Overview
Alcantara wastewater treatment plant serves 699,000 people in Lisbon, Portugal. Located near the Tagus River estuary, it operates under EU Urban Waste Water Treatment Directive requirements for large agglomerations.
Alcantara is a major wastewater treatment plant serving the city of Lisbon, Portugal, with a population equivalent of 699,000. The facility is situated in the Docas area of Estrela, near the historic port district, and plays a critical role in managing the wastewater of Portugal's capital city. As a large agglomeration serving over 150,000 people, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires advanced treatment for discharges into sensitive areas. The Tagus River estuary is a sensitive ecosystem, and the plant's treatment processes are designed to meet stringent nutrient removal standards to protect water quality. The treated effluent is discharged into the Tagus River estuary, which flows into the Atlantic Ocean near Lisbon. The estuary supports diverse aquatic life and is an important migratory corridor for birds. The plant's operation is essential for maintaining the ecological health of this coastal and marine environment.
Environmental context
The Alcantara plant discharges into the Tagus River estuary, a large and ecologically sensitive water body that supports diverse aquatic life and serves as a critical habitat for migratory birds. The estuary flows into the Atlantic Ocean near Lisbon, making the plant's nutrient removal performance vital for preventing eutrophication in coastal waters. The surrounding watershed includes urban and industrial areas, requiring robust treatment to mitigate pollution impacts.
Frequently asked questions
The Alcantara plant is located in the Docas area of Estrela, Lisbon, Portugal, near the Tagus River estuary.
The plant serves approximately 699,000 people, making it a large agglomeration under EU classification.
Treated effluent from Alcantara is discharged into the Tagus River estuary, which flows into the Atlantic Ocean.
As a plant serving over 150,000 people, Alcantara is classified as a large agglomeration under the EU UWWTD, requiring advanced treatment to protect sensitive receiving waters like the Tagus estuary.
Plants of this scale in Portugal typically employ secondary treatment with nutrient removal (tertiary treatment) to meet EU standards for sensitive areas, ensuring protection of coastal and estuarine ecosystems.
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