This study demonstrated that temperature is an important factor in determining the outcome of competition between polyphosphate-accumulating organisms (PAOs) and glycogen-accumulating non-poly-P organisms (GAOs) and the resultant stability of enhanced biological phosphorus removal (EBPR) systems. At 20°C and a 10-day sludge age, PAOs were dominant in the anaerobic/aerobic (A/O) SBR, however, at 30°C and a 10-day sludge age, GAOs were dominant in the A/O SBR. For kinetic batch studies, the anaerobic specific acetate uptake rate of GAO-dominated sludge (1.34 × 10−3 mg C/mg VSS·minute) was higher than the rate of PAO-dominated sludge (0.89 × 10−3 mg C/mg VSS·minute) at 30°C, leading to the eventual failure of EBPR processes at high temperatures.
Competition between polyphosphate- and glycogen-accumulating organisms in biological phosphorus removal systems – effect of temperature
L.-M. Whang, J.K. Park; Competition between polyphosphate- and glycogen-accumulating organisms in biological phosphorus removal systems – effect of temperature. Water Sci Technol 1 July 2002; 46 (1-2): 191–194. doi: https://doi.org/10.2166/wst.2002.0476
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