METHOD AND APPARATUS FOR TREATING FRESH WATER OR SALT WATER

摘要

PROBLEM TO BE SOLVED: To provide a fresh water or salt water treatment method capable of performing the sterilization of fresh water or salt water with high efficiency while continuing membrane separation treatment and reducing a rise in the difference pressure between modules even if continuous operation is performed over a long period of time, and a treatment apparatus therefor. SOLUTION: This fresh water or salt water treatment method has a usual treatment process for supplying fresh water or salt water to a separation membrane as raw water to subject the same to membrane separation treatment and a sterilization treatment process for adding salts or a salts-containing liquid to the raw water to apply highly salt concentrating treatment and acidification treatment to the raw water and supplying the treated raw water to the separation membrane to subject the same to membrane separation treatment while performing sterilization treatment. COPYRIGHT: (C)2005,JPO&NCIPI