Overview
STMERLOSE is a closed advanced wastewater treatment plant in Holbæk, Denmark, serving 736 people. It had a designed capacity of 2000 m³/day and discharged 145.83 m³/day.
STMERLOSE is a former advanced wastewater treatment plant located in Holbæk, Region Sjælland, Denmark. The plant served a population of 736 people and was part of the municipal wastewater infrastructure for the Holbæk Kommune area. The plant operated with advanced treatment processes, meeting the high standards required under the EU Urban Waste Water Treatment Directive (91/271/EEC). With a designed capacity of 2000 m³/day and an actual discharge volume of 145.83 m³/day, the facility was well within its operational limits before closure. As a closed facility, STMERLOSE no longer discharges treated wastewater. During its operation, it would have protected local water bodies and contributed to the environmental health of the region, which drains towards the Isefjord and ultimately the Kattegat sea. The advanced treatment level ensured minimal impact on the surrounding ecosystem.
Environmental context
The plant is situated inland in Holbæk, Region Sjælland, within the catchment area that drains towards the Isefjord, a shallow fjord connected to the Kattegat sea. The Isefjord supports diverse aquatic life and is an important area for bird migration and fish spawning. Advanced treatment at the plant would have helped maintain water quality in this ecologically sensitive coastal ecosystem.
Frequently asked questions
STMERLOSE is located at 9, Tåstrupvej, Store Tåstrup, Holbæk, Holbæk Kommune, Region Sjælland, Denmark.
STMERLOSE served a population of 736 people before its closure.
STMERLOSE provided advanced treatment, which includes nutrient removal and disinfection, exceeding the secondary treatment standard required by the EU Urban Waste Water Treatment Directive.
Danish wastewater treatment plants operate under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates advanced treatment for sensitive areas. STMERLOSE's advanced treatment level aligns with these requirements for protecting the Isefjord and Kattegat.
In Denmark, small agglomerations under 2,000 population equivalent typically require secondary treatment or equivalent. Advanced treatment may be implemented in sensitive areas to meet nutrient reduction targets.
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