METABOLISMS OF DIFFERENT BACTERIAL-POPULATIONS IN ENHANCED BIOLOGICAL PHOSPHATE REMOVAL PROCESSES

The characteristics of two major bacterial populations, phosphate accumulating organisms and ''G bacterium'', in the anaerobic-aerobic biological phosphate removal process are discussed with an emphasis on their metabolic functions. It is theoretically indicated that the system of the oxidation-reduction balance in the cell enables the anaerobic uptake of organic substrates and that this system is essential for the microorganisms to survive in anaerobic-aerobic processes.