Abstract
Physical and mathematical models for solid state fermentation were developed, using cultivation of Rhizopus oligosporus on soy beans as an example. A simple mathematical model was developed which predicts the dynamic behaviour of an adiabatic homogeneous packed-bed reactor accurately during the first 40 hours. Biomass measurements and experimental verification of the substrate composition are required to improve model validation. After 40 hours, the simple kinetic model gives very poor predictions. Axial gradients and bed shrinkage make the packed bed with soy beans an unsatisfactory physical model. Based on the problems encountered, the experimental set-up has been modified: agar beads with an oleic acid emulsion are a suitable model substrate; a scraped-drum reactor offers better perspectives than the packed bed for studies of solid-state fermentation.
Resume
A partir de l’exemple de la culture de Rhizopus oligosporus sur grains de soja nous avons développé des modèles physiques et mathématiques de la fermentation solide. Un modèle mathématique simple a été proposé pour décrire le comportement dynamique d’un réacteur homogène, adiabatique à lit compact pendant les premières 40 heures de culture. Des mesures de production de biomasse et des vérifications expérimentales ont été nécéssaires pour valider et afiner le modèle. Après 40 heures, le modèle cinétique simple donne des informations médiocres. Le lit compacté de graines de soja est un modèle physique peu satisfaisant à cause des gradients axiaux et du rétrécissement du lit. Suite à ces problèmes, nous avons modifié les conditions expérimentales: le substrat modèle sélectionné est une émulsion de billes d’agar et d’acide oléique et le réacteur choisi est équipé d’un tambour à racloir. Ce type de réacteur offre de plus larges perpectives pour l’étude de la fermentation solide que celui à lit compacté.
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© 1997 Springer Science+Business Media Dordrecht
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Rinzema, A. et al. (1997). Models for solid-state cultivation of Rhizopus oligosporus . In: Roussos, S., Lonsane, B.K., Raimbault, M., Viniegra-Gonzalez, G. (eds) Advances in Solid State Fermentation. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0661-2_12
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DOI: https://doi.org/10.1007/978-94-017-0661-2_12
Publisher Name: Springer, Dordrecht
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