Experimental Research on the Application of the Aerobic Granular Sludge in the Municipal Sewage Treatment

Using conventional activated sludge of breweries as the vicinal sludge,stable aerobic granular sludge in sequencing batch reactor was cultured successfully,and it was applied to municipal sewage treatment.At room temperature,COD and NH+4-N removal rate of aerobic granular sludge was tested,and the average remoualrate reached 80% and 82%,respectively.The concentration of aerobic granular sludge ranged from 2 700～3 600 mg·L-1,higher than that of the conventional activated sludge.The Sludge Volumetric Index of granular sludge ranged from 30 that of 50 mL·g-1 and favorable settling ability is shown.The average particle size of granular sludge ranged from 0.5～1.2 mm at all times.