THIN LAYER DRYING STUDY OF ACORNS (Quercus ilex L.) -NEW MATHEMATICAL MODELLING APPROACH

Mahmoud TRACHI; Hind  Magaz; Roumaissa  Mahsas

doi:10.4314/jfas.1265

Authors

Mahmoud TRACHI Department of Process Engineering, Faculty of Technology, M’hamed Bougara University, Boumerdes, 35000, Algérie
Hind Magaz Department of Process Engineering, Faculty of Technology, M’hamed Bougara University, Boumerdes, 35000, Algérie
Roumaissa Mahsas Department of Process Engineering, Faculty of Technology, M’hamed Bougara University, Boumerdes, 35000, Algérie

DOI:

https://doi.org/10.4314/jfas.1265

Keywords:

kinetic; moisture; mathematical model; traditional couscous.

Abstract

The thin layer drying behaviour of acorns was investigated at three oven temperatures (60, 70 and 80 °C). The drying kinetic was fitted and modelled using different mathematical drying models. The use of First-Order (FO) and Pseudo-First-Order (PFO) was proposed and estimated for describe the moisture content evolution of acorns as a function of time. According the coefficient of determination (R²), the root mean square error (RMSE) and the sum mean of square error (c²), the best fit was given by the Logarithmic model. A good fit (R² > 0.9942; RMSE < 2.238 and c² < 6.014) was shown by FO and PFO indicating their aptitude to describe the thin layer drying kinetic of acorns. Effective moisture diffusivity increased from 4.016´10^-⁸ to 1.244´10^-⁷ m² s^-¹ with the rice of drying temperature. The elimination of water from the acorns requires an activation energy of about 55 kJ mol^-¹.

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THIN LAYER DRYING STUDY OF ACORNS (Quercus ilex L.) -NEW MATHEMATICAL MODELLING APPROACH

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