Overview
Valladolid wastewater treatment plant serves over 750,000 people in Castilla y León, Spain. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for large agglomerations.
The Valladolid wastewater treatment plant is a major municipal facility located in the city of Valladolid, in the autonomous community of Castilla y León, Spain. Serving a population of over 750,000, it is classified as a large agglomeration under European Union regulations, requiring advanced treatment to protect sensitive water bodies. As a large-scale plant, it is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary biological treatment for all agglomerations over 15,000 population equivalent, and tertiary treatment for those discharging into sensitive areas. The plant's capacity and treatment processes are designed to meet these stringent standards, ensuring compliance with Spanish and EU water quality regulations. The treated effluent is discharged into the Pisuerga River, a tributary of the Duero River, which flows westward into Portugal and eventually reaches the Atlantic Ocean near Porto. The Duero basin supports diverse aquatic ecosystems and is an important water resource for agriculture and drinking water supply in the region.
Environmental context
The plant discharges into the Pisuerga River, a major tributary of the Duero River. The Duero basin is one of the largest watersheds in the Iberian Peninsula, supporting rich biodiversity and providing water for irrigation and urban use. Downstream, the river flows through the Arribes del Duero Natural Park before entering Portugal and reaching the Atlantic Ocean. The plant's advanced treatment helps protect these ecosystems from nutrient pollution and organic load.
Frequently asked questions
The plant is located on Camino Viejo de Simancas in Valladolid, Castilla y León, Spain, with coordinates 41.612°N, -4.778°W.
The plant serves a population of 751,600, making it a large agglomeration under EU classification.
Treated effluent is discharged into the Pisuerga River, a tributary of the Duero River, which flows to the Atlantic Ocean.
As a large agglomeration over 150,000 population equivalent, the plant must meet strict standards under the EU UWWTD, including secondary treatment and potentially tertiary treatment to protect sensitive areas.
Plants of this scale in Spain typically employ advanced secondary treatment with nutrient removal, and often tertiary treatment, to comply with EU directives and protect downstream water bodies.
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