Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (17): 144-150.doi: 10.11924/j.issn.1000-6850.casb2021-0009

Special Issue: 生物技术 农业工程

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Effect of Adding Cellulase-Producing Compound Flora on Biogas Production by Anaerobic Dry Fermentation

Zhang Chen(), Yan Hongxin, Ji Dong, Wei Zhihao, Yao Zhisong, CAMARA ZOUMANA, Su Youyong()   

  1. Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming 650500
  • Received:2021-01-06 Revised:2021-04-03 Online:2021-06-15 Published:2021-06-29
  • Contact: Su Youyong E-mail:zhangchen95@foxmail.com;497611561@qq.com

Abstract:

In order to improve the utilization rate of crop straws and livestock manure, a cellulose-degrading compound flora is added to the biogas anaerobic fermentation system to improve gas production performance. The experiment used corn stalk and cow dung as raw materials. The fermentation condition was: 37℃ of fermentation temperature, 20% of total solid concentration, 30% of inoculum content, 1:2 of manure-to-grass ratio, and 1% of the compound flora was added to anaerobic dry fermentation to produce biogas. The results show that the compound flora consisting of Bacillus siamensis and Bacillus subtilis subsp. Stercoris could increase biogas production by 25% and methane production by 55%, and gas production rate of raw materials is 86.4 mL/gTS and 111.4 mL/gVS, respectively. The experiment could provide certain reference value for the utilization of biomass energy containing cellulose.

Key words: corn straw, cow manure, dry fermentation, compound flora, volumetric biogas yield

CLC Number: