Journal
BIORESOURCE TECHNOLOGY
Volume 286, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.121392
Keywords
Sugarcane bagasse; Fenton oxidation reaction; Sulfomethylation pretreatment; Enzymatic saccharification; Lignin inhibition
Funding
- National Natural Science Foundation of China [31760194]
- Yunnan Province Agricultural Basic Research Joint Program [2017FG001(-025)]
- Yunnan Provincial Department of Education Science Research Fund Project [2017YJS092]
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The sugarcane bagasse (SCB) was pretreated by the sequential Fenton oxidation and sulfomethylation pretreatment (FSP) for reducing the lignin inhibition in enzymatic saccharification. The FSP showed the delignification of 67.76% and the glucan retention in pretreated solid of 97.81%. Compared with sulfomethylation pretreated SCB (SP-SCB), the lignin surface coverage and surface hydrophobicity of FSP-SCB decreased by 1.84 and 4.84 times, respectively, led to enzymatic accessibility increased by 20%. Using the cellulase loading of 20 FPU/g glucan, the 72 h yields of glucose and xylose were 76.24% and 64.83%, respectively, which was 1.3-2.0 times higher than that of sulfomethylation treated SCB alone. Fenton oxidative reaction as a pre-step will help sulfomethyl group to easily and more introduce on aromatic ring, thereby accelerating the delignification.
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