| 摘要 |
PROBLEM TO BE SOLVED: To provide a water treatment system which is capable of reducing the maintenance cost by suppressing uniform deterioration of membrane performance of a reverse osmosis membrane module in case of abnormality in water quality of water supply.SOLUTION: A water treatment system includes: a plurality of membrane separation devices U1-U4; a water permeation coefficient calculation means 101 to calculate the water permeation coefficient of a reverse osmosis membrane module for every membrane separation device; a water quality attribute measuring means which measures water quality attributes of water supply W1; a priority setting means 101 which sets the priority to operate the membrane separation devices so that the membrane separation device having a larger degree of progress and having a reverse osmosis membrane module is set higher for the priority to operate the membrane separation devices in comparison with the degree of progress in the water permeation performance change of the reverse osmosis membrane module based on the water permeation coefficient calculated from every membrane separation device, when the measured water quality of the water quality attribute measuring means exceeds allowed water quality; and an operation control means 102 which outputs the operation instruction signal into the membrane separation device to give priority of operation in consideration with the volume of water of the permeated water consumed at a demanded point and in accordance with the priority set by the priority setting means 101. |
