Abstract:

Principles for enhanced biological phosphorus removal and metabolism mechanism of polyphosphate accumulating organisms（PAOs）& glycogen accumulating organisms（GAOs）are introduced in this paper. The effects of different carbon sources on competitions between GAOs and PAOs are discussed，and changes of phosphate removal efficiency and the microbial community are analyzed based on the recent researches. Furthermore，some measures are put forward to resolve the problem of  PAOs-GAOs competition.