PAJANOSAS LAS Wastewater Treatment Plant, Guillena, Andalucía, Spain

PAJANOSAS LAS is an advanced wastewater treatment plant located in Guillena, in the province of Seville, Andalucía, Spain. The facility serves a population of approximately 2,100 people and has a designed capacity of 14,400 cubic meters per day, with a reported discharge volume of 380.62 cubic meters per day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. As a Spanish facility, it operates under the European Union's Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment based on the sensitivity of receiving waters and population size. For a plant of this scale, advanced treatment indicates that the receiving environment may be designated as a sensitive area. The treated effluent is discharged into the local watershed, which ultimately drains into the Guadalquivir River basin and then into the Atlantic Ocean. The plant plays a key role in protecting the water quality of the region, supporting both ecological health and downstream water uses.

The plant discharges into the Guadalquivir River basin, which flows through Andalucía and into the Gulf of Cádiz (Atlantic Ocean). This watershed supports diverse aquatic life and is important for agriculture and biodiversity. The advanced treatment helps protect sensitive downstream ecosystems from nutrient pollution.