| 摘要 |
<P>PROBLEM TO BE SOLVED: To efficiently recover suspended matters removed by flotation separation without providing a device requiring a large power such as a liquid pump nor a dynamic machine apparatus such as a sweeping mechanism. <P>SOLUTION: A RO retentate that contains ozone microbubbles 29 is supplied in a lower part of a contact tank 5 of an airtight structure to ozonate the retentate and to float and separate the suspended matters 32. A valve 10, a valve 14, and a valve 21 are closed to pump up the treated water to a washing liquid tank 15 installed in a height by a supply pressure of the RO retentate, and the valve 14, the valve 16, and the valve 21 are opened to sprinkle water to the contact tank 5 wall surfaces from a liquid header 24. The suspended matters 32 are extruded toward a recovery device 23 by the flow of washing water toward the suspended matters 32 from a wall surface, and recovered and removed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
