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Fast Production of Ethanol by Zymomonas mobilis (Zy-1)(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2007 Vol.13 No.1
Page:
69-72
Research Field:
Reviews
Publishing date:

Info

Title:
Fast Production of Ethanol by Zymomonas mobilis (Zy-1)
Author(s):
LIU Yanet al.
Keywords:
Keywords Zymomonas mobilis bacterial fermentation ethanol mutant rice flour cassava flour sweet potato
CLC:
-
PACS:
DOI:
-
DocumentCode:

Abstract:
Abstract A good condition for fermenting glucose into, ethanol by Zymomonas mobilis (Zy) was achieved. Under the condition, its mutant (Zy1) was more capable of producing ethanol than its original strain. When glucose concentration was 200 g L-1, the ethanol concentration was 96.5 g L-1 and stoichiometric yield was 94.42% by Zy1 fermentation for 48 h. In addition, as Zy1 fermented raw materials, such as rice flour, cassava flour and sweet potato into ethanol under the optimum condition, the ethanol concentration could be over 95 g L-1 and stoichiometric yield above 92%, with fermentation time of 44 h. The sugar concentration in fermentation liquor was measured by the DNS method. The reducing sugar was about 2 g L-1, but residual sugars were different owing to different raw materials (from 5 g L-1 to 20 g L-1).The analysis by thinlayer chromatogram indicated that in the fermentation liquor there was no glucose, but there were disaccharide and trisaccharide. Fig 2, Tab 5, Ref 12

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Last Update: 2007-03-06