Drying Kinetics of Curcuma longa Rhizomes |
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| Authors: | Antonio,Mulet ,Miguel,Blasco ,José ,Garcí a-Reverter José v.,Garcí a-Pé rez |
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| Affiliation: | Authors Mulet and García-Pérez are with Dept. de Tecnología de Alimentos, Univ. Politécnica de Valencia, Camino de Vera s/n, E46022, Valencia, Spain. Authors Blasco and García-Reverter are with ainia, Centro tecnológico, Parque Tecnológico de Valencia, Paterna, Spain. Direct inquiries to author Mulet (E-mail: ). |
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| Abstract: | ABSTRACT: Modeling drying kinetics is very useful for optimization purposes. Hot air drying kinetics were carried out in monolayer at different temperatures (60°C, 70°C, 80°C, 90°C, and 100°C) and for different sample types (peeled and unpeeled rhizomes of different sizes). Mathematical models based on Fick's law were used to describe water removal, considering different boundary conditions and geometries. Effective moisture diffusivities identified from modeling presented an Arrhenius-type relationship. An additional mass transfer resistance was identified as due mainly to the peridermis layer (peridermial resistance). The accuracy of the model assuming peridermial resistance only in the radial direction and solved using the finite differences method was illustrated, and the mass transfer coefficient was identified (k = 9.7 × 10-5 kg water/m2/s). Keywords: Curcuma longa , drying, modeling, peridermial resistance |
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