| Revista: | Electronic journal of biotechnology |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000336081 |
| ISSN: | 0717-3458 |
| Autores: | Bouguettoucha, Abdallah1 Balannec, Béatrice2 Nacef, Saci2 Amrane, Abdeltif2 |
| Instituciones: | 1Universite Ferhat Abbas, Faculte des Sciences de l’Ingenieur, Setif. Argelia 2Universite de Rennes, Ecole Nationale Superieure de Chimie de Rennes, Rennes, Ille-et-Vilaine. Francia |
| Año: | 2010 |
| Periodo: | Sep |
| Volumen: | 13 |
| Número: | 5 |
| País: | Chile |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | 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 in the growth and product relations. Contrarily to the previous model, the important decrease of the biomass concentration observed at steady state in the second stage at high dilution rates, namely close to wash out, was correctly described by the new model. It also proved to satisfactory describes production data and volumetric productivity |
| Disciplinas: | Biología |
| Palabras clave: | Biotecnología, Fermentación, Cultivo continuo, Limitación de sustrato, Acido láctico, Cinética de crecimiento, Lactobacillus helveticus |
| Keyword: | Biology, Biotechnology, Fermentation, Continuous culture, Substrate limitation, Lactic acid, Growth kinetics, Lactobacillus helveticus |
| Texto completo: | Texto completo (Ver PDF) |
