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Ozonation

238 bytes added, 00:40, 23 May 2012
→‎Suitable conditions
==Suitable conditions==
Ozone is currently the next most widely used drinking water disinfectant after chlorine (there are some 1100 water treatment plants
using ozone worldwide), although its use is almost exclusively limited to the industrial countries with high-integrity piped water networks. Ozonation has become popular in North America partly because of its superiority over chlorination. It enhances the coagulation process despite its inherent weakness in leaving practically no residual in the distribution system.
Ozone However, ozone does not provide residual protection against recontamination in the distribution system. Therefore, its common use is to pre-treat the water source before chlorination in a municipal system, so that a smaller chlorine dose is required.
Although ozonation can effectively disinfect water, it is not suited for most developing country applications owing to its high cost, need for operational and maintenance infrastructure, and lack of residual protection in the distribution system.
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