L Aldea Wastewater Treatment Plant, Deltebre, Catalunya, Spain

L Aldea is a wastewater treatment plant located in Deltebre, within the Baix Ebre region of Tarragona, Catalunya, Spain. It serves a population of approximately 2,232 people, making it a small-scale municipal facility. The plant is situated inland, about 50 km from the Mediterranean coast, and plays a key role in managing local wastewater in the Ebro Delta area. The plant provides 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. With a designed capacity of 6,400 m³/day and a current discharge volume of 599.51 m³/day, the facility operates well below its capacity, indicating room for future growth or seasonal variations. Secondary treatment typically involves biological oxidation and sedimentation to reduce organic matter and suspended solids. The treated effluent is discharged into the local water system, which ultimately drains into the Ebro River delta and the Mediterranean Sea. The Ebro Delta is an ecologically sensitive area known for its rich biodiversity, including important bird habitats and rice paddies. The plant's operation under Spanish and EU regulations helps protect this fragile downstream environment from nutrient pollution and other contaminants.

The plant discharges into the Ebro River basin, which flows into the Ebro Delta, a major wetland area on the Mediterranean coast of Spain. The delta supports diverse aquatic life, including fish, crustaceans, and migratory birds, and is a key agricultural zone for rice cultivation. Secondary treatment helps reduce organic load and nutrients, mitigating the risk of eutrophication in the delta's lagoons and coastal waters.