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Indian Journal of Biotechnology (IJBT) >
IJBT Vol.08 [2009] >
IJBT Vol.08(4) [October 2009] >
| Title: | A comparative study on citric acid production kinetics of two Yarrowia lipolytica strains in two different media |
| Authors: | Yalcin, S Karasu
Bozdemir, M T
Ozbas, Z Y |
| Keywords: | Batch fermentation
citric acid
growth kinetics
production kinetics
Yarrowia lipolytica
yeast |
| Issue Date: | Oct-2009 |
| Publisher: | CSIR |
| Abstract: | Microbial production of citric acid was performed by Yarrowia lipolytica NBRC 1658 and a domestic strain
in the media containing glucose or fructose as substrates. The study was
carried out in a batch system. The non-competitive substrate inhibition model
was proposed for growth of the yeasts in both substrate media. Higher dry mass
and lower Ks values were obtained in glucose media when compared to
fructose media. The highest citric acid concentration (65.1 g/L) was obtained
with the domestic strain in the medium containing 200 g/L fructose. In the
media containing fructose, maximum citric acid concentration and productivity
values determined with the domestic strain were aproximately two-fold greater
than those obtained with NBRC 1658 strain. The required initial concentration
of glucose or fructose at which best citric acid production properties were
observed changed between 100-200 g/L for both of the strains. The ratio of
citric acid to isocitric acid was found to change between 11.70-16.62 |
| Page(s): | 408-417 |
| ISSN: | 0975-0967 (Online); 0972-5849 (Print) |
| Source: | IJBT Vol.08(4) [October 2009]
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