METHOD FOR CLEANING FILTRATION MEMBRANE

摘要

Disclosed is a method for cleaning a filtration membrane during when filtration is carried out, which comprises: an alkali treatment step in which an alkaline agent (24) is supplied to raw water (11) for a predetermined period of time and then the raw water (11), to which the alkaline agent (24) has been supplied, is passed through a filtration membrane (15); and a neutralization step in which an acidic agent (26) is supplied, after the alkali treatment step, to the raw water (11) for a predetermined period of time and then the raw water (11), to which the acidic agent (26) has been supplied, is passed through the filtration membrane (15).