| 摘要 |
PROBLEM TO BE SOLVED: To further improve the generation efficiency of a hydroxy radical in accelerated oxidation treatment combining hydrogen peroxide with ozone treatment in comparison with conventional ones. SOLUTION: Hydrogen peroxide is injected together with ozone by an ejector 4 for injecting the ozone to water to be treated. When hydrogen peroxide is injected into the upstream side of the ejector 4, the injected hydrogen peroxide reacts with organic substances to be consumed before it reaches the ejector 4, thereby a mixing ratio of hydrogen peroxide to ozone becomes inaccurate. When hydrogen peroxide is injected into the downstream side of the ejector 4, ozone injected before the hydrogen peroxide reacts with the organic substances to be consumed before it reacts with the hydrogen peroxide, thereby the above mixing ratio becomes inaccurate. As hydrogen peroxide is injected together with ozone by the ejector 4, their independent consumption can be avoided. As a result, the above mixing ratio becomes accurate and the proper mixing ratio can be obtained. Both hydrogen peroxide and ozone are vigorously agitated in the ejector 4. Thereby hydroxyl radicals are generated efficiently. COPYRIGHT: (C)2005,JPO&NCIPI
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