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In order to research biomethane production potential, and analyze microbial community characteristics of lignocellulosic biomass, microcrystalline cellulose, xylan, alkaline lignin, and corn straw were mixed with anaerobic granular sludge for anaerobic digestion. The cumulative methane production of MC, XY, and CS system was 285.23 ± 5.17 mL/ VS, 370.83 ± 14.60 mL/g VS, 172.06 ± 8.56 mL/g VS respectively. Cellulose and hemicellulose can be converted by microorganisms into biomethane. The biodegradability and dynamic model fitting results also revealed the anaerobic lag time of MC system was longer than XY, and CS system. In addition, the fermentation cycle of MC also was longer than XY and CS. T78, vadinCA02, Clostridium and Bacteroides played important roles in hydrolytic-acidification, and especially the relative abundance of Clostridium, a genus of cellulose-degrading bacteria, increased to 5.65% (MC), 3.65% (XY) and 2.84% (CS) respectively. Moreover, Methanosaeta and Methanobacterium were the two main anaerobic archaea in MC, XY and CS anaerobic digestion systems.

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Novel Insights into Anaerobic Digestion of Different Compositions in Lignocellulosic Biomass: Focus on Biomethane Production Potential, Kinetic Analysis, and Microbial Community Characteristics

  • 会议论文

  • 发表日期：

    2025年

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  • Xiteng Chen,
  • Xinzi Wang,
  • Ziqing Li

摘要

In order to research biomethane production potential, and analyze microbial community characteristics of lignocellulosic biomass, microcrystalline cellulose, xylan, alkaline lignin, and corn straw were mixed with anaerobic granular sludge for anaerobic digestion. The cumulative methane production of MC, XY, and CS system was 285.23 ± 5.17 mL/ VS, 370.83 ± 14.60 mL/g VS, 172.06 ± 8.56 mL/g VS respectively. Cellulose and hemicellulose can be converted by microorganisms into biomethane. The biodegradability and dynamic model fitting results also revealed the anaerobic lag time of MC system was longer than XY, and CS system. In addition, the fermentation cycle of MC also was longer than XY and CS. T78, vadinCA02, Clostridium and Bacteroides played important roles in hydrolytic-acidification, and especially the relative abundance of Clostridium, a genus of cellulose-degrading bacteria, increased to 5.65% (MC), 3.65% (XY) and 2.84% (CS) respectively. Moreover, Methanosaeta and Methanobacterium were the two main anaerobic archaea in MC, XY and CS anaerobic digestion systems.