| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide membrane-separation-type activated sludge process equipment which carries out circulation of an aerobic tank, without reduction of the effective membrane separation area, with a uniform and stable flow rate of to-be-processed water required for washing of the surface of the membrane and a method for the equipment. <P>SOLUTION: The membrane-separation-type activated sludge process equipment 10 includes an aerobic tank 12 treating target water 16 biologically and aerobically by using activated sludge 18 held within the tank, an air diffusion means 20 of supplying air required for the aerobic treatment and a membrane separation means 30 immersed in the aerobic tank 12. In the aerobic tank 12, there is formed a separation wall 50 dividing the membrane separation means 30 from the air diffusion means 20 vertically. The separation wall 50 has an upper opening 52 through which an ascending flow of the target water 16 produced in air diffusion by the air diffusion means 20 moves laterally under the water surface and flows into the side of the membrane separation means 30 and a lower opening 54 through which the ascending flow incoming from the upper opening 52 passes through the separation membranes of the membrane separation means 30 as a descending flow and flows out to the side of the air diffusion means 20. <P>COPYRIGHT: (C)2012,JPO&INPIT |
