Food Technology and Biotechnology (Jan 2014)

Modelling of Batch Lactic Acid Fermentation in the Presence of Anionic Clay

  • Cosmin Jinescu,
  • Vasilica Alisa Aruş,
  • Oana Cristina Pârvulescu,
  • Ileana Denisa Nistor

DOI
https://doi.org/10.17113/ftb.52.04.14.3553
Journal volume & issue
Vol. 52, no. 4
pp. 448 – 458

Abstract

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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.

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