文献类型：期刊文献

中文题名：微波预处理对玉米秸秆的组分提取及糖化的影响

英文题名：Effect of microwave pretreatment on component fractionation and saccharification of corn stalk

作者：邹安[1];沈春银[1];赵玲[1];戴干策[1]

机构：[1]华东理工大学化工学院/化学工程联合国家重点实验室,上海200237

年份：2011

卷号：27

期号：12

起止页码：269

中文期刊名：农业工程学报

外文期刊名：Transactions of the Chinese Society of Agricultural Engineering

收录：CSTPCD;;EI(收录号：20115014603030);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：长江学者和创新团队发展计划(IRT0721);高等学校学科创新引智计划(B08021);华东理工大学化学工程联合国家重点实验室自主开放课题

语种：中文

中文关键词：微波;分离;水解;玉米秸秆;糖化;半纤维素

外文关键词：microwaves; fractionation; hydrolysis; corn stalk; saccharification; hemicelluloses

摘要：为了分离得到玉米秸秆中的半纤维素、木质素,改善纤维素的酶水解可及性,对玉米秸秆进行了二步微波预处理法研究。考察了秸秆粒径、液固比、碱及甘油用量、微波功率与处理时间对半纤维素和木质素得率的影响;探讨了预处理后秸秆的酶水解性能。得到的优化预处理条件为:玉米秸秆粒径40～80目;微波-碱预处理功率116.7W/g、时间10min、液固比20mL/g、碱用量150%(质量分数);微波-甘油预处理功率66.7W/g、处理时间30min、液固比20mL/g、甘油质量分数100%。试样结果表明:经微波预处理后每10g玉米秸秆最终可得到2.48g半纤维素、0.95g木质素,3.55g还原糖;二步微波预处理不仅能够提取出玉米秸秆中的半纤维素、木质素,而且提高了纤维素水解的酶可及性,实现了组分的分离。
In order to realize component fractionation in corn stalk, a two-stage microwave pretreatment method,which includes microwave-alkali pretreatment for hemicelluloses extraction and microwave-glycerine pretreatment for lignin extraction,was studied in a special microwave reactor. The effects of particle size, liquid-to-solid ratio, alkali and glycerine consumption, processing time and microwave power on extraction were investigated respectively. The performance of enzymatic hydrolysis saccharification of microwave pretreated corn stalk was studied also. The results showed that the liquid-to-solid ratio 20 mL/g, alkali consumption 150%wt, treatment time 10 min, microwave power 116.7 w/g and the particle size 40-80 mesh were appropriate parameters for hemicelluloses extraction with microwave-alkali pretreatment; while the liquid-to-solid ratio 20 mL/g, pure glycerine as solvent, treatment time 30 min, and microwave power 66.7 w/g were found to be optimal for lignin extraction with microwave-glycerine pretreatment. Consequently the extraction products of 2.48 g hemicelluloses, 0.95 g lignin and 3.55 g reducing sugars were obtained from every 10 g corn stalk in terms of the two optimal conditions. This indicates that the component fractionation of corn stalk can be accomplished and enzymatic hydrolysis saccharification can be enhanced by two-stage microwave pretreatment method.