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Valorization of raw glycerol for citric acid production by Yarrowia lipolytica yeast
Rywinska, Anita; Rymowicz, Waldemar; Marcinkiewicz, Marta.
  • Rywinska, Anita; Wroclaw University of Environmental and Life Sciences. Faculty of Food Science. Department of Biotechnology and Food Microbiology. Wroclaw. PL
  • Rymowicz, Waldemar; Wroclaw University of Environmental and Life Sciences. Faculty of Food Science. Department of Biotechnology and Food Microbiology. Wroclaw. PL
  • Marcinkiewicz, Marta; Wroclaw University of Environmental and Life Sciences. Faculty of Food Science. Department of Biotechnology and Food Microbiology. Wroclaw. PL
Electron. j. biotechnol ; 13(4): 9-10, July 2010. ilus, tab
Article in English | LILACS | ID: lil-577114
ABSTRACT
In the present report, citric acid production from raw glycerol in two fed-batch systems by acetate negative-mutants of Yarrowia lipolytica Wratislavia 1.31 and Wratislavia AWG7 was compared. In the system, in which the total glycerol concentration was 200 g∙L-1, the substrate was added by pulsed additions, and in the other, in which the total glycerol concentration was 300 g∙L-1, the substrate was added at a constant feeding rate of 1.4 g∙h-1. Despite high citric acid concentrations (155.2 and 157.5 g∙L-1 with Y. lipolytica Wratislavia 1.31 and Y. lipolytica Wratislavia AWG7, respectively) obtained from 300 g∙L-1 of glycerol, the yield of citric acid was similar, i.e. about 0.6 g∙g-1. The volumetric citric acid productivity was markedly higher (1.05 and 0.94 g∙L-1h-1 with Y. lipolytica Wratislavia 1.31 and Y. lipolytica Wratislavia AWG7 strains, respectively) in the cultures containing 200 g∙L-1 of carbon source.
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Full text: Available Index: LILACS (Americas) Main subject: Citric Acid / Yarrowia / Glycerol Language: English Journal: Electron. j. biotechnol Journal subject: Biotechnology Year: 2010 Type: Article / Project document Affiliation country: Poland Institution/Affiliation country: Wroclaw University of Environmental and Life Sciences/PL

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Full text: Available Index: LILACS (Americas) Main subject: Citric Acid / Yarrowia / Glycerol Language: English Journal: Electron. j. biotechnol Journal subject: Biotechnology Year: 2010 Type: Article / Project document Affiliation country: Poland Institution/Affiliation country: Wroclaw University of Environmental and Life Sciences/PL