METHOD FOR ENHANCING BLOCKING RATE OF PERMEABLE MEMBRANE, METHOD FOR TREATING PERMEABLE MEMBRANE, PERMEABLE MEMBRANE APPARATUS, AND PURE WATER PREPARATION APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a method for efficiently carrying out a blocking-rate enhancing treatment of a permeable membrane by swiftly and accurately carrying out the judgment on the enhanced blocking rate without suspending the blocking-rate enhancing treatment, whereby excessive consumption of a blocking-rate enhancing agent, an insufficient treatment and the like can be prevented.;SOLUTION: The blocking rate of a permeable membrane 2 is enhanced by feeding a blocking-rate enhancing agent to the primary side 3 of a module 1 via a supply path L1 of a liquid to be treated from a supply path L4 of the blocking-rate enhancing agent using a pump P2 and causing the blocking-rate enhancing agent to adhere to the permeable membrane 2. The concentrated liquid is taken out of a sampling path L7 and is introduced to a TOC measuring instrument 5 to measure the TOC concentration in the concentrated liquid. When the TOC concentration or the amount of the change of the TOC concentration in the concentrated liquid reaches a predetermined value, a controller 6 sends a signal to the pump P2 to control the amount of the blocking-rate enhancing agent being supplied either by decreasing it or by suspending the supply itself.;COPYRIGHT: (C)2008,JPO&INPIT