Overview
OLSTYKKE wastewater treatment plant serves Roskilde, Denmark, with a population equivalent of 10,820. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
OLSTYKKE is a wastewater treatment plant located in Roskilde, Region Sjælland, Denmark. It serves a population equivalent of 10,820, classifying it as a medium agglomeration under EU regulations. The plant is situated inland, approximately 50 km from the coast, and its operations are integral to the local water management infrastructure. As a Danish facility, OLSTYKKE is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations between 10,000 and 150,000 population equivalent. The directive also mandates more stringent treatment if the receiving waters are sensitive to eutrophication. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Baltic Sea via the Roskilde Fjord and the Øresund strait. The Baltic Sea is a brackish water body sensitive to nutrient pollution, making effective wastewater treatment crucial for protecting marine ecosystems and supporting biodiversity in the region.
Environmental context
OLSTYKKE's treated effluent flows into the Roskilde Fjord, a shallow estuary connected to the Øresund and the Baltic Sea. The Baltic Sea is a semi-enclosed sea with limited water exchange, making it vulnerable to eutrophication from nutrient inputs. The plant's location within 50 km of the coast means its discharge can influence coastal water quality, supporting diverse aquatic life and migratory fish species in the fjord.
Frequently asked questions
OLSTYKKE is located in Roskilde, Region Sjælland, Denmark, at Vibesøvej 6, 4000 Roskilde.
OLSTYKKE serves a population equivalent of 10,820, classifying it as a medium-sized agglomeration under EU regulations.
OLSTYKKE discharges treated wastewater into the local watershed, which flows into Roskilde Fjord and eventually reaches the Baltic Sea.
OLSTYKKE operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of its size and potentially tertiary treatment if the receiving waters are sensitive.
In Denmark, plants serving around 10,000 people typically provide secondary biological treatment as a minimum, with nutrient removal often required to protect sensitive coastal waters like the Baltic Sea.
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