Overview
SAN CLAUDIO wastewater treatment plant serves Oviedo, Asturias, Spain, with a population equivalent of 31,900. The plant operates under the EU Urban Waste Water Treatment Directive.
The SAN CLAUDIO wastewater treatment plant is located in Oviedo, within the Asturias region of northern Spain. It serves a population equivalent of 31,900, classifying it as a medium-sized agglomeration under EU regulations. The plant is situated inland, approximately 50 km from the coast, and its treated effluent likely discharges into local rivers that flow toward the Bay of Biscay. As a Spanish facility, SAN CLAUDIO operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. The directive also requires more stringent treatment if the receiving waters are designated as sensitive areas. Compliance with the directive ensures that the plant meets European standards for pollutant removal. The plant's environmental significance lies in its role protecting the Nalón River basin or nearby water bodies, which drain into the Cantabrian Sea. The region supports diverse aquatic life, including salmonid populations, and the plant's operation helps maintain water quality for downstream ecosystems and recreational uses.
Environmental context
The SAN CLAUDIO plant discharges into the Nalón River basin, which flows northward into the Cantabrian Sea (Bay of Biscay). This coastal area supports diverse marine and estuarine habitats, including important fish spawning grounds. The plant's inland location reduces direct marine impact, but its effluent quality is critical for maintaining the ecological health of the river and downstream coastal waters.
Frequently asked questions
The SAN CLAUDIO plant is located in Los Carbayinos, Sograndio, Oviedo, in the Asturias region of northern Spain.
The plant serves a population equivalent of 31,900, classifying it as a medium-sized agglomeration under EU regulations.
The plant discharges treated effluent into the Nalón River basin, which flows northward to the Cantabrian Sea (Bay of Biscay).
As a Spanish facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size and potentially tertiary treatment if the receiving waters are sensitive.
For agglomerations between 10,000 and 150,000 population equivalent, the EU UWWTD mandates secondary treatment. In Spain, this typically involves biological treatment processes such as activated sludge or trickling filters, followed by disinfection if required for sensitive areas.
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