METHOD FOR IMPROVING INHIBITION PERFORMANCE OF SEMIPERMEABLE MEMBRANE, SEMIPERMEABLE MEMBRANE, AND SEMIPERMEABLE MEMBRANE WATER PRODUCTION DEVICE

摘要

Disclosed is a method for improving the inhibition performance of a semipermeable membrane by supplying, in a pressurized manner, a liquid including an inhibition performance improving agent to the primary side of the semipermeable membrane and bringing the liquid into contact with the membrane surface, the method comprising a step of changing the pressure acting on the membrane surface and/or the permeation flow rate from that during normal treatment and maintaining the same by: changing the pressure at a fluctuation velocity of 0.05 MPa/s or higher at least once during supply; or changing the osmotic pressure of the liquid including the inhibition performance improving agent; or changing the supply flow rate to the semipermeable membrane.