Journal
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
Volume 172, Issue 3, Pages 1365-1376Publisher
HUMANA PRESS INC
DOI: 10.1007/s12010-013-0604-5
Keywords
Corn stover; Corn stover silage; Biological pretreatment; Phanerochaete chrysosporium; Anaerobic digestion
Funding
- project of Key Technologies on Energy Cycle Regulation in Typical Agricultural System [2012BAD14B03]
- Chinese Universities Scientific Fund [2013YJ007]
- Non-profit Research Foundation for Agriculture [201103039]
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The microbial pretreatment of corn stover and corn stover silage was achieved via the solid-state cultivation of Phanerochaete chrysosporium; pretreatment effects on the biodegradability and subsequent anaerobic production of biogas were investigated. The peak levels of daily biogas production and CH4 yield from corn stover silage were approximately twice that of corn stover. Results suggested that ensiling was a potential pretreatment method to stimulate biogas production from corn stover. Surface morphology and Fourier-transform infrared spectroscopy analyses demonstrated that the microbial pretreatment of corn stover silage improved biogas production by 10.5 to 19.7 % and CH4 yield by 11.7 to 21.2 % because pretreatment could decrease dry mass loss (14.2 %) and increase substrate biodegradability (19.9 % cellulose, 32.4 % hemicellulose, and 22.6 % lignin). By contrast, the higher dry mass loss in corn stover (55.3 %) after microbial pretreatment was accompanied by 54.7 % cellulose, 64.0 % hemicellulose, and 61.1 % lignin degradation but did not significantly influence biogas production.
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