Modeling drying kinetics of Peruvian yellow potatoes (Solanum gonyocalix)

Gabriela Cristina Chire Fajardo, Rocio Alicia Valdivia Arrunategui, Walter Francisco Salas Valerio

Resumen


The aim of this research was to model drying kinetics of potatoes (Solanum gonyocalix), variety Amarilla Tumbay, using a tunnel dryer.  Potatoes slices of 0,5 cm thickness were used in a drying experiment at different temperatures (60, 70 and 80°C) and air speed (4,9, 6,7 and 8,3 m/s). The equipment used allowed recording of the sample gross mass at real time. A factorial design in CRD with two repetitions was used, to determine significant differences between levels the LSD method was used. The results show two drying speeds (a very short constant one and a decreasing one).  For the marked decreasing speed, which could be modeled by Fick´s law of diffusion, the used equations were adequate for a proper description of the process. Temperature dependence of moisture diffusion was of the Arrhenius equation type (R2 = 0.995): moisture diffusion and activation energy were Do = 0,81x10-9 m2/s and Ea = 4,81 kJ/mol respectively.

Palabras clave


Drying of potatoes; fick´s law of diffusion; potatoe moisture diffusivity; tunnel dryer; yellow potatoe

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Referencias


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DOI: https://doi.org/10.23850/24220582.349

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Revista Colombiana de Investigaciones Agroindustriales

Editor Jefe José Libardo Tapiero Cuellar Ph.D: Líder Grupo de Investigación GICTACAB. José Edinson Escobar Salcedo: Líder SENNOVA - Editor Asociado. Juan Manuel Rubio Vera: Gestor Editorial. Editorial SENA, Centro Agropecuario, Buga. Kilómetro 2, Carretera central vía Buga-Tuluá. Valle del Cauca, Colombia - Teléfono: 57-2-2376300, ext. 23291. E-mail: revistagroindustrial@sena.edu.co

ISSN: 2422-0582  e-ISSN: 2422-4456

DOI: https://doi.org/10.23850/issn.2422-0582