期刊
BIORESOURCE TECHNOLOGY
卷 257, 期 -, 页码 62-68出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.02.029
关键词
Lignin depolymerization; Pandoraea sp B-6; Enzymatic digestibility; DES-microbial pretreatment
资金
- key project of National Natural Science Foundation of China [51634010]
- National Natural Science Foundation of China [31400115, 51474102]
- China Postdoctoral Science Foundation [2017 M612594]
- Postdoctoral Science Foundation of Central South University [140050002]
Lignin depolymerization is a challenging process in biorefinery due to the recalcitrant and complex structure of lignin. This challenge was herein addressed via elaborating a new strategy of combining the bacterial strain Pandoraea sp. B-6 (hereafter B-6) with a deep eutectic solvent (DES) to pretreat rice straw (RS). In this approach, DES effectively depolymerized lignin yet easily caused sugar loss under severe conditions. B-6 not only overcame the obstacle of lignin droplets, but also significantly improved enzymatic digestibility. After B-6 assisted DES pretreatment, the reducing sugar yield increases by 0.3-1.5 times over DES pretreatment and 0.9-3.1 times over the untreated RS. Furthermore, a cornhusking mechanism explaining the improvement of the enzymatic digestibility by B-6 was suggested based on physicochemical characterizations of the untreated and pretreated RS. The findings provided a comprehensive perspective to establish a DES-microbial process for lignocellulose pretreatment.
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