Membrane treatment apparatus, drinking water production apparatus, membrane treatment method, and drinking water production method

摘要

PROBLEM TO BE SOLVED: To provide a membrane treatment apparatus capable of suppressing scale generation on a reverse osmosis membrane without adding a scale inhibitor, a slime inhibitor, or the like to raw water in treatment of filtering the raw water with a membrane separator having the reverse osmosis membrane.SOLUTION: A membrane treatment apparatus 1 comprises a membrane separator 12 having a reverse osmosis membrane for separating raw water into permeated water and concentrated water, a raw water supply line 16 for supplying the raw water to the membrane separator 12, a permeated water line 18 for discharging the permeated water from the membrane separator 12, a permeated water tank 14 for storing the permeated water flowing through the permeated water line 18, a concentrated water line 20 for discharging the concentrated water from the membrane separator 12, a treated water supply line 22 for supplying the permeated water in the permeated water tank 14 from the raw water supply side to the membrane separator 12 as treated water, and a control device 32 that starts the supply of the treated water to the membrane separator 12 through the treated water supply line 22 in a state where the supply of the treated water to the membrane separator 12 is stopped.SELECTED DRAWING: Figure 1