| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a membrane washing method in a membrane separation activated sludge method for effectively scratching off depositions on the surface of a membrane used in the membrane separation activated sludge method and for preventing the reduction of a membrane separation rate. <P>SOLUTION: In the membrane washing method, membrane washing particles 4 in which each surface is hydrophilized, and has ruggedness of≥100μm are charged inside a bioreaction tank 1, are made to flow by the air lift effect of bubbles jetted from a diffuser 3, and are made to scratch off depositions on the surface of a separation membrane element 2. In the membrane washing method, membrane washing particles 4 of non-pores or independent pores are used. In the membrane washing method, the membrane washing particles 4 in which antibacterial components of copper, silver or the like are carried on each surface or inside are used. In the membrane washing method, the membrane washing particles 4 are periodically placed in an anaerobic condition, and microorganisms on the surfaces of the particles are peeled. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
