Overview
Bilzen wastewater treatment plant serves approximately 18,900 people in Beverst, Limburg, Belgium. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
The Bilzen wastewater treatment plant is located in Beverst, a submunicipality of Bilzen in the Limburg province of Flanders, Belgium. The facility serves a population of around 18,900, classifying it as a medium-sized agglomeration under EU regulations. Its inland position places it within the Meuse River basin, contributing to the region's water management infrastructure. As a Belgian plant serving a population between 10,000 and 100,000, the facility is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC). This directive requires secondary treatment for all discharges from agglomerations of this size, with more stringent tertiary treatment if the receiving waters are designated as sensitive areas. The regulatory framework ensures a minimum level of treatment to protect water quality. The treated effluent from the Bilzen plant ultimately drains into the Demer River, a tributary of the Dyle River, which flows into the Scheldt estuary and eventually reaches the North Sea. The plant plays a key role in safeguarding local watercourses from nutrient pollution and organic load, supporting aquatic ecosystems and downstream water quality in the Scheldt basin.
Environmental context
The Bilzen plant discharges into the Demer River, which flows into the Dyle River, part of the Scheldt basin that empties into the North Sea. This watershed supports diverse aquatic life and is an important ecological corridor in Flanders. The region's dense population and agricultural activity make effective wastewater treatment critical to prevent eutrophication and maintain water quality in the downstream estuary.
Frequently asked questions
The Bilzen wastewater treatment plant is located at Pruinveld 1 in Beverst, a submunicipality of Bilzen in the Limburg province of Flanders, Belgium.
The plant serves approximately 18,900 people, classifying it as a medium-sized agglomeration under EU regulations.
The plant treats wastewater that would otherwise impact the Demer River, a tributary of the Dyle River, which flows into the Scheldt estuary and ultimately the North Sea.
Under the EU UWWTD (91/271/EEC), agglomerations of 10,000 to 100,000 population equivalent must provide secondary treatment. The Bilzen plant, serving 18,900 people, is required to meet this standard, with possible tertiary treatment if the receiving waters are sensitive.
In Belgium, plants of this scale typically employ secondary biological treatment, such as activated sludge or trickling filters, to reduce organic matter and suspended solids. Some may also include nutrient removal if discharging into sensitive areas.
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