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Journal of Zhejiang University SCIENCE B 2010 Vol.11 No.2 P.79-86


Bed expansion behavior and sensitivity analysis for super-high-rate anaerobic bioreactor

Author(s):  Xiao-guang CHEN, Ping ZHENG, Jing CAI, Mahmood QAISAR

Affiliation(s):  Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China; more

Corresponding email(s):   pzheng@zju.edu.cn

Key Words:  Anaerobic bioreactor, Expansion behaviors, Bed expansion ratio, Fluidization state, Sensitivity analysis

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Xiao-guang CHEN, Ping ZHENG, Jing CAI, Mahmood QAISAR. Bed expansion behavior and sensitivity analysis for super-high-rate anaerobic bioreactor[J]. Journal of Zhejiang University Science B, 2010, 11(2): 79-86.

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author="Xiao-guang CHEN, Ping ZHENG, Jing CAI, Mahmood QAISAR",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

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%T Bed expansion behavior and sensitivity analysis for super-high-rate anaerobic bioreactor
%A Xiao-guang CHEN
%A Jing CAI
%A Mahmood QAISAR
%J Journal of Zhejiang University SCIENCE B
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B0900256

T1 - Bed expansion behavior and sensitivity analysis for super-high-rate anaerobic bioreactor
A1 - Xiao-guang CHEN
A1 - Ping ZHENG
A1 - Jing CAI
A1 - Mahmood QAISAR
J0 - Journal of Zhejiang University Science B
VL - 11
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SP - 79
EP - 86
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.B0900256

Bed expansion behavior and sensitivity analysis for super-high-rate anaerobic bioreactor (SAB) were performed based on bed expansion ratio (E), maximum bed sludge content (Vpmax), and maximum bed contact time between sludge and liquid (τmax). Bed expansion behavior models were established under bed unfluidization, fluidization, and transportation states. Under unfluidization state, E was 0, Vpmax was 4 867 ml, and τmax was 844–3 800 s. Under fluidization state, E, Vpmax, and τmax were 5.28%–255.69%, 1 368–4 559 ml, and 104–732 s, respectively. Under transportation state, washout of granular sludge occurred and destabilized the SAB. During stable running of SAB under fluidization state, E correlated positively with superficial gas and liquid velocities (ug and ul), while Vpmax and τmax correlated negatively. For E and Vpmax, the sensitivities of ug and ul were close to each other, while for τmax, the sensitivity of ul was greater than that of ug. The prediction from these models was a close match to the experimental data.

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