PINA DE EBRO Wastewater Treatment Plant, Pina de Ebro, Aragón, Spain

PINA DE EBRO is a municipal wastewater treatment plant located in Pina de Ebro, a town in the Ribera Baja del Ebro comarca of Zaragoza province, Aragón, Spain. The plant serves a population of 3,433 and operates under secondary treatment, which is the standard biological treatment for organic matter removal. As a small agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC), the plant is required to provide secondary treatment. The designed capacity of 4,667 m³/day indicates the plant is sized for a larger population, but current discharge volume is 622.22 m³/day, suggesting significant spare capacity. The plant is operated as part of Spain's national wastewater infrastructure, regulated by the Confederación Hidrográfica del Ebro. The treated effluent is discharged into the Ebro River basin, which flows through northeastern Spain to the Mediterranean Sea. The Ebro River is one of the most important rivers in Spain, supporting diverse aquatic life and providing water for agriculture and urban use. The plant's secondary treatment helps protect the river's water quality and downstream ecosystems.

The plant discharges into the Ebro River basin, which drains into the Mediterranean Sea via the Ebro Delta. The Ebro River supports a rich ecosystem, including migratory fish species and extensive wetlands. The delta is an ecologically sensitive area that relies on adequate nutrient management to prevent eutrophication. Secondary treatment reduces organic pollutants and suspended solids, contributing to the health of the river and downstream marine environment.