Overview
Villanubla wastewater treatment plant serves 7,000 people in Castilla y León, Spain. It provides secondary treatment and discharges 749.32 m³/day of treated effluent.
The Villanubla wastewater treatment plant is located in the municipality of Villanubla, Valladolid, in the autonomous community of Castilla y León, Spain. It serves a population of approximately 7,000 residents, making it a small to medium agglomeration under EU classification. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges into freshwater and estuaries from agglomerations of this size. The designed capacity is 7,000 m³/day, and the actual discharge volume is 749.32 m³/day, indicating a utilization rate well below capacity. The treated effluent is discharged into a local watercourse that ultimately drains into the Duero River basin. The Duero River flows westward through Spain and Portugal, emptying into the Atlantic Ocean at Porto. The plant's operation helps protect the local aquatic environment and downstream water quality.
Environmental context
The plant discharges into a tributary of the Duero River, which flows through the Castilla y León region and into Portugal. The Duero basin supports diverse aquatic life and is an important agricultural and ecological corridor. The plant's secondary treatment reduces organic pollutants and suspended solids, helping to maintain the ecological health of the river system and prevent eutrophication in downstream reservoirs and the Atlantic coastal zone.
Frequently asked questions
The plant is located in Villanubla, in the province of Valladolid, Castilla y León, Spain.
The plant serves approximately 7,000 residents, classifying it as a small to medium agglomeration under EU standards.
The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive for discharges into freshwater bodies from agglomerations of this size.
Under the EU UWWTD (91/271/EEC), agglomerations with a population equivalent between 2,000 and 10,000 must provide secondary treatment for discharges into freshwater and estuaries. Villanubla, serving 7,000 people, complies with this requirement.
The treated effluent is discharged into a local watercourse that flows into the Duero River basin, eventually reaching the Atlantic Ocean.
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