Comparative performance between intermittently cyclic activated sludge-membrane bioreactor and anoxic/aerobic-membrane bioreactor.
A process of intermittently cyclic activated sludge-membrane bioreactor (ICAS-MBR) was developed to enhance the performance of biological phosphorus removal (EBPR), which was constructed under sequencing anoxic/anaerobic/aerobic condition. The performance between ICAS-MBR and conventional anoxic/aerobic-membrane bioreactor (A/O-MBR) in terms of phosphorus removal, nitrification performance and microbial aspects were investigated in this study. The experimental results indicated that the phosphorus removal efficiency in ICAS-MBR process increased from 65% to 83% when compared with A/O-MBR. It was also found that the COD removal efficiencies of the two processes were over 94%, and NH(4)(+)-N and TN average removal efficiencies were 96% and 69% in ICAS-MBR and 96% and 78% in A/O-MBR, respectively. Furthermore, micrographs observation obtained confirmed the succession and diversification of microorganisms in the two systems followed a similar regularity.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, PR China.
Yu-Lan
YL
Wang
Shui-Li
SL
Yu
Wen-Xin
WX
Shi
Rui-Ling
RL
Bao
Qing
Q
Zhao
Xing-Tao
XT
Zuo
D000332:Aerobiosis; D000693:Anaerobiosis; D001419:Bacteria / Q000302:isolation & purification; D019149:Bioreactors / Q000382:microbiology*; D008567:Membranes, Artificial; D009391:Nephelometry and Turbidimetry; D009584:Nitrogen / Q000302:isolation & purification; D010100:Oxygen / Q000302:isolation & purification; D010758:Phosphorus / Q000302:isolation & purification; D011312:Pressure; D012722:Sewage / Q000382:microbiology*; D014865:Waste Disposal, Fluid
D008567:Membranes, Artificial; D012722:Sewage; D010758:Phosphorus; D009584:Nitrogen; D010100:Oxygen