| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that there is hardly found a technique to remove an organic foreign object and to purify the waste water despite a technique conventionally found to be effective in its own way in treating an oil content or a floating foreign object etc. among foreign objects in polluted waste water. SOLUTION: A fluid mixture of water and air containing much of oxygen is blown into the polluted waste water 201, thereby dissolving the oxygen into the polluted waste water 201 and simultaneously to produce minute bubbles 10z containing much of the oxygen in the polluted waste water. Then the foreign object in the polluted waste water 201 adheres to the surface of the minute bubble 10z containing much of the oxygen and rises to the waste water surface as a floating foreign object 202. Thus the foreign object is removed from the polluted waste water 101 containing organic matter which has scarcely been treated conventionally. COPYRIGHT: (C)2008,JPO&INPIT
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