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Abstract:
D-Glyceric acid (D-GA) is a promising chemical for minimizing the toxic effect of acetaldehyde. It has been successfully produced by bioprocesses using glycerol as a substrate. However, high concentrations of glycerol are not beneficial for cell growth. A two-step culture strategy was employed to deal with the ambivalent culture conditions between the growth of Acetobacter tropicalis and the biosynthesis of D-GA. The first stage focuses on biomass accumulation with low initial glycerol concentration; the second stage provides D-GA accumulation through whole-cell biocatalysis. Approximately 2-fold of D-GA yield and 4.5-fold of D-GA productivity were gained by the two-step culture strategy compared to the traditional fermentation with 150 g L-1 of glycerol. Our results also showed that A. tropicalis was able to catalyze the conversion of glycerol to D-GA in the presence of up to 10 % methanol. These findings have important implications to enhance D-GA yield by strategy optimization and reduce its cost.
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CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY
ISSN: 0352-9568
Year: 2018
Issue: 1
Volume: 32
Page: 135-140
0 . 8 5 9
JCR@2018
1 . 6 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
ESI HC Threshold:209
JCR Journal Grade:4
CAS Journal Grade:4
Cited Count:
SCOPUS Cited Count: 5
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2
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