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

PeerJ

article

Hongdou Liu¹  Liqiang Zhang³  Yu Sun¹  Guangbo Xu¹  Weidong Wang³  Renzhe Piao¹  Zongjun Cui⁴  Hongyan Zhao¹ 

[1] Yanbian University;College of Land and Environment, Shenyang Agricultural University;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;China Agricultural University

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

DOI  :  10.7717/peerj.12364

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 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】

CC BY