Degradation of lignocelluloses in straw using AC-1, a thermophilic composite microbial system

PeerJ

卷:9

Zongjun Cui¹  Weidong Wang²  Liqiang Zhang²  Hongyan Zhao³  Hongdou Liu³  Renzhe Piao³  Yu Sun³  Guangbo Xu³ 

[1] China Agricultural University, Beijing, China;

[2] Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing, China;

[3] Yanbian University, Yanji, China;

关键词: Lignin;    Microbial community;    Thermophilic;    Straw degradation;   

DOI  :  10.7717/peerj.12364

来源: DOAJ

【 摘 要 】

In composting, the degradation of lignocellulose in straw is problematic due to its complex structures such as lignin. A common solution to this problem is the addition of exogenous inoculants. AC-1, a stable thermophilic microbial composite, was isolated from high temperature compost samples that can decompose lignocellulose at 50–70 °C. AC-1 had a best degradation efficiency of rice straw at 60 °C (78.92%), of hemicellulose, cellulose and lignin were 82.49%, 97.20% and 20.12%, respectively. It showed degrad-ability on both simple (filter paper, absorbent cotton) and complex (rice straw) cellulose materials. It produced acetic and formic acid during decomposition process and the pH had a trend of first downward then upward. High throughput sequencing revealed the main bacterial components of AC-1 were Tepidimicrobium, Haloplasma, norank-f-Limnochordaceae, Ruminiclostridium and Rhodothermus which provides major theoretical basis for further application of AC-1.

【 授权许可】

Unknown