| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a drainage treatment apparatus and a method which can effectively scrape an adhesive off from the membrane surface used for a membrane-separation active sludge method, so that a flux lowering of the membrane filtration rate or an increase in a membrane differential-pressure can be prevented. <P>SOLUTION: The drainage treatment apparatus has a reaction tank 3 in which an active sludge is immersed and a drainage flows, a plurality of solid-liquid separation membranes 4 which are arranged in the vertical direction in the reaction tank 3, an aeration tube 6 which is arranged under the solid-liquid separation membranes 4, a sedimentary packing 8 having the specific gravity of 1.2 to 3.0 which is immersed in the reaction tank 3, an upward-flow generation mechanism 7 which is arranged under the aeration tube 6, and a control apparatus for controlling start-up and shut-down of the aeration tube 6 and the upward-flow generation mechanism 7. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
