稻草秸秆同时糖化法产乙醇的动力学研究(英文)  

Kinetics of Fuel Ethanol Production by Simultaneous Saccharification and Fermentation of Straw Stalk

作　　者：陈坤[1,2] 徐龙君 杨睿[1] 毕智明[2] 符志磊[2] 

机构地区：[1]重庆科技学院安全工程学院,重庆401331 [2]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400030

出　　处：《林产化学与工业》2014年第1期13-18,共6页Chemistry and Industry of Forest Products

基　　金：重庆市自然科学基金项目(CSTC2012JJB90010)

摘　　要：在纤维素酶20 U/g,发酵温度38℃,接种量15%,管囊酵母和酿酒酵母的接种比例2∶1条件下,选择不同的固液比(1∶5、1∶10、1∶15和1∶20),研究了稻草秸秆同时糖化法产乙醇的动力学。结果表明:固液比1∶15时,获得了较高的乙醇产率为0.183 g/g,方程c=abt/(1+bt)可以被用来描述乙醇浓度(c)与发酵时间(t)的关系,动力学参量a随着固液比减小而减小,而动力学参量b随着固液比的减小而增加;同时,在不同固液比条件下,稻草秸秆转化乙醇反应被证明是类分形的,方程k=k1t-h能被用来很好的描述速率常数与发酵时间之间的关系。The kinetics of fuel ethanol production by simultaneous saccharification and fermentation （ SSF） of straw stalk in different solid-liquid ratios （1：5, 1：10, 1：15 and 1：20） was studied. Experimental process parameters were cellulose enzyme 20 U/g, fermentation temperature 38 ℃ , inoculum size 15 % and inoculation proportion 2：1 （ tube capsule yeast and S. cerevisiae）. The results showed that the highest yield of ethanol （0. 183 g/g） was obtained when a solid-liquid ratio was 1：15. The relationship between ethanol concentration c and fermentation time t could be described as c=abt/（1＋bt）. The parameter a decreased with a decreasing solid-liquid ratio, whereas the parameter b increased. The conversion reaction of straw stalk to ethanol under different solid-liquid ratios was fractal-like. The relationship between the rate constant and fermentation time was described in the following equation, i. e. , k=k1 t-h .

关 键 词：稻草秸秆 燃料乙醇 动力学 类分形 

分 类 号：TQ35[化学工程]