农业环境科学学报Issue(6)：1210-1216,7.DOI:10.11654/jaes.2015.06.027
水热-乙醇提取处理玉米秸秆促进酶解效率
Enhancement of Enzymatic Hydrolysis of Corn Stover by Liquid Hot Water Pretreatment and Ethanol Extraction
摘要
Abstract
Lignin could not be significantly removed from lignocellulose by liquid hot water(LHW)pretreatment, but lignin would mi-grate from cell wall and redeposit on the surface of cell wall at high temperature during pretreatment. To take advantage of this characteris-tic, we examined the changes of main components and enzymatic hydrolysis of corn stover pretreated by LHW pretreatment before and after ethanol extraction.Ethanol extraction process was also optimized. Compared to LHW pretreatment, ethanol extraction removed some lignins from, increased cellulose content in and improved cellulose digestibility of corn stover. Lignin removal increased with increasing temperature of LHW pretreatment. The optimal ethanol extraction was as follows:25 of liquid-solid ratio, room temperature, 120 r·min-1, and 10 h. For corn stover pretreated at 210℃for 20 min, ethanol extraction decreased lignin from 30.5%to 18.2%, while increased cellulose content from 62.2%to 73.6%. After ethanol extraction, the enzymatic hydrolysis time was shortened from 48h to 24h. The cellulose digestibility reached 93.2%(15 FPU·g-1 cellulose).关键词
生物质/水热/预处理/乙醇抽提/玉米秸秆/酶解Key words
biomass/hydrothermal/pretreatment/ethanol extraction/corn stover/enzymatic hydrolysis分类
资源环境引用本文复制引用
李梓木,于艳玲,赵桂红,孙嘉星,李冬梅,黄玉东,冯玉杰..水热-乙醇提取处理玉米秸秆促进酶解效率[J].农业环境科学学报,2015,(6):1210-1216,7.基金项目
国家自然科学基金资助项目（51108116）；国家杰出青年科学基金（51125033）；黑龙江省博士后面上基金（LBH-Z12132）；上海市城市化生态过程与生态恢复重点实验室开放课题 （）
