Abstract
Enhanced biological phosphorus removal in the processes utilizing anaerobic/aerobic conditions is established by the increase of polyphosphate content in the activated sludge and the withdrawal of the sludge. For stable operation to achieve efficient phosphorus removal, better understanding of the microorganisms including polyphosphate-accumulating bacteria in activated sludge of these processes is required. However, physiology and ecology of bacteria which have an important role in these processes are still unclear. In this paper, the characteristics of important bacteria constructing phosphorus removal processes and the progress of microbial population analysis based on 16S rDNA sequences were introduced.
