This paper utilizes self-made SBR reactor to culture aerobic granular sludge(AGS).It uses regulating method of gradually improving influent loads under the condition of anaerobic-aerobic alternative operation.According to the characteristics of AGS,the paper choose five factors:COD,C/N,anaerobic time,hydraulic retention time and aeration,explore the influence degree of the five factors with orthogonal test to seek the optimum cultural condition of AGS.According to the experiment,the significant degree of in...