Salgueiro Wastewater Treatment Plant, Oliveira de Azeméis, Portugal

Salgueiro is a wastewater treatment plant located in Oliveira de Azeméis, in the Aveiro district of Portugal. It serves a population of approximately 70,000 people, making it a medium-to-large agglomeration under EU classification. The plant is situated in the Santiago de Riba-Ul area, near the Ul River. As a Portuguese facility, Salgueiro operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant's designed capacity is 1. 00 (likely in thousands of cubic meters per day), indicating it is sized to handle the local population's wastewater load. Compliance with national and EU regulations ensures treated effluent meets quality standards before discharge. The plant's treated effluent is discharged into the Ul River, a tributary of the Vouga River, which flows into the Ria de Aveiro, a coastal lagoon on the Atlantic Ocean. This lagoon is an ecologically sensitive area that supports diverse aquatic life and migratory birds. The plant plays a key role in protecting this downstream environment from nutrient pollution and other contaminants.

The Salgueiro plant discharges into the Ul River, which flows into the Vouga River and ultimately reaches the Ria de Aveiro, a coastal lagoon on the Atlantic Ocean. This lagoon is an ecologically important area that supports diverse aquatic life, including fish and bird species, and is a key stopover for migratory birds. The plant's treatment helps prevent nutrient enrichment and contamination in this sensitive coastal ecosystem.