کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4997085 | 1459902 | 2017 | 8 صفحه PDF | دانلود رایگان |
- UHP enhances lignocellulosic destructuration and enzymatic hydrolysis of corncob.
- UHP caused significant differences in XOS yields between native and pretreated corncob.
- UHP at 100Â MPa significantly improved the accessibility of endo-xylanase.
- UHP pretreatment at 100Â MPa relatively did not affect composition of corncob.
In this study, the pressures at 50-500Â MPa were evaluated at different time to pretreat and further enzyme hydrolysis. The ultra-high pressure (UHP) pretreatment at 100Â MPa for 10Â min led to improved accessibility of enzyme for conversion of xylan to xylooligosaccharide (XOS). The maximum XOS yield of 35.6Â mg/g substrate was achieved and firstly reported at 10% (w/v) of substrate, 100Â U of endo-xylanase/g corncobs and incubation time of 18Â h. The enzymatic hydrolysis efficiency was increased by 180.3% and released a high amount of xylobiose. The UHP pretreatment relatively did not affect to the composition of corncob, but decreased 34.3% of lignin. Interestingly, antioxidant activities of XOS using UHP pretreatment were higher than untreated corncob. The UHP pretreatment improved lignocellulosic destructuration and XOS yields in a shorter time without the need of chemicals, implying that UHP could be an effective pretreatment of biomass with a chemical-free process.
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Journal: Bioresource Technology - Volume 241, October 2017, Pages 537-544