Overview
Ossela wastewater treatment plant serves the town of Ossela in Oliveira de Azeméis, Portugal, with a designed capacity of 1.00 and a population equivalent of 17,000.
The Ossela wastewater treatment plant is located in Bustelo do Caima, Ossela, within the municipality of Oliveira de Azeméis, Aveiro District, Portugal. It serves a population equivalent of 17,000, classifying it as a medium-sized agglomeration under Portuguese and EU regulations. As a Portuguese plant, Ossela operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size discharging into freshwater. The plant's treated effluent likely discharges into a local watercourse that drains into the Vouga River basin, ultimately reaching the Ria de Aveiro coastal lagoon and the Atlantic Ocean. This watershed supports diverse aquatic life and is an important ecological corridor in the region.
Environmental context
The Ossela plant is situated inland, approximately 50 km from the Atlantic coast, within the Vouga River basin. Its treated effluent flows into local streams that feed the Vouga River, which empties into the Ria de Aveiro, a coastal lagoon of high ecological importance. The lagoon supports diverse birdlife, fish species, and aquatic vegetation, making it a sensitive environment requiring effective wastewater treatment to prevent nutrient enrichment and habitat degradation.
Frequently asked questions
The Ossela plant is located at Rua Bustelo do Caima, Bustelo do Caima, Ossela, in the municipality of Oliveira de Azeméis, Aveiro District, Portugal.
The plant serves a population equivalent of 17,000, classifying it as a medium-sized agglomeration under EU standards.
The treated effluent from Ossela is discharged into local watercourses that drain into the Vouga River basin, ultimately reaching the Ria de Aveiro coastal lagoon and the Atlantic Ocean.
As a Portuguese facility, Ossela operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which mandates secondary treatment for agglomerations of this size discharging into freshwater.
Under the EU Urban Waste Water Treatment Directive, plants serving between 10,000 and 150,000 population equivalent are required to provide secondary treatment, with tertiary treatment in sensitive areas.
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