期刊
INDUSTRIAL CROPS AND PRODUCTS
卷 113, 期 -, 页码 348-357出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.indcrop.2018.01.047
关键词
Corn bran; Autohydrolysis; Enzymatic hydrolysis; Monosaccharide; Ferulic acid
资金
- 948 research project from the State Forestry Administration of China [2013-4-16]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Doctorate Fellowship Foundation of Nanjing Forestry University
The combination of hydrothermal pretreatment (autohydrolysis) and enzymatic hydrolysis was comprehensively evaluated for the efficient release of monosaccharides and ferulic acid from corn bran. Arabinan was depolymerized and solubilized more easily during autohydrolysis compared to xylan, esterified ferulic acid, and the acetyl group. Also, the enzymatic xylose yield showed strong linear correlation with arabinan, ferulic acid, and acetic acid content in autohydrolysis residues while correlations between enzymatic glucose yield and hemicellulose contents were separated into two stages with different slopes. The addition of a few debranching enzymes to commercial cellulase and xylanase only slightly enhanced enzymatic hydrolysis of autohydrolysis residues, whereas an enzyme blend from Aspergillus oryzae and Eapenicilliwn parvum showed a significant synergistic effect. Desirable combined hydrolysis yields of glucose (72.26%), xylose (75.87%), arabinose (76.95%), and ferulic acid (74.13%) were obtained after autohydrolysis at 165 degrees C for 40 min and subsequent hydrolysis by an equal mixture blend produced by A. oryzae and E. parvum at an enzyme loading dosage of 14.1 mg protein/g dry destarched corn bran.
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