Open AccessDegradation of lignocelluloses in straw using AC-1, a thermophilic composite microbial system
Author(s) -
Hongdou Liu,
Liqiang Zhang,
Yiwen Sun,
Guangwen Xu,
Weidong Wang,
Renzhe Piao,
Zongjun Cui,
Hang Zhao
Publication year - 2021
Publication title -
peerj
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.927
H-Index - 70
ISSN - 2167-8359
DOI - 10.7717/peerj.12364
Subject(s) - hemicellulose , lignin , cellulose , straw , degradation (telecommunications) , pulp and paper industry , chemistry , decomposition , microbial inoculant , thermophile , acetic acid , composite number , rice straw , materials science , food science , composite material , biochemistry , biology , organic chemistry , horticulture , inoculation , inorganic chemistry , telecommunications , computer science , engineering , enzyme
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.