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Improved growth model for two-stage continuous cultures of Lactobacillus helveticus Electron. J. Biotechnol.
Bouguettoucha,Abdallah; Balannec,Béatrice; Nacef,Saci; Amrane,Abdeltif.
An unstructured model for growth and lactic acid production during two-stage continuous cultures of Lactobacillus helveticus was previously developed. The Verlhust model was considered to describe growth kinetics. Production models was based on modified Luedeking-Piret expressions involving an inhibitory effect for the first stage (seed culture) and a nutritional limitation effect for the second stage (culture). To account for the decrease of the biomass concentration observed in the second stage, the dilution rate Dc was replaced by an exponential term of the dilution rate <img border=0 width=84 height=36 src="http://fbpe/img/ejb/v13n5/a07/image002.gif" align=middle>in the growth and product relations. Contrarily to the previous model, the important...
Tipo: Journal article Palavras-chave: Continuous culture; Growth; Lactic acid fermentation; Substrate limitation; Unstructured models.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500007
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