DRYING KINETICS OF SAFFRON FLORAL BIO-RESIDUES

作者：Alvarruiz A^*; Lorenzo C; Alonso G L; Serrano Diaz J

来源：Italian Journal of Food Science, 2016, 28(4): 639-651.

• saffron
• floral waste
• drying
• thin-layer models

The kinetics of hot-air drying of saffron floral bio-residues was studied at two air-drying temperatures (70 and 90 degrees C) and four air-flow rates (2, 4, 6 and 8 m.s(-1)). No constant-rate drying period was observed during drying. Ten thin-layer drying models and the theoretical Fick's diffusion model were fit by non-linear regression to drying data. Three statistical parameters, Chi-squared, correlation coefficient and relative percentage deviation were used to compare the models. Effective moisture diffusivity, calculated using Fick's diffusion model, was in the range of 0.78-1.86 x 10(-10) m(2).s(-1). According to the statistical parameters, three drying models (the logarithmic, two-term and Midilli-Kucuk models) were equally good to describe the drying curve and fit the data better than the other models. The model constants were independent of air-flow rate. The use of air at 90 degrees C decreased drying time in half compared with drying at 70 degrees C.

• 出版日期2016