Water company's shift away from chlorine

Britain's largest water company, Thames Water, has installed an on-site electrochlorination system at one of its major London treatment works. The technology is becoming increasingly popular in the water industry and experts expect it to cut chlorine sales for water disinfection by half.

Electrochlorination uses electrolysis of brine to produce a hypochlorite solution which can be used instead of chlorine gas for drinking water disinfection. The technology's main advantage is that it avoids the need to store large quantities of chlorine and the hazards this entails.

Thames Water invested almost £1 million in the electrochlorination plant at Walton, its major works in south London. The unit was supplied by Wallace &a

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