2023-07-03 13:00:46
The Baix Llobregat plant in Barcelona treats 300,000 m3 of water every day. olivier corsan/PHOTOPQR/LE PARISIEN/MAXPPP
DECRYPTION – On the other side of the Pyrenees, Veolia is refining know-how which will probably be useful in France.
The plane rumbles past just above the facility. The sky is blue. The temperature exceeds 30°C. At the entrance to the site, a sign reads “Aguas de Barcelona”, for water from Barcelona. A slight smell of decomposing matter hangs at the entrance to the site. Which is logical: we are on the huge wastewater treatment plant of the city of Barcelona, between the airport and the capital of Catalonia.
The site extends over more than a kilometer in length. The water passes first through twelve “biological reactors”, which allow the biological degradation of wastewater through the injection of air, then through fourteen large circular pools to separate the biomass. In all, 300,000 m3 of water are treated every day, corresponding to an agglomeration of 2.2 million inhabitants.
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In France, the water would then be sent to the sea, or to a river for an inland station. But not at the Baix Llobregat station in Barcelona. The water will indeed undergo…
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