DEPOSIT MONITORING DEVICE FOR WATER TREATMENT DEVICE, WATER TREATMENT DEVICE, OPERATING METHOD FOR SAME, AND WASHING METHOD FOR WATER TREATMENT DEVICE

摘要

A deposit monitoring device is provided with: a non-permeating water line (L11) for discharging non-permeating water (15) wherein dissolved components and dispersed components are concentrated from water (11) to be treated from a separation membrane device for obtaining permeating water by concentrating the dissolved components and dispersed components by means of a separation membrane; a first deposit detecting unit (24A) provided in a non-permeating water branch line (L12) branched from the non-permeating water line (L11), using part of the non-permeating water that has branched off as a detection liquid (15a), and having a first separation membrane (21A) for detection wherein detection liquid (15a) is separated into permeating water (22) for detection and non-permeating water (23) for detection; a deposition condition altering device for altering deposition conditions for the deposits in the first separation membrane (21A) for detection; and a flow rate measuring device for first separation liquid detection that measures the flow rate of one or both of the permeating water (22) for detection and the non-permeating water (23) for detection separated by the first separation membrane (21A) for detection.