Competition between polyphosphate- and glycogen-accumulating organisms in biological phosphorus removal systems--effect of temperature.
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 degrees C and a 10-day sludge age, PAOs were dominant in the anaerobic/aerobic (A/O) SBR, however, at 30 degrees 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 x 10(-3) mg C/mg VSS x minute) was higher than the rate of PAO-dominated sludge (0.89 x 10(-3) mg C/mg VSS x minute) at 30 degrees C, leading to the eventual failure of EBPR processes at high temperatures.
Whang
L M
LM
Department of Civil & Environmental Engineering, University of Wisconsin-Madison, 53706 USA.
Park
J K
JK
D019149:Bioreactors; D006003:Glycogen / Q000378:metabolism* / Q000493:pharmacokinetics; D007700:Kinetics; D011122:Polyphosphates / Q000378:metabolism* / Q000493:pharmacokinetics; D011157:Population Dynamics; D013696:Temperature; D014865:Waste Disposal, Fluid
D011122:Polyphosphates; D006003:Glycogen