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Influence of osmotic pre-treatment on convective drying of yellow pitahaya

Ayala-Aponte, Alfredo and Serna-Cock, Liliana and Libreros-Triana, Jimena and Prieto, Claudia and Di Scala, Karina (2014) Influence of osmotic pre-treatment on convective drying of yellow pitahaya. Dyna; Vol. 81, núm. 188 (2014); 145-151 DYNA; Vol. 81, núm. 188 (2014); 145-151 2346-2183 0012-7353 .

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URL oficial: http://revistas.unal.edu.co/index.php/dyna/article...

Resumen

Cylinders of pitahayas were osmotically dehydrated in sucrose 55 % (w/w) during 45 minutes as a pretreatment of convective drying. Hot air drying was performed at 50, 60 and 70ºC. Drying kinetics of osmodehydrated samples was compared to untreated samples. Effective moisture diffusion coefficients were determined. Values of activation energy were 29.56 and 16.93 kJ mol-1 for pretreated samples and untreated samples, respectively. Mathematical modeling was applied to simulate the experimental drying curves of pitahayas. Results indicated that the Weibull model could be used to simulate experimental drying data. Furthermore, shrinkage of samples due to changes in volume was more pronounced for fruits dehydrated without pretreatment.

Tipo de documento:Artículo - Article
Información adicional:Derechos de autor reservados
Palabras clave:drying kinetics, effective diffusion coefficient, mathematical modelling, shrinkage, pitahayas.
Unidad administrativa:Revistas electrónicas UN > Dyna
Código ID:46850
Enviado por : Dirección Nacional de Bibliotecas STECNICO
Enviado el día :07 Febrero 2015 08:56
Ultima modificación:07 Febrero 2015 08:56
Ultima modificación:07 Febrero 2015 08:56
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