Data/hora: 10/06/2024 00:44:21

Provedor de dados: | 69
País: | Chile
Título: | Valorization of raw glycerol for citric acid production by Yarrowia lipolytica yeast
Autores: | Rywinska,Anita; Rymowicz,Waldemar; Marcinkiewicz,Marta.
Data: | 2010-07-01
Ano: | 2010
Palavras-chave: | Citric acid; Fed-batch culture; Yarrowia lipolytica; Raw glycerol.
Resumo: | 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&amp;#8729;L-1, the substrate was added by pulsed additions, and in the other, in which the total glycerol concentration was 300 g&amp;#8729;L-1, the substrate was added at a constant feeding rate of 1.4 g&amp;#8729;h-1. Despite high citric acid concentrations (155.2 and 157.5 g&amp;#8729;L-1 with Y. lipolytica Wratislavia 1.31 and Y. lipolytica Wratislavia AWG7, respectively) obtained from 300 g&amp;#8729;L-1 of glycerol, the yield of citric acid was similar, i.e. about 0.6 g&amp;#8729;g-1. The volumetric citric acid productivity was markedly higher (1.05 and 0.94 g&amp;#8729;L-1h-1 with Y. lipolytica Wratislavia 1.31 and Y. lipolytica Wratislavia AWG7 strains, respectively) in the cultures containing 200 g&amp;#8729;L-1 of carbon source.
Tipo: | Journal article
Idioma: | Inglês
Identificador: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000400009
Editor: | Pontificia Universidad Católica de Valparaíso
Formato: | text/html
Fonte: | Electronic Journal of Biotechnology  v.13 n.4 2010