ESPIEL Wastewater Treatment Plant, Espiel, Andalucía, Spain

The ESPIEL wastewater treatment plant is located in Espiel, a municipality in the province of Córdoba, Andalucía, Spain. It serves a population of 2,079 and operates with secondary treatment, which is standard for small agglomerations under Spanish and EU regulations. The plant's designed capacity is 2,424 m³/day, and it treats an average daily flow of 376.81 m³/day. As a secondary treatment facility, ESPIEL meets the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for all agglomerations above 2,000 population equivalent discharging into freshwater. The plant's discharge volume and capacity indicate it is operating well below its design capacity, suggesting room for future growth or seasonal variations. The treated effluent from ESPIEL is discharged into a local watercourse that eventually drains into the Guadalquivir River basin, one of Spain's major river systems. The Guadalquivir flows through Andalucía and into the Atlantic Ocean at the Gulf of Cádiz. The plant plays a key role in protecting local streams and the downstream Guadalquivir ecosystem from nutrient pollution and pathogens.

The ESPIEL plant discharges into a tributary of the Guadalquivir River basin, which flows through southern Spain and empties into the Gulf of Cádiz (Atlantic Ocean). The Guadalquivir supports diverse aquatic life, including migratory fish species, and its estuary is an ecologically sensitive area. Secondary treatment at this plant helps reduce organic load and suspended solids, protecting downstream water quality and the ecological health of the river and coastal zone.