Overview
SJAELSO wastewater treatment plant serves Birkerød, Denmark, in the Region Hovedstaden. It operates under the EU Urban Waste Water Treatment Directive, serving a population of 7,231.
SJAELSO is a wastewater treatment plant located in Birkerød, Rudersdal Kommune, in the Region Hovedstaden of Denmark. The plant serves a population of 7,231, placing it in the small agglomeration category under EU regulations. Its designed capacity is 1.00 (likely in thousand cubic meters per day or similar unit), indicating a facility sized for this community. As a Danish plant, SJAELSO is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this scale. Denmark implements this directive through national legislation, with oversight by the Danish Environmental Protection Agency. The regulatory framework ensures compliance with discharge standards. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Øresund strait, a marine water body connecting the Baltic Sea to the Kattegat. This coastal discharge point is within 50 km of the coast, making the plant's nutrient removal performance important for protecting the sensitive marine environment of the Øresund, which supports diverse aquatic life and is an important migratory corridor.
Environmental context
SJAELSO's treated effluent flows into local watercourses that drain into the Øresund, a strait between Denmark and Sweden connecting the Baltic Sea to the Kattegat. The Øresund is an ecologically sensitive marine area that supports diverse aquatic life, including fish, seabirds, and benthic communities. Nutrient inputs from wastewater can contribute to eutrophication, so the plant's compliance with EU standards for nitrogen and phosphorus removal is critical for protecting this coastal ecosystem.
Frequently asked questions
SJAELSO is located at 83 Bakkevej, Birkerød, in the Rudersdal Kommune, Region Hovedstaden, Denmark.
SJAELSO serves a population of 7,231, classifying it as a small agglomeration under EU regulations.
The plant discharges treated wastewater into local watercourses that drain into the Øresund strait, a marine water body between Denmark and Sweden.
SJAELSO operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), implemented through Danish national law, which mandates secondary treatment for agglomerations of this size.
For small agglomerations like SJAELSO, the EU directive requires secondary treatment, which typically involves biological processes to remove organic matter and nutrients. Danish plants often include nitrogen and phosphorus removal to protect sensitive coastal waters.
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