Publication: Biogas production from two-stage anaerobic digestion of Jatropha curcas seed cake
Issued Date
2012-11-01
Resource Type
ISSN
15567230
15567036
15567036
Other identifier(s)
2-s2.0-84867065271
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Mahidol University
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SCOPUS
Bibliographic Citation
Energy Sources, Part A: Recovery, Utilization and Environmental Effects. Vol.34, No.22 (2012), 2048-2056
Suggested Citation
N. Sinbuathong, P. Sirirote, B. Sillapacharoenkul, J. Munakata-Marr, S. Chulalaksananukul Biogas production from two-stage anaerobic digestion of Jatropha curcas seed cake. Energy Sources, Part A: Recovery, Utilization and Environmental Effects. Vol.34, No.22 (2012), 2048-2056. doi:10.1080/15567036.2012.664947 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/14105
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Title
Biogas production from two-stage anaerobic digestion of Jatropha curcas seed cake
Abstract
Digestion of Jatropha curcas seed cake was investigated in two-stage (acidogenic and methanogenic) anaerobic bioreactors without pH adjustment. Acidogenic reactors were fed once daily with a slurry of 1:10 Jatropha curcas seed cake:water containing approximately 100 g of chemical oxygen demand/l. Organic loading rates were 2.5, 3.3, 5, 10, and 20 kg chemical oxygen demand/m 3 .day, which corresponded to hydraulic retention times of 40, 30, 20, 10, and 5 days, respectively, for each reactor stage. The maximum methane yield (340 l at STP/kg of chemical oxygen demand degraded) was observed at an organic loading rate of 3.3 kg chemical oxygen demand/m 3 .day (hydraulic retention times = 30 days for each stage). At this organic loading rate and hydraulic retention time, the chemical oxygen demand degradation efficiency was 65%. The average pH in the acidogenic and methanogenic reactors was 4.9 and 7.4, respectively. This study demonstrates high methane yield and degradation extent of Jatropha curcas seed cake in a two-stage anaerobic process without chemical addition for pH adjustment. © 2012 Copyright Taylor and Francis Group, LLC.