| 摘要 |
<p>PURPOSE:To prepare high concentration ethanol, by bringing fixed yeast into contact and reacting with a medium comprising a nutrient necessary for the propagation of the yeast in a gel carrier and a fermentable sugar as a raw material of ethanol formation. CONSTITUTION:Fixed yeast, which has formed concentrated mycelium layer on the parts near the surface of a gel carrier, is brought into contact and reacted with a nutrient medium so that a fermentable sugar is assimilated to prepare ethanol. When the sugar concentration of the reaction solution is lowered, for example, to about not more than 20wt% of the initial sugar concentration, preferably about not more than 10mg/ml, the fermentable sugar is supplised. Thus, the repetition of the supply of the fermentable sugar at the stage of the decrease of sugar concentration in the reaction solution can produce ethanol having a high concentration of about 200mg/ml at the maximum. A method wherein a feed opening is formed on a part at the top of an inverted cone column and an outlet for the solution after reaction is set at its bottom can be applied.</p> |
