Improved phenomenological model for an isothermal winemaking fermentation

• Published in: Food control Vol. 20; no. 10; pp. 887 - 895
• Main Authors: Scaglia, Gustavo J.E., Aballay, Pablo M., Mengual, Carmen A., Vallejo, Martha D., Ortiz, Oscar A.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-10-2009
• Subjects: alcoholic fermentation; batch systems; Biomass; bioreactors; grape must; Isothermal fermentation; mathematical models; microbial activity; microbial growth; Phenomenological model; predictive microbiology; Tracking trajectory; Winemaking; Tracking trajectory; Phenomenological model; Isothermal fermentation; Winemaking
• ISSN: 0956-7135; 1873-7129
• DOI: 10.1016/j.foodcont.2008.12.012

An improved phenomenological model of the varietals must fermentation in a batch bioreactor under controlled bench-scale conditions is presented. The model allows predicting satisfactorily the behavior of the main bioprocess variables to adjust potential deviations from a predefined trajectory. It avoids possible discontinuities when it is used equations like the Blackman’s type for modelling bioprocesses, allowing a more accurate and smooth approximation to the experimental data. The cellular growth term is modeled as a variant of the Verlhurst’s logistic equation. The validation with own and published experimental data and, an exhaustive sensitivity analysis about its properties are presented. The model shows an excellent performance for the main variables and great potential to be used as biomass state estimator into control strategies to avoid abnormal fermentations and, tracks predefined trajectories.