Pilot-scale ethanol fermentation by Zymomonas mobilis from simultaneously saccharified sago starch

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Title
Pilot-scale ethanol fermentation by Zymomonas mobilis from simultaneously saccharified sago starch
Author(s)
Chul Ho Kim; Z Abidin; C C Ngee; Sang Ki Rhee
Bibliographic Citation
Bioresource Technology, vol. 40, no. 1, pp. 1-6
Publication Year
1992
Abstract
A simultaneous saccharification of sago starch and ethanol fermentation (SSF), by an enzyme, amyloglucosidase, and a bacterium, Zymomonas mobilis, was studied at pilot-scale. Various SSF processes were performed in batch and semi-batch modes. In the batch SSF processes using a 72 litre stirred-tank fermentor, the final ethanol concentration obtained from 20% (w/w) sago starch was 92.6g litre-1 with 97.4% of the theoretical ethanol yield. In 100 and 500 litre airlift fermentors equipped with systems for self-mixing by C02 recycle the fermentation kinetics were similar to those obtained from the stirred-tank fermentor. Semi-batch SSF processes using a cell-recycle system by ultrafiltration gave about 80% increase of ethanol productivity compared with batch SSF processes.
Keyword
starchzymomonas mobilisfermentationchemical plants - pilot plantsethanol - biosynthesissugars - fermentationsago starch
ISSN
0960-8524
Publisher
Elsevier
DOI
http://dx.doi.org/10.1016/0960-8524(92)90111-A
Type
Article
Appears in Collections:
Jeonbuk Branch Institute > Microbial Biotechnology Research Center > 1. Journal Articles
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