Journal
RSC ADVANCES
Volume 8, Issue 54, Pages 30725-30731Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra05047c
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Funding
- National Natural Science Foundation of China [31600475, 21606229]
- Natural Science Foundation of Guangdong Province [2016A030310124, 2017A030310052]
- project of Guangzhou Science and Technology [201707010241, 201610010014]
- Key Research and Development Plan of Jiangsu Province [BE2016706, BE2016125]
- Special Support Project of Guangdong Province [2016TQ03N881]
- Youth Innovation Promotion Association CAS [2015290]
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Sugarcane bagasse (SCB) substrates with different chemical compositions were prepared by different pretreatments including dilute acid (DA), acidic sodium chlorite (ASC), alkali solution (AS), and alkali hydrogen peroxide (AHP). The compositions and chemical structures of pretreated SCB were characterized by HPLC, FTIR, XRD, and SEM. The addition of xylanase can significantly boost cellulase to hydrolyze cellulose and xylan especially for AS and AHP treated substrates. The obvious linear relationships between lignin removal and substrate digestibility were observed. ASC treated substrates obtained the highest digestibility (98.87%) of cellulose due to sufficiently removing lignin from SCB, whereas AHP treated substrates achieved the highest digestibility (84.61%) of xylan by cleaving the acetyl group on xylan and extending delignification. It was found that the synergistic effects between cellulase and xylanase were substrate and time specific. The better degree of synergy for the sugar production was in the initial hydrolysis stage but decreased in the later hydrolysis stage.
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