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Received: 2005-08-08

Revision Accepted: 2005-11-30

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Journal of Zhejiang University SCIENCE B 2006 Vol.7 No.3 P.180~185

http://doi.org/10.1631/jzus.2006.B0180


Influence of temperature fluctuation on thermophilic anaerobic digestion of municipal organic solid waste


Author(s):  Wu Man-Chang, Sun Ke-Wei, Zhang Yong

Affiliation(s):  School of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; more

Corresponding email(s):   wyuc@sina.com

Key Words:  Temperature fluctuation, Low temperature duration, Thermophilic anaerobic digestion, Municipal organic solid waste


Wu Man-Chang, Sun Ke-Wei, Zhang Yong. Influence of temperature fluctuation on thermophilic anaerobic digestion of municipal organic solid waste[J]. Journal of Zhejiang University Science B, 2006, 7(3): 180~185.

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author="Wu Man-Chang, Sun Ke-Wei, Zhang Yong",
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%T Influence of temperature fluctuation on thermophilic anaerobic digestion of municipal organic solid waste
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%A Zhang Yong
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%@ 1673-1581
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.B0180

TY - JOUR
T1 - Influence of temperature fluctuation on thermophilic anaerobic digestion of municipal organic solid waste
A1 - Wu Man-Chang
A1 - Sun Ke-Wei
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J0 - Journal of Zhejiang University Science B
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SP - 180
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2006.B0180


Abstract: 
A laboratory-scale experiment was carried out to assess the influence of temperature fluctuation on thermophilic anaerobic digestion of municipal organic solid waste (MOSW). Heating failure was simulated by decreasing temperature suddenly from 55 °C to 20 °C suddenly; 2 h time is needed for temperature decrease and recovery. Under the conditions of 8.0 g/(L·d) and 15 d respectively for MOSW load and retention time, following results were noted: (1) biogas production almost stopped and VFA (volatile fatty acid) accumulated rapidly, accompanied by pH decrease; (2) with low temperature (20 °C) duration of 1, 5, 12 and 24 h, it took 3, 11, 56 and 72 h for the thermophilic anaerobic digestion system to reproduce methane after temperature fluctuation; (3) the longer the low temperature interval lasted, the more the methanogenic bacteria would decay; hydrolysis, acidification and methanogenesis were all influenced by temperature fluctuation; (4) the thermophilic microorganisms were highly resilient to temperature fluctuation.

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Reference

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