wastewater discharges into local waterways that are part of the Scheldt River basin. The Scheldt flows through Flanders and into the Netherlands, eventually reaching the North Sea. This basin supports diverse aquatic ecosystems and is an important migratory corridor for fish. The advanced treatment at Bonheiden reduces nutrient pollution, helping to mitigate eutrophication risks in downstream waters and the coastal zone.