摘要
在同步糖化发酵生产乙醇过程中,探究其内部规律对深入研究乙醇发酵过程有着重要意义。利用Aspen Dynamics软件对间歇操作下的同步糖化发酵生产乙醇过程进行模拟,并与Aspen Plus间歇发酵模拟进行比较。考察了糖化酶加入量和酵母接种率对发酵过程中糊精浓度、葡萄糖浓度和乙醇浓度以及相应反应速率的影响。相比于Aspen Plus模拟间歇发酵,Aspen Dynamics模拟可以考虑加料对发酵的影响,模拟更符合实际。糊精消耗速率在16 h达到最大,葡萄糖消耗速率和乙醇生成速率在20h后变化趋于平稳。最适糖化酶加入量为100 U/g,最适酵母接种率为30%。
As to the ethanol production by simultaneous saccharification and fermentation process, to study its interior rule can be significant for developing an economical, scientific and efficient fermentation process. The simulation of the simultaneous saccharification and fermentation via batch operation was accomplished by Aspen Dynamics software, and the simulation results were compared with that by Aspen Plus. The effects of concentration of glueoamylase and yeast inoculum size were taken into consideration in the batch fermentation process. The simulation model built by Aspen Dynamics software, which has taken charging into account, can accord well with practice even more. After 16 h of fermentation, reaction rate of dextrin reached its maximum, and reaction rate of glucose and ethanol began to flatten after 20 h of fermentation. The optimum usage of glucoamylase is 100 U/g and the yeast inoculum size is 30%.
出处
《计算机与应用化学》
CAS
2015年第9期1075-1080,共6页
Computers and Applied Chemistry
关键词
乙醇
同步糖化
发酵
动态模拟
ethanol
simultaneous saceharification fermentation
Aspen Dynamics
