| 摘要 |
PROBLEM TO BE SOLVED: To provide a water treatment system in which permeated water can be produced in an RO membrane module of a post stage by constant flow operation without using an intermediate tank.SOLUTION: A water treatment system 1 includes: a first membrane separation apparatus 4 which produces first permeated water W2 from a supply water W1; a first pump 2; pressure detection means 5 that outputs pressure of the first permeated water W2 produced in the first membrane separation apparatus 4 as a detected pressure value; a first control part 10 that drives the first pump 2 so that the detected pressure value output from the pressure detection means 5 may become a predetermined objective pressure value; a second membrane separation apparatus 8 which produces second permeated water W4 from the first permeated water W2 produced in the first membrane separation apparatus 4; a second pump 6; flow rate detection means 9 that outputs a flow rate of the second permeated water W4 produced in the second membrane separation apparatus 8 as a detected flow rate value; and a second control part 20 that drives the second pump 6 so that the detected flow rate value output from the flow rate detection means 9 may become a predetermined objective flow rate value. |
