MEQUINENZA Wastewater Treatment Plant, Mequinenza, Aragón, Spain

The MEQUINENZA wastewater treatment plant is located in Mequinenza, in the province of Zaragoza, within the autonomous community of Aragón, Spain. It serves a population of approximately 1,924 residents, providing secondary treatment to meet local sanitation needs. As a secondary treatment facility, the plant removes organic matter and suspended solids through biological processes. With a designed capacity of 8,000 cubic meters per day, it operates well below its capacity, treating an average daily volume of 348.72 cubic meters. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, which this facility fulfills. The treated effluent is discharged into the local water system, which ultimately drains into the Ebro River basin. The Ebro River is one of Spain's major rivers, flowing into the Mediterranean Sea. The plant's operations help protect downstream water quality and aquatic ecosystems in the Ebro basin.

The plant discharges into the Ebro River basin, which flows through northeastern Spain and empties into the Mediterranean Sea via the Ebro Delta. The delta is an ecologically important area supporting diverse bird species and aquatic life. The plant's secondary treatment reduces organic pollution, helping to maintain water quality in the river and downstream ecosystems.