PETROLA Wastewater Treatment Plant, Pétrola, Albacete, Spain

PETROLA is a wastewater treatment plant located in Pétrola, a municipality in the province of Albacete, within the autonomous community of Castilla-La Mancha, Spain. The plant serves a population of approximately 2,145 people, reflecting its role in managing domestic wastewater for this small inland community. The plant operates with secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, ensuring the effluent meets quality standards before discharge. The treated effluent is discharged into local water bodies, ultimately contributing to the hydrological network of the Júcar River basin, which drains into the Mediterranean Sea. The plant's operations help protect the local environment and downstream ecosystems from pollution.

The plant discharges into the Júcar River basin, which flows through eastern Spain and empties into the Mediterranean Sea. The region's semi-arid climate makes water quality management critical for sustaining aquatic life and agricultural uses downstream. The plant's secondary treatment helps reduce nutrient loads that could otherwise contribute to eutrophication in receiving waters.