| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a filtering and separating method for sewage water treatment easy in forming a uniform and dynamic filter layer and capable of obtaining a high filter flux at the time when sewage water, etc., are filtered by using a water permeable filter body and to provide water device therefor. SOLUTION: In the filtering and separating method of the sewage water treatment and its device for obtaining filtered water by immersing the water- permeable filter body in a biological reaction tank through a partition plate and subjecting the sewage water to the dynamic filter, an activated sludge solution is circulated to the water permeable filter body so that the average flow velocity on the surface of the water permeable filter body at normal operation may be not lower than sludge sedimentation velocity to lower than 0.05 m/s. The aeration air flow of the biological reaction tank is varied preferably to control the flow velocity on the surface of the water permeable filter.</p> |
