PLANTA EXP TBC CARRION - Advanced Wastewater Treatment in Huévar del Aljarafe, Spain

PLANTA EXP TBC CARRION is an advanced wastewater treatment facility located in Huévar del Aljarafe, within the province of Sevilla, Andalucía, Spain. The plant serves a population of approximately 3,973 and has a designed capacity of 4,000 m³ per day, with an average discharge volume of 720.10 m³ per day. As an advanced treatment plant, it goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size (under 10,000 population equivalent), the directive requires appropriate treatment, and Spain's implementation ensures compliance with receiving water quality objectives. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Guadalquivir River basin and the Atlantic Ocean. The Guadalquivir is a major ecological corridor supporting diverse aquatic life and migratory bird species. The advanced treatment helps protect downstream ecosystems, including the Doñana wetlands, a critical habitat for waterfowl and endangered species.

The plant discharges into the Guadalquivir River basin, which flows southwest through Andalucía and empties into the Gulf of Cádiz (Atlantic Ocean). This watershed supports ecologically sensitive areas, including marshes and estuaries that are vital for migratory birds and aquatic biodiversity. Advanced treatment reduces nutrient loading, helping to prevent eutrophication in downstream coastal waters.