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Drying kinetics of pre-osmosed fresh water frog (<i>Dicroglossus Occipitalis</i>)


W Burubai
I Bratua

Abstract

The drying kinetics of frog (Dicroglossus occipitalis) was conducted using convective oven dryer. The results were fitted into three thin-layer models; Lewis, Henderson and Page models. The constants and coefficients of the various models used were evaluated using non-linear regression methods, and the results show that the Henderson model is the best for predicting the drying behaviour of frog and was followed by Lewis model. Furthermore, the drying was discovered to have taken place during the falling rate period and the effective moisture diffusivity was determined using Ficks second law and the values ranged from 8.094x10-8m2/s to 1.102x10-6m2/s. The temperature dependence of effective moisture diffusivity obeyed the Arrhenius Law with activation energy of 45.6kJ/mol.

 

http://dx.doi.org/10.4314/njt.v35i4.31


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eISSN: 2467-8821
print ISSN: 0331-8443