Original scientific paper
https://doi.org/10.17113/ftb.52.04.14.3553
Modelling of Batch Lactic Acid Fermentation in the Presence of Anionic Clay
Cosmin Jinescu
; Politehnica University of Bucharest, Mechanical Engineering Department, 313 Splaiul Independenţei, RO-060042 Bucharest, Romania
Vasilica Alisa Aruş
; Vasile Alecsandri University of Bacău, Chemical and Food Engineering Department, 157 Mărășești, RO-600115 Bacău, Romania
Oana Cristina Pârvulescu
; Politehnica University of Bucharest, Chemical and Biochemical Engineering Department, 1–3 Gheorghe Polizu, RO-011061 Bucharest, Romania
Ileana Denisa Nistor
; Vasile Alecsandri University of Bacău, Chemical and Food Engineering Department, 157 Mărășești, RO-600115 Bacău, Romania
Abstract
Batch fermentation of milk inoculated with lactic acid bacteria was conducted in the presence of hydrotalcite-type anionic clay under static and ultrasonic conditions. An experimental study of the effect of fermentation temperature (t=38–43 °C), clay/milk ratio (R=1–7.5 g/L) and ultrasonic field (ν=0 and 35 kHz) on process dynamics was performed. A mathematical model was selected to describe the fermentation process kinetics and its parameters were estimated based on experimental data. A good agreement between the experimental and simulated results was achieved. Consequently, the model can be employed to predict the dynamics of batch lactic acid fermentation with values of process variables in the studied ranges. A statistical analysis of the data based on a 23 factorial experiment was performed in order to express experimental and model-regressed process responses depending on t, R and ν factors.
Keywords
anionic clay; fermentation; lactic acid; mass transfer; modelling; ultrasound
Hrčak ID:
130925
URI
Publication date:
15.12.2014.
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