Overview
Barreiro_Moita wastewater treatment plant serves Montijo, Portugal, with a population equivalent of 170,000. The facility is located within 50 km of the coast and discharges into the Tagus River estuary.
Barreiro_Moita is a wastewater treatment plant serving the municipality of Montijo in the Setúbal district of Portugal. The plant handles wastewater from a population equivalent of 170,000, placing it in the large agglomeration category under EU regulations. Its location near the Tagus River estuary makes it a critical facility for protecting coastal water quality. As a large agglomeration in Portugal, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum and tertiary treatment in sensitive areas. The Tagus estuary is a sensitive ecosystem, so advanced treatment is expected to reduce nutrient loads and protect biodiversity. The plant's designed capacity is 1. The treated effluent is discharged into the Tagus River, which flows into the Atlantic Ocean near Lisbon. The estuary supports diverse aquatic life, including fish and bird species, and is an important migratory corridor. Proper treatment at Barreiro_Moita helps maintain water quality in this ecologically significant area, supporting both environmental health and human uses such as recreation and fishing.
Environmental context
The plant discharges into the Tagus River, which flows into the Tagus estuary and then the Atlantic Ocean. The estuary is a highly productive ecosystem that supports diverse aquatic life, including fish, crustaceans, and migratory birds. Nutrient loading from wastewater can lead to eutrophication, so effective treatment is essential to maintain ecological balance and water quality in this coastal environment.
Frequently asked questions
The Barreiro_Moita wastewater treatment plant is located in Montijo, Setúbal District, Portugal. Its address is Montijo e Afonsoeiro, Montijo, Setúbal, 2836-908, Portugal.
The treated wastewater from Barreiro_Moita is discharged into the Tagus River, which flows into the Tagus estuary and ultimately the Atlantic Ocean. The plant's coastal proximity means treated effluent must meet strict quality standards to protect the marine environment.
Barreiro_Moita protects the Tagus River and its estuary by treating wastewater before discharge. The Tagus is one of the longest rivers in the Iberian Peninsula, and its estuary is a vital ecological zone for fish, birds, and other wildlife.
As a plant serving over 150,000 people, Barreiro_Moita is classified as a large agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC). This directive mandates secondary treatment as a minimum, with tertiary treatment required in sensitive areas like the Tagus estuary to reduce nutrients and protect water quality.
For a plant serving 170,000 people in Portugal, typical treatment includes secondary biological treatment (activated sludge or similar) and often tertiary treatment such as nutrient removal or disinfection, especially when discharging into sensitive coastal or estuarine waters like the Tagus estuary.
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