Analysis of microbiology mechanism of aerobic granular sludge form

The phenomenon of microbe self-immobilization in the granulation process of aerobic sludge was elaborated.The analysis showed that,extracellular polymers of microorganism granule could promote intercellular polymerization which played a significant role on formation of granular sludge and maintenance of its stability.The increase of the cell surface hydrophobicity was an important drive-force of microbe self-immobilization,the falling of the sludge surface charges benefited the access and accumulation of sludge granules,and formed a stable granular structure.It was considered that,the cultivation process of aerobic granular sludge was a complete process which form the microecological system with the action of physical,chemical and biological.