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1999 - Méry-sur-Oise

Nanofiltration

1999 - Installation of nanofiltration at the Méry-sur-Oise water treatment plant for the Greater Paris water authority - Syndicat des Eaux d'Ile-de-France (SEDIF)

Veolia Water chooses a major technological breakthrough - nanofiltration - in order to supply the Greater Paris area with water of unparalleled quality. This highly sophisticated membrane system is able to filter out any undesirable colloidal substances whose presence in raw water is continually on the increase. It therefore reduces the amount of products used in the treatment process (140,000 cubic meters a day).

The water treatment plant at Méry-sur-Oise provides the Parisian suburbs (4 million inhabitants) with high quality water thanks to a membrane process developed by researchers at Veolia Water.

Nanofiltration process at the water treatment plant at Mery-sur-Oise (©SEDIF).

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This process, first used in the medical world, has been adapted by researchers at Veolia Water to allow for its use with large volumes of water and for the large scale production of drinking water at prices suited to market demand. Nanofiltration has been used since 2002 in Coliban, Australia, to treat up to 126 million liters of water a day.

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