| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water treatment system which, when the water quality of a permeate in a later-stage RO membrane module is good, can suppress power consumption of a first pump while maintaining the water amount and water quality.SOLUTION: A water treatment system includes a feed water tank 2, a first reverse osmosis membrane module 5, a feed water line L2, a first pump 3, a first inverter 4, a second reverse osmosis membrane module 8, a first permeate line L3, an auxiliary feed water line L4, a second pump 6, a second inverter 7, water quality detection means 15, first flow rate detection means 13, second flow rate detection means 14, a first control part 11 which outputs a command signal corresponding to a first target flow rate value to the first inverter 4, and when a difference between a reference value and a detection value of the water quality detection means 15 exceeds a specified value, reduces the first target flow rate value, and a second control part 12 which outputs a command signal corresponding to a second target flow rate value to the second inverter 7. When the first target flow rate value is reduced, feed water W1 is fed from the auxiliary feed water line L4 to the first permeate line L3.</p> |
