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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (8): 76-82.doi: 10.11924/j.issn.1000-6850.casb2024-0553

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Research Progress on Straw Pretreatment in Anaerobic Dry Fermentation for Biogas Production

WANG Aolin1(), ZHANG Hongqiong2, MENG Li1,3()   

  1. 1 Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University/Key Laboratory of Molecular Biology of Higher Education Institutions of Heilongjiang Province, Harbin 150080
    2 College of Engineering, Northeast Agricultural University, Harbin 150030
    3 Heilongjiang Boneng Green Energy Technology Group Co., Ltd., Harbin 150040
  • Received:2024-09-02 Revised:2024-12-26 Online:2025-03-15 Published:2025-03-14

Abstract:

Abundant crop straw production in our country makes anaerobic dry fermentation for biogas production an important way to utilize crop straw resources. However, the dense structure of lignocellulose in straw limits the hydrolysis and acidification of straw, making it difficult for anaerobic bacteria to degrade straw and produce biogas. Currently, pretreatment of straw is considered to be an effective way to enhance the rate of anaerobic digestion and improve biogas yield. The text elaborates on the mechanism of anaerobic dry fermentation, and reviews the common pretreatment methods that can increase the efficiency of biogas production in straw anaerobic dry fermentation, including physical, chemical, biological, and combined pretreatment methods, and provides a perspective on the technology of straw pretreatment.

Key words: straw, pretreatment, anaerobic dry fermentation, biogas, lignocellulose