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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 69, No. 2, 2009, pp. 171-178
Bioline Code: cj09020
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 69, No. 2, 2009, pp. 171-178

 en Kinetic Study of convective drying of blueberry variety O'neil ( Vaccinium corymbosum check for this species in other resources L.)
Vega-Gálvez, A A.; Lemus-Mondaca, R R.; Tello-Ireland, C C.; Miranda, M M. & Yagnam, F F.

Abstract

The aim of this research was to study and to model the drying kinetics of the blueberry ( Vaccinium corymbosum check for this species in other resources L.) at three temperatures (60, 70 and 80 ºC) with an airflow of 2.0 ± 0.2 m s -1 . Modeling of the desorption isotherm was carried out with the GAB (Guggenheim, Anderson and de Boer) equation, showing a good fit to experimental moisture data, giving as a result a monolayer moisture level of 0.084 g water g -1 dm. Newton, Henderson-Pabis, Page, Modified Page and Logarithmic mathematical models were applied in the study and in the modeling of the drying kinetics of this fruit. Kinetic parameters k of each model showed dependence on temperature, and were evaluated by an Arrhenius-type equation, with an activation energy of between 36.2 and 54.5 kJ mol -1 . Logarithmic and Modified Page models gave the best fits for each drying curve, based on the statistical test determination coefficient, sum square error, root mean sum errors and Chi-square. In consequence, both models are excellent tools for estimating the drying time of this product.

Keywords
blueberry, GAB, drying, modeling, statistical tests.

 
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