METHOD FOR CHEMICAL GRANULATION OF ANAEROBIC AMMONIUM OXIDIZING BACTERIA

摘要

A method for chemically granulating suspended anaerobic ammonium oxidizing bacteria is provided to efficiently and stably operate a nitrogen removing system using the anaerobic ammonium oxidizing bacteria by stably cultivating and maintaining the bacteria even in a state that a sufficient amount of anaerobic ammonium oxidizing bacteria is not secured. A method for chemical granulation of anaerobic ammonium oxidizing bacteria comprises the steps of: cultivating the anaerobic ammonium oxidizing bacteria in a culture vessel; mixing the cultivated anaerobic ammonium oxidizing bacteria with anaerobic digestion sludge and injecting a cationic or anionic polymer into the sludge at a high speed stirring condition of 400 to 500 rpm to granulate the sludge; and injecting a silica sol into the mixed solution at a low speed stirring condition of 100 to 200 rpm to stabilize the granulated sludge.