Effect of inoculum sources on the anaerobic digestion of rice straw

The aim of this study was to evaluate the effect of different inoculum sources on the rice straw anaerobic digestion. Six different digestates (DM, SM, CM, MS, AGS and PS) were applied as inoculums and their effects were evaluated in batch reactors. The results indicated that digested manures were m...

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Bibliographic Details
Published in:Bioresource technology 2014-04, Vol.158, p.149-155
Main Authors: Gu, Yu, Chen, Xiaohua, Liu, Zhanguang, Zhou, Xuefei, Zhang, Yalei
Format: Article
Language:English
Subjects:
Anaerobiosis
Biofuel production
Biofuels
Biogas
Biological and medical sciences
Biological treatment of sewage sludges and wastes
Bioreactors
Biotechnology
Energy
Environment and pollution
Food industries
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
Inoculum
Lignin - metabolism
Lignocellulose
Manure
Oryza - metabolism
Oryza sativa
Reactors
Rice
Straw
Use and upgrading of agricultural and food by-products. Biotechnology
Xylanase
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Summary:The aim of this study was to evaluate the effect of different inoculum sources on the rice straw anaerobic digestion. Six different digestates (DM, SM, CM, MS, AGS and PS) were applied as inoculums and their effects were evaluated in batch reactors. The results indicated that digested manures were more suitable than sludge. Reactors inoculated with digested manures achieved higher, biogas production and lignocellulose degradation. The better adaptability of digested manures had relationship with its higher cellulase and xylanase activities and sufficient nutrients content. DM had the best effect among all three digested manures. Reactors inoculated with DM achieved the highest biogas production (325.3 mL/g VS) and enzymes activities. The synergism between cellulase and xylanase activities played an important role in lignocellulose degradation.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2014.02.011