Overview
Oxelosunds Avloppsreningsanlaggningar serves the city of Oxelösund, Sweden, treating wastewater for approximately 22,529 people. The plant is located near the Baltic Sea coast, within 50 km of the shoreline.
Oxelosunds Avloppsreningsanlaggningar is the municipal wastewater treatment plant serving Oxelösund, a coastal city in Södermanland County, Sweden. The facility handles wastewater from a population of around 22,529, placing it in the medium agglomeration category under Swedish and EU regulations. As a Swedish plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant's designed capacity is 1.00 (likely in thousands of cubic meters per day), indicating it is sized to handle the local load. Swedish plants typically employ mechanical, biological, and chemical treatment steps to meet stringent discharge standards. The treated effluent is discharged into the Baltic Sea via local watercourses. The Baltic Sea is a sensitive brackish water body with limited water exchange, making nutrient removal critical to prevent eutrophication. The plant's location near the coast underscores its role in protecting this vulnerable marine environment.
Environmental context
The plant discharges into the Baltic Sea, a semi-enclosed brackish sea with high ecological sensitivity. The Baltic suffers from eutrophication due to nutrient inputs, so treatment plants in this region must achieve advanced nutrient removal. The local watershed drains through small coastal streams into the sea, supporting diverse aquatic life and migratory fish. Protecting this downstream environment requires strict adherence to EU and national water quality standards.
Frequently asked questions
The plant is located in Oxelösund, Södermanland County, Sweden, near the SSAB steelworks. It serves the municipality of Oxelösund.
The plant serves approximately 22,529 people, classifying it as a medium-sized agglomeration under EU wastewater treatment directives.
Treated wastewater is discharged into the Baltic Sea via local watercourses. The plant's proximity to the coast means effluent must meet strict nutrient removal standards to protect the sensitive marine environment.
As a Swedish plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations over 2,000 population equivalent. Sweden also enforces national standards for nitrogen and phosphorus removal to combat Baltic Sea eutrophication.
Plants of this scale in Sweden typically employ mechanical, biological, and chemical treatment stages, including activated sludge processes and chemical precipitation for phosphorus removal. Many also include nitrogen removal to meet Baltic Sea protection requirements.
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