Baix Llobregat WWTP

Barcelona, Spain

Wastewater

Project type

420.000 m³/day

Daily capacity

The Baix Llobregat Wastewater Treatment Plant, with a treatment capacity of 420,000 m³ per day, is one of the largest wastewater treatment facilities in Europe.
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The project involved the design and construction of the water treatment line for a facility serving 2.27 million population equivalent, supporting wastewater management across the Barcelona metropolitan area. Beyond treatment capacity, the plant plays a significant environmental role by helping maintain ecological flows in the Llobregat River, supporting agricultural irrigation and contributing to the conservation of wetlands within the delta area

Project data

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14.83 million ft³/day treatmen capacity

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Serves 2,275,000 population

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Pre-treatment with 8 lines and a total flow rate of 512.1 ft³ / s

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12 primary clarifiers

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12 circular secondary decanters

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1.9-mile submarine discharge outlet

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