| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Outline of Final Research Achievements |
Ethanol fermentation have to be performed for production bioethanol from lignocellulosic biomass. Although this step is mainly performed by yeast, the progress of fermentation is inhibited by various factors. The inhibitors include ethanol and heat generated by fermentation. Although yeast has a tolerance at low concentrations of ethanol, yeast is inhibited at high concentration ethanol. If yeast has tolerance of high concentration ethanol, fuel production will be high efficiency. Therefore, to produce yeast of ethanol tolerance, we analyzed the reaction characteristics of yeast to high concentration of ethanol. Furthermore, in order to produce high concentration of ethanol, fermentation has to perform by high concentration of glucose, which is a substrate, we also analyzed effect of high concentration glucose on yeast fermentation. The effect of these ethanol and heat on yeast growth and fermentation was fitted to Monod and Michaelis-Menten equation to determine various parameters.
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