| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide filtering device and method favorably fluidizing a fiber filter material in washing the fiber filter material with a suspended substance adhered and allowing stable treatment over a long period of time. <P>SOLUTION: In the filtering device 1 provided with an introduction pipe A of raw water to be treated on its upper part, a filter material layer 2 of a fiber filter material consisting of a short fiber lump within it, and a treated water collecting device 3, a supply pipe D for supplying air and a treated water flow-out pipe F risen from 3 at least higher than an upper part of 2 on its lower part, a gas liquid mixing nozzle 4 generating fine bubbles is disposed in 2, further a drain pipe H of filter material wash water may be disposed on its upper part, a filter material flow-out blocking porous member 5 having a mesh opening which is smaller than the shortest length of the diameter of the fiber filter material or the length of a straight part may be disposed in an exhaust port of H, and a wash water passing pipe E passing water with ascending flow may be disposed on its lower part. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
