| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sewage purification facility that can reduce manufacturing cost by eliminating the necessity of a control device for controlling cleaning operation. <P>SOLUTION: The sewage purification facility includes: an aerobic treatment tank that aerobically treats water to be treated; a carrier filter tank B that filters the water to be treated, treated in the aerobic treatment tank; an air lift pump P that sucks a carrier 23, filled in the carrier filter tank B and having a specific gravity larger than that of water, together with the water to be treated from the tank bottom to a pumping passage 25 to return the carrier 23 to the upper part of the carrier filter tank B; a transfer part 37 that transfers a part of the water to be treated, discharged from the pumping passage 25, to a tank E1 other than the aerobic treatment tank and other than the carrier filter tank B; and a circulation passage 40 that can circulates the water to be treated between the aerobic treatment tank and the carrier filter tank B. <P>COPYRIGHT: (C)2013,JPO&INPIT |
