| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a filtrate recovery device of a solid-liquid mixed/processed liquid capable of completely suspending the flow of a liquid concurrently with the shutdown of a suction pump, as if the suction pump were installed at a position below the liquid level of an aeration tank and obtaining a cleaning effect as expected by air scrubbing. <P>SOLUTION: A membrane filtering unit 5 having an air-diffusion device 15 is dipped downward of a membrane separation module 9 inside the aeration tank 4, the solid-liquid mixed/processed liquid is solid-liquid separated by the module concurrently with air-diffusion by the diffuser 15, a filtrate is suction-recovered from the membrane separation module 9 through a suction tube of the filtrate rising upward of the liquid level of a gas-liquid mixed/processed liquid in the tank 4. The suction pump Pv connected to the suction tube is disposed outside the tank 4 and downward of the liquid level, a waste liquid tube path 26 connected to a delivery outlet of the suction pump Pv is extended by rising upward and being bent downward and has a discharge outlet that is positioned downward of the liquid level. Further, a suction/discharge means 27 is disposed at the top section of the recovery tube path. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
