Villafranca de Ebro Wastewater Treatment Plant - Secondary Treatment in Aragón, Spain

The Villafranca de Ebro wastewater treatment plant is located in the municipality of Villafranca de Ebro, in the province of Zaragoza, Aragón, Spain. It serves a population of approximately 2,504 residents, classifying it as a small agglomeration under Spanish and EU regulations. The plant operates with secondary treatment, which is the minimum required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. Its designed capacity is 4,958 cubic meters per day, with an average daily discharge volume of 453.84 cubic meters, indicating significant reserve capacity. 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 via the Ebro Delta, an ecologically important area that supports diverse aquatic life and migratory bird species.

The plant discharges into the Ebro River basin, which flows through northeastern Spain and empties into the Mediterranean Sea at the Ebro Delta. The delta is a critical habitat for numerous bird species and supports extensive rice farming. The plant's secondary treatment helps protect downstream water quality in this ecologically sensitive river system.