PKinetics analysis of the enzymatic hydrolysis of cellulose from straw stalk

查看全文 作　　者：CHEN [1,2]Kun;XU [1]Longjun;BI [1]Zhiming;FU [1]Zhilei

机构地区：[1]State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University;[2]College of Safety Engineering, Chongqing University of Science and Technology

出　　处：《Chinese Journal Of Geochemistry》索引2013年第32卷第1期,共6页

基　　金：the Chongqing Science and Technology Commitee for their financial support (CSTC2012JJB90010) 摘　　要：The effects of several parameters on the simultaneous saccharification and fermentation of straw stalk for ethanol fuel production were investigated on the basis of orthogonal experiments. The parameters include temperature and time of fermentation, quantity and proportion of yeast inoculation, as well as cellulase dosage. An ethanol yield of 0.183 g/g was obtained from the straw stalk pretreated with diluted acid under determined optimum conditions. These conditions were: fermentation temperature: 38℃; fermentation time: 72 h; yeast inoculation quantity: 15%; yeast inoculation proportion: 2:1; and cellulose enzyme dosage: 20 U/g. The relationship between ethanol concentration c and fermentation time t is presented as follows, c=abt/(1+bt). The rate constant k of straw stalk hydrolysis by the cellulose enzyme depends on hydrolysis time, as described by k=k1t-h. Therefore, straw stalk hydrolysis reaction by the cellulose enzyme is fractal-like. 关键词：纤维素酶酶水解动力学分析秸秆发酵时间反应速率常数乙醇燃料发酵生产

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PKinetics analysis of the enzymatic hydrolysis of cellulose from straw stalk

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