木质纤维原料生物转化燃料乙醇的研究进展

Progress in Bioconversion of Lignocellulosic Materials for Fuel Ethanol

木质纤维生物量能够用来生产一种可替代有限的石油产品的能源——乙醇。木质纤维的转化主要分两个步骤木质纤维生物量中纤维素水解生成还原糖;糖发酵成乙醇。基于目前的技术,木质纤维原料生产乙醇的主要问题是得率低、水解成本高。促进木质纤维水解的方法包括木质纤维原料预处理脱除木素和半纤维素;纤维素酶的优化;同步糖化发酵法(SSF)。

Lignocellulosic material can be utilized to produce ethanol, a promising alternative energy source for the limited crude oil. There are mainly two process involved in the conversion: hydrolysis of cellulose to produce reducing sugars, and fermentation of the sugars to ethanol. The main challenges are the low yield and high cost of hydrolysis process based on current technologies. Pretreatment of lignocellulosic material to remove lignin and hemicelluloses, optimization of the cellulase enzymes, and simutineous saccharification and fermentation can significantly enhance the hydrolysis of cellulose.