To provide an apparatus and a method for producing ethanol that are suitable for the circulating use of an enzyme.
The apparatus includes a vacuum distillation tower 11 into which an ethanol-fermented liquid produced by saccharification fermentation of a biomass raw material is introduced and in which the ethanol-fermented liquid is distilled in a state of the internal pressure being lower than atmospheric pressure, to distill ethanol vapor that contains water vapor, and to take out an enzyme-containing concentrated waste liquid recycled for saccharification fermentation of the biomass raw material, and a rectification tower 12 for rectifying the ethanol vapor distilled from the vacuum distillation tower 11. In this case, the energy of the ethanol vapor can be utilized more efficiently if a first compressor 16 is provided for adiabatically compressing the ethanol vapor distilled from the vacuum distillation tower 11, and the ethanol vapor adiabatically compressed by the first compressor 16 is introduced into the rectification tower 12.
HIDAKA RYOTA
ISHIBASHI YOICHI
SUMI TOMONORI
KATO YASUHIKO
KANSHA YASUKI
TSUTSUMI ATSUSHI
UNIV TOKYO
| JP2010017084A | 2010-01-28 | |||
| JP2009011198A | 2009-01-22 | |||
| JP2008536503A | 2008-09-11 | |||
| JP2005065695A | 2005-03-17 | |||
| JP2002345495A | 2002-12-03 |
Takayuki Imanaka
Yoshihiro Kurita