METHOD FOR PRODUCING SUGAR SOLUTION

摘要

A method for producing a sugar solution by filtering a cellulose-derived sugar solution through one or more separation membranes selected from an ultrafiltration membrane, a nanofiltration membrane, and a reverse-osmosis membrane, wherein separation membranes which are dirty as a result of the filtration are cleaned using a cleaning fluid containing an acidic substance and an aromatic compound. As a result, it is possible to effectively clean dirty separation membranes.