| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water treatment method and a water treatment system which can most efficiently perform decomposition treatment of an organic matter in water to be treated, and treatment for reducing a trihalomethane generating capacity, reduce the injection of useless ozone gas without increasing running costs of the system, and suppress the generation of by-products, such as bromate ion, which cannot be removed even by activated carbon treatment and chlorine treatment at the subsequent stage. <P>SOLUTION: The concentration of dissolved organic carbon in raw water is measured by an organic carbon analyzer 10 before introduction of the raw water into an ozone treatment pond 4, an ozone injection controller 11 determines the amount of ozone injected into the ozone treatment pond 4 from an ozone absorption rate corresponding to the measured dissolved organic carbon concentration, from a predetermined relation between a dissolved organic carbon concentration and an ozone absorption rate. Thereby a minimum ozone injection rate conformable to water quality of the raw water and required for the decomposition treatment of the organic matter and the treatment for reducing the trihalomethane generating capacity can be obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
