Air-drying of fresh and osmotically pre-treated pineapple slices: Fixed air temperature versus fixed slice temperature drying kinetics


Autoria(s): Nicoleti, J. F.; Telis-Romero, J.; Telis, VRN
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

01/01/2001

Resumo

In this investigation, the air drying characteristics of fresh and osmotically pre-treated pineapple slices in a tray dryer were studied under different operating conditions. The air velocity varied from 1.5 to 2.5 m/s and the air temperature from 40 to 70 degreesC. The analytical solution of the second Fick's law for an infinite slab was used to calculate effective diffusion coefficients and their temperature dependence could be well represented by an Arrhenius-type equation. Comparison of the results showed that the diffusion coefficients were lower for the pre-treated fruit. By means of automatic control, it was possible to obtain drying curves under conditions of constant product temperature, which showed to be an alternative to reduce the drying time of pineapple slices.

Formato

2175-2191

Identificador

http://dx.doi.org/10.1081/DRT-100107493

Drying Technology. New York: Marcel Dekker Inc., v. 19, n. 9, p. 2175-2191, 2001.

0737-3937

http://hdl.handle.net/11449/39999

10.1081/DRT-100107493

WOS:000172553300006

Idioma(s)

eng

Publicador

Marcel Dekker Inc

Relação

Drying Technology

Direitos

closedAccess

Palavras-Chave #activation energy #automatic control #drying rates #effective diffusivity
Tipo

info:eu-repo/semantics/article