Abstract: In order to improve the deep processing technology and drying process of freshwater fish such as grass carp, the characteristics of microwave drying and hot air drying of grass carp fillets were studied, and the best drying model was determined. The results show that when the microwave drying equipment is raised from 200 W to 800 W, the effective water diffusion coefficient increases from 0.995 4 × 10 - 9 m2 / s to 2. 344 3 × 10 - 9 m2 / s; when the hot air drying temperature When the temperature rises from 60 °C to 80 °C, the effective water diffusion coefficient increases from 4.001 4 ×10 - 10 m2 / s to 7.291 2 × 10 - 10 m2 / s, but the value is still lower than the moisture diffusion during microwave drying. Coefficient value.
The experimental data were fitted by a common thin-film drying model. By comparing the correlation coefficient R2, the square of the residue and the RSS and the chi square χ2, the Page model had the highest microwave drying fit for the grass carp fillets, and the Two term model. The hot air drying process of grass carp fillets has the highest fitting degree.
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