Santa Clara Valley Water District Switches to Ozone

Jan. 17, 2003
PCI-WEDECO Environmental Technologies 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. The total value of the contract is approximately $3.5 million.

Under the contract, each water treatment plant will be supplied with PCI-WEDECO EFFIZONÒ 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 100 million gallons per day (MGD) of water. The Peniticia WTP will treat up to 42 MGD of water.

Camp Dresser and McKee (CDM), Walnut Creek, California, working for the District, incorporated the new ozone systems into the process as part of plant upgrades at each facility.

Instead of relying on chlorination as its primary disinfection method, the District will switch to ozone. Ozone is capable of oxidizing naturally occurring constituents that can adversely affect water quality in the form of color, organics/inorganics, tastes and odor. Ozone is also an extremely effective disinfectant for controlling harmful bacteria, viruses and protozoa including Cryptosporidium and Giardia, and ensures safe drinking water for all consumers. A major objective as well for Santa Clara is to reduce the use of chlorine and the by-products produced from it, specifically Trihalomethanes (THMs) that have been linked to reproductive health problems.

Rinconada, Santa Teresa and Penitencia WTP’s are located in the foothills around the Santa Clara Valley so that the pull of gravity helps to deliver the treated water to the end users. 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. These three plants currently can produce as many as 210 million gallons of water a day for nearly 1.6 million area residents. Following the upgrades they will be able to produce up to 242 MGD.

Source: PCI-Wedeco