Determination of the drying and rehydration kinetics of freeze dried kiwi (Actinidia deliciosa) slices

作者：Ergun Kadriye; Caliskan Gulsah^*; Dirim Safiye Nur

来源：Heat and Mass Transfer, 2016, 52(12): 2697-2705.

DOI：10.1007/s00231-016-1773-x

The aim of this study was to determine the drying and rehydration kinetics of freeze dried kiwi slices. Well-known thin layer drying models (Lewis, Page, Modified Page I, Henderson and Pabis, Modified Henderson and Pabis, Logarithmic, Midilli, Modified Midilli, Two-term, Two-term Exponential, Modified Two-term Exponential, and Wang and Singh) were fitted to the experimental data. A nonlinear regression analysis was used to evaluate the parameters of the selected models using statistical software SPSS 16.0. For the freeze drying process of the kiwi slices, the highest R-2 value (0.997), and the lowest RMSE (0.018) as well as the chi(2) (0.0004) values were obtained from the Two-term Exponential model. The effective moisture diffusivity (D-eff) of the freeze dried kiwi slices was calculated with the Fick's diffusion model as 7.302 x 10(-10) m(2)/s. The rehydration behavior was determined using distilled water at different solid-liquid ratios at room temperature (18 +/- 1 A degrees C) using Peleg's model. The kinetics of the total soluble solid loss was also determined.

• 出版日期2016-12