林产化学与工业2011，Vol.31Issue(6)：35-40,6.
玉米秸秆生物炼制燃料乙醇的研究
Biorefinery of Corn Stover for Fuel Ethanol
摘要
Abstract
Com stover was pretreated by moderate acid and then washed by water. The solid residue after filtration was hydrolyzat-ed to monosaccharide with cellulase for further fermentation to ethanol, white the liquid fraction after filtration was detoxified with trialkylamine extraction to ferment to ethanol. The material balance was carried out in the whole process. The results showed that the optimal pretreatment conditions were temperature 100 t, sulfuric acid mass fraction 3 % and time 12 h. After 24 h fermentation of the condensed enzymatic hydrolyzate containing 138. 72 g/L of glucose, the sugar utilization rate was 99.02 % and the ethanol mass concentration reached its peak value of 62.98 g/L, which corresponded to 89.90 % of the theoretical value. Pre-hydrolyzate was detoxified by trialkylamine extraction, 72.73 % of acetic acid, 42. 86 % of 5-hydroxymethylfurfural and 100 % furfural could be removed. The fermentability of the detoxified prehydrolyzate was significantly improved. After 48 h fermentation of the detoxificated prehydrolyzate containing 7. 80 g/L of glucose and 52. 80 g/L of xylose, the sugar utilization rate was 93.17 % , and the ethanol concentration reached its peak value of 21.76 g/L, which corresponded to 82.34 % of the theoretical value. After materials balance, it required 6.8 t absolutely dry com stover to produce one ton ethanol. The process of this study provided the reference to realize the industrialization of hexose and pentose fermentation separately.关键词
玉米秸秆/预处理/酶解/脱毒/乙醇发酵Key words
corn stover/pretreatment/enzymatic hydrolysis/detoxification/ethanol fermentation分类
化学化工引用本文复制引用
朱均均,陈尚钘,勇强,徐勇,陈牧,余世袁..玉米秸秆生物炼制燃料乙醇的研究[J].林产化学与工业,2011,31(6):35-40,6.基金项目
国家林业局林业公益性行业科研专项(201004001) （201004001）
江苏高校科技创新团队资助项目(无编号) （无编号）
江苏高校优势学科建设工程资助项目(无编号) （无编号）
