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Hemicellulose bioconversion

机译:半纤维素生物转化

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摘要

Various agricultural residues, such as corn fiber, corn stover, wheat straw, rice straw, and sugarcane bagasse, contain about 20-40% hemicellulose, the second most abundant polysaccharide in nature. The conversion of hemicellulose to fuels and chemicals is problematic. In this paper, various pretreatment options as well as enzymatic saccharification of lignocellulosic biomass to fermentable sugars is reviewed. Our research dealing with the pretreatment and enzymatic saccharification of corn fiber and development of novel and improved enzymes such as endo-xylanase, beta-xylosidase, and alpha-L-arabinofuranosidase for hemicellulose bioconversion is described. The barriers, progress, and prospects of developing an environmentally benign bioprocess for large-scale conversion of hemicellulose to fuel ethanol, xylitol, 2,3-butanediol, and other value-added fermentation products are highlighted.
机译:各种农业残留物,例如玉米纤维,玉米秸秆,小麦秸秆,稻草和甘蔗渣,都含有约20-40%的半纤维素,这是自然界中第二丰富的多糖。半纤维素向燃料和化学物质的转化是有问题的。在本文中,综述了各种预处理方法以及将木质纤维素生物质酶促糖化为可发酵糖的方法。我们的研究涉及玉米纤维的预处理和酶促糖化以及新型和改良的酶(例如木聚糖内切酶,β-木糖苷酶和α-L-阿拉伯呋喃糖苷酶)在半纤维素生物转化中的开发。着重指出了开发环境友好的生物工艺以将半纤维素大规模转化为燃料乙醇,木糖醇,2,3-丁二醇和其他增值发酵产品的障碍,进展和前景。

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