METHOD FOR THE TREATMENT WITH REVERSE OSMOSIS MEMBRANE

摘要

A method for treatment with a reverse osmosis membrane to reduce decrease in flux that occurs even under the conditions that water supplied to a reverse osmosis membrane treatment apparatus contains only a trace amount of iron and that the formation of scales of substances such as calcium and silica is prohibited. A method for performing a treatment with a reverse osmosis membrane to treat raw water containing iron at 1000 µg/L or less as total iron with a reverse osmosis membrane, including a step of adding a compound having a sulfo group to the raw water.