| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for treating waste washing water in biological membrane filtration, by which high-frequency washing of a biological membrane filtration tank is made unnecessary, the water recovery rate is made high, the water quality and treatment performance is not deteriorated and the biological membrane filtration method is made possible even when SS or BOD in original water is high. <P>SOLUTION: This method for treating waste washing water in the biological membrane filtration in which the water to be treated is introduced into the biological membrane filtration tank packed with a filter medium, treated biologically and filtered, comprises a step of introducing the waste washing water in the biological membrane filtration tank into a filtration module-immersed filtration/separation tank through a waste washing water tank or into another waste washing water tank where the filtration module is immersed directly, a step of performing dynamic filtration in the filtration/separation tank or the waste washing water tank and a step of affording a filtrate from the filtration module by water head pressure. <P>COPYRIGHT: (C)2004,JPO</p> |
