Progress on competition between PAOs and GAOs in enhanced biological phosphorus removal.
With high efficient phosphorus removal,the enhanced biological phosphorus removal (EBPR)process has been widely applied in many wastewater treatment plants. Though EBPR process is indeed capable of efficient phosphorus removal,disturbances and insufficient phosphorus removal are observed at large scale plants. In terms of solving the problem main microorganisms in the process were studied. The affecting factors such as carbon source,pH value and temperature were discussed,especially competition between polyphosphate accumulating organism(PAOs)and glycogen accumulating organism (GAOs). Potential areas in future studies were also proposed.