| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a waste water pretreatment method and apparatus remarkably improving dissolved oxygen (DO) by pretreating waste water introduced into an aeration tank, and to make aeration treatment efficient to reduce a running cost required for the aeration treatment. <P>SOLUTION: Waste water treatment includes jetting waste water to cause cavitation and pretreating waste water with the erosion action, and then carrying out decomposition treatment with aerobic microorganisms in an aeration tank 3. In the waste water treatment, the waste water pretreatment method includes allowing waste water in pretreatment to pass through a water activating device 11 formed by winding a conductive wire 112 around a water passing pipe and then jetting activated waste water to cause cavitation and mixing concentrated oxygen at the same time. The waste water pretreatment apparatus is used for the method. <P>COPYRIGHT: (C)2012,JPO&INPIT |
