| 摘要 |
PROBLEM TO BE SOLVED: To provide a water treatment system capable of obtaining a high water-saving effect by maintaining a recovery rate at an optimal state in accordance with water quality fluctuation of feed water.SOLUTION: A water treatment system according to the present invention is a water treatment system applied to wastewater treatment and water purification treatment and comprises: a reverse osmosis membrane device that separates feed water into a permeate and a concentrate; a feed water line that supplies the feed water to the reverse osmosis membrane device; a chemical adding device that is arranged upstream of the reverse osmosis membrane device to add a chemical to the feed water; an electrical conductivity measuring part that is arranged upstream of the chemical adding device to measure the electrical conductivity of the feed water before addition of the chemical; and a control part that controls a recovery rate in the reverse osmosis membrane device on the basis of the electrical conductivity measured by the electrical conductivity measuring part.SELECTED DRAWING: Figure 1 |
