Journal
BIORESOURCE TECHNOLOGY
Volume 220, Issue -, Pages 637-640Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.08.072
Keywords
Hydrotropic pretreatment; Organosolv pretreatment; Surface chemical composition; Cellulase adsorption; Enzymatic saccharification
Funding
- China Postdoctoral Science Foundation [2016M592494]
- State Key Laboratory of Pulp and Paper Engineering [201530]
- Fundamental Research Funds for the Central Universities [2015ZM168]
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The objective of this study was to investigate the effects of organosolv and hydrotropic pretreatments on improving enzymatic hydrolysis of eucalyptus. The chemical composition of the fiber surface was analyzed using X-ray photoelectron spectroscopy (XPS) to determine the surface characteristics of pretreated eucalyptus. Other than the significant decrease of surface coverage by lignin, hydrotropic pretreatment was more effective in removing the lignin and xylose from fiber cell walls than organosolv pretreatment. The restriction of acetyl and phenolic groups in pretreated substrates was typically eliminated by hydrotropic pretreatments. Moreover, fiber structure and morphology after pretreatments were more suitable for enzymatic hydrolysis. Cellulase adsorption capacity was notably improved by hydrotropic pretreatment, which indicating the better enzyme accessibility of cellulose in pretreated substrates. Eventually, higher glucose yield was obtained with hydrotropic pretreatment. In addition, the precipitated lignin as an important by-product of pretreatments was characterized by Fourier transforms infrared spectroscopy (FTIR) also. (C) 2016 Elsevier Ltd. All rights reserved.
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