METHOD FOR PREVENTING SLUDGE BULKING IN SETTLING TANK

摘要

PURPOSE: Provided is a method for preventing sludge bulking of settling tank, which is characterized in that settling characteristics of activated sludge is improved by adding coagulants. CONSTITUTION: The method comprises the steps of injecting cationic coagulant between an aeration tank and a settling tank for improving settling characteristics; injecting anionic coagulant as assistant coagulant.