Journal
BIORESOURCE TECHNOLOGY
Volume 245, Issue -, Pages 419-425Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.08.037
Keywords
Cupriavidus basilensis B-8; Dilute acid pretreatment (DAP); Bacteria-enhanced dilute acid pretreatment (BE-DAP); Lignocellulosic biomass
Funding
- Changjiang Scholars [T2011116]
- National Funds for Distinguished Young Scientists of China [50925417]
- National Natural Science Foundation of China [51634010, 31400115, 51474102]
- Special Program on Environmental Protection for Public Welfare [201509050]
- China Postdoctoral Science Foundation [2017M612594]
- Postdoctoral Science Foundation of Central South University [140050002]
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Pretreatment is indispensable for the large-scale and low-cost bio-products production from lignocellulosic biomass. Herein, a new bacteria-enhanced dilute acid pretreatment (BE-DAP) strategy was introduced. Cupriavidus basilensis B-8 as a potential bacterium for lignin degradation was employed. Multi-scale characterizations on the physicochemical structure of rice straw indicated that Cupriavidus basilensis B-8 could act on the lignin droplets formed in dilute acid pretreatment (DAP), and dig out these droplets to recover cracks and holes on rice straw surface, leaving an opened and porous structure for the easy access of enzyme to inner cellulose. Eventually, the enzymatic digestibility of RS was increased by 35-70% and 173-244% in BE-DAP compared to DAP pretreated and untreated RS, respectively. The BE-DAP strategy, as well as its physicochemical mechanism, opened new perspectives for lignocellulose pretreatment.
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