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Date of Publication:2015-01-01

Journal:中国科学 化学

Affiliation of Author(s):生物工程学院

Volume:45

Issue:5

Page Number:547-557

ISSN No.:1674-7224

Abstract:In order to solve the high energy consumption of fuel ethanol production
   and wastewater treatment, a new technology of sugaring-out ethanol
   extraction from broth coupled with ethanol fermentation using raffinate
   phase was presented. Ethanol recovery reached 70% in both simulated
   ethanol fermentation broth and actual broth using one time sugaring-out
   extraction, while the initial concentrations of glucose, butanol and
   ammonium sulfate were 10%, 30%, and 2%, respectively. The influence of
   raffinate phase on ethanol fermentation was also investigated, and its
   showed that after butanol concentration decreased to 6.5 g/L by CO_2
   stripping of raffinate phase, the raffinate phase could be recycled as
   backset. Along with the increase of raffinated phase cycle numbers,
   ethanol fermentation time, ethanol concentration and yield were
   prolonged and decreased, which indicated that sugaring-out ethanol
   extraction from broth coupled with ethanol fermentation need to be
   further improved.

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