District to Switch From Chlorine to Ozone

PCI-Wedeco Environmental Technologies, Wedeco´s North American subsidiary, has been selected by the Santa Clara Valley Water District (San Jose, CA) to supply three integrated oxygen-ozone generation systems for the Santa Teresa, Rinconada and the Penitencia drinking water treatment plants in the Silicon Valley of California.

Under the contract, each water treatment plant will be supplied with Wedeco Effizon® ozone generators in addition to liquid oxygen storage and supply equipment, specialty ozone instrumentation and other associated components. The Santa Teresa and Rinconda plants will each treat up to 15.773 m3/h of water. The Peniticia WTP will treat up to 6.624 m3/h of water.

Instead of relying on chlorination as its primary disinfection method, the district will switch to ozone. A major objective for Santa Clara is to reduce the use of chlorine and the by-products produced from it, specifically Trihalomethanes (THMs), which have been linked to reproductive health problems.

The Santa Clara Valley Water District operates the three water treatment plants that clean and purify water imported from the Sacramento-San Joaquin River Delta or captured in one of their 10 reservoirs. After treatment the water is supplied to nearly a dozen water companies for distribution to the public.