PARIS, France, March 10, 2008 -- A large-scale ultraviolet (UV) disinfection system from Dutch UV specialist Berson is treating drinking water for around 650,000 people in Paris, France. Located to the north of the city in the suburb of Méry-sur-Oise, the system is one of the largest European installations of Berson's InLine range of UV equipment. Five InLine 1500 units are installed in parallel to provide disinfected drinking water at the rate of 7500 m³/h.
Owned by SEDIF (the Syndicat des Eaux d'Île-de-France) and operated by the Compagnie Générale des Eaux, the plant uses water from the nearby River Oise. Following pre-treatment and nanofiltration, the water is pumped through the UV units which kill any remaining microorganisms. The treated drinking water is supplied to 37 districts in the northern suburbs of Paris, with daily production totalling 340,000 m³.
The InLine units feature Berson's innovative MultiWave medium pressure UV lamps, which are orientated perpendicular to the water flow to achieve optimum UV exposure. Unlike conventional UV lamps, MultiWave lamps produce a broad spectrum of wavelengths which act on the whole micro-organism, rather than its DNA alone, ensuring permanent deactivation.
An integral sensor monitors UV light intensity in each treatment chamber, while a custom-built control panel provides communication between the UV units and the plant control room. Also incorporated in each UV unit is an automatic wiping mechanism which cleans the quartz sleeves surrounding the lamps and keeps them free of water-borne deposits.
Berson, along with fellow UV companies Hanovia Limited in the UK and Aquionics Inc in the USA, is part of the Fluid Technology Division of Halma p.l.c.
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