Effect of a Cellulose-Degrading Strain on Anaerobic Fermentation of Corn Straw

Abstract:

In order to improve the rate of degradation of cellulose in corn straw, the study has an important significance that compost corn straw with inoculating high-efficient microbe agents. The experiment inoculated a cellulose-degrading strain F2 which was screened from compost into compost pretreatment, the VS of corn straw reduced from 93.14% to 71.69% after 15 days, the content of cellulose reduced from 34.12g·kg-1 to 25.66g·kg-1, the rate of degradation was 24.79% which was 10.60% higher than those without the strain. An anaerobic fermentation experiment was carried out with the two groups of composted corn straw and mixed pig feces with a certain ratio, and investigations of biogas production, pH, content of volatile fatty acids(VFA) and rate of methane production were conducted. The results were that the corn straw composted with the cellulose-degrading strain peaked 4 days earlier, the maximal daily biogas production was 1470mL, the cumulative biogas production reached 23641mL which was 16.87% higher and operated stably earlier. The study showed that the cellulose-degrading strain had a strong capacity to degrade cellulose in corn straw, and then improved the performance of anaerobic digestion.

• Periodical: Advanced Materials Research (Volumes 356-360)
• Pages: 2510-2514
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.356-360.2510
• Online since: October 2011
• Authors: Ming Fen Niu, Sai Yue Wang, Wen Di Xu, An Dong Ge, Hao Wang
• Keywords: Anaerobic Fermentation, Cellulose-Degrading Strain, Compost Pretreatment, Rate of Degradation

References

[1] Du Mou-tao, Yuan Xiao-dong, Guo He-jun. Status and prospects of biomass utilization in China[J].Energy and Environment, 2008,(02):76-79. In Chinese.

[2] Shi Lei, Zhao You-cai, Chai Xiao-li. Comprehensive utilization techniques progress of crop straws in China[J].China Biogas,2005,23(2):11-14. In Chinese.

[3] Xiong Cheng-yong, Li Jian, Huang Li-hong.Simple analysis on straw utilization for household biogas digester[J]. Renewable Energy, 2003(3):44-45,57. In Chinese.

[4] Feng Hong, Li Hua-xing.The functions of microbial inoculum and its application in composting[J]. Ecological Environment, 2004,(03):439-441. In Chinese.

[5] Pang Xiao-ping, Niu Ming-fen, et al. Anaerobic fermentation conditions of mixed corn straw and pig excreta in North China[J]. Chinese Journal of Ecology, 2011, 30(1): 126-130. In Chinese.

[6] Xue Hui-qin, Hang Yi-qiong, Chen Yi. Methods to Determine the Contents of Cellulose and Lignin in rice straw[J]. Shanghai Journal of Animal Husbandry and Veterinary Medicine,2001,2,15. In Chinese.

[7] Chendu Institute of biology,Chinese Academy of Sciences. Conventional analysis of methane fermentation[M]. Beijing,Beijing Science and Technology Press, 1984:17-51. In Chinese.

[8] Li Shi-mi, Kou Wei, Zhang Xiao-jian, et al. The screening of cellulose-degrading bacteria and its applications in biogas research[J]. Renewable Energy Resources, 2009,27(2):40-42. In Chinese.

[9] DUARTE A, ANDERSON G. Inhibition modeling in anaerobic digestion[J]. Water Science and Technology,1982,14:749-763.

[10] Wang Yong-ze, Shao Ming-sheng, et al. Effect of pH value on biogas production by anaerobic fermentation of rice straw[J]. Journal of Anhul Agricultural Sciences,2009,37(31): 15093-15094, 15098. In Chinese.

[11] Zhang Quan-guo.Technology and application of biogas[M].Chemical Industry Press,2005.In Chinese.

[12] Li Dong, Ma Long-long, Yuan Zhen-hong, et al. Experimental study on dry anaerobic digestion of rice straw at ambient temperature in South China[J].Transactions of the Chinese Society of Agricultural Engineering, 2006, 22(12):176-179. In Chinese.

[13] Fang Wen-jie,Li Xiu-jin,et al.Study on the mechanism of the influence of chemical and retting pretreatment on rice straw anaerobic biogas production[J].Renewable Energy Resources, 2007,25(4):21-24. In Chinese.