DEVICE FOR TREATING MEMBRANE-FILTRATION WASTE WATER AND ITS OPERATION

摘要

PROBLEM TO BE SOLVED: To decrease the amt. of sludge depositing on the inside of the hollow- fiber membrane of a membrane module to be used in a membrane-filtration waste water treating device. SOLUTION: The waste water to be treated is membrane-filtered by the membrane module of the membrane-filtration waste water treating device. In this case a pipeline is provided to the device to supply the waste water alternately to the feed ports E1 and E2 furnished on both ends of the membrane module 4, valves 14 to 17 are switched to change the flow direction of the waste water flowing in the module 4, and the adherence and deposition of sludge is suppressed.