Growth kinetics of Saccharomyces cerevisiae in batch and fed-batch cultivation using sugarcane molasses and glucose syrup from cassava starch.
J Ind Microbiol
; 16(2): 117-23, 1996 Feb.
Article
em En
| MEDLINE
| ID: mdl-8730575
ABSTRACT
Growth kinetics of Saccharomyces cerevisiae in glucose syrup from cassava starch and sugarcane molasses were studied using batch and fed-batch cultivation. The optimum temperature and pH required for growth were 30 degrees C and pH 5.5, respectively. In batch culture the productivity and overall cell yield were 0.31 g L-1 h-1 and 0.23 g cells g-1 sugar, respectively, on glucose syrup and 0.22 g L-1 h-1 and 0.18 g cells g-1 sugar, respectively, on molasses. In fed-batch cultivation, a productivity of 3.12 g L-1 h-1 and an overall cell yield of 0.52 g cells g-1 sugar were achieved in glucose syrup cultivation and a productivity of 2.33 g L-1 h-1 and an overall cell yield of 0.46 g cells g-1 sugar were achieved in molasses cultivation by controlling the reducing sugar concentration at its optimum level obtained from the fermentation model. By using an on-line ethanol sensor combined with a porous Teflon tubing method in automating the feeding of substrate in the fed-batch culture, a productivity of 2.15 g L-1 h-1 with a yield of 0.47 g cells g-1 sugar was achieved using glucose syrup as substrate when ethanol concentration was kept at a constant level by automatic control.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Saccharomyces cerevisiae
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
J Ind Microbiol
Ano de publicação:
1996
Tipo de documento:
Article