Effect of Microwave, Infrared and Freeze Drying Methods on Drying Kinetics, Effective Moisture Diffusivity and Color Properties of Turmeric

Authors : Onur TASKIN, Nazmi IZLI

Pages : 334-345

Doi:10.15832/ankutbd.439434

View : 72 | Download : 11

Publication Date : 2019-09-05

Article Type : Research Paper

Abstract :In the present research, effect of methods that use the microwave insert ignore into journalissuearticles values(90, 160 and 350 W);, infrared insert ignore into journalissuearticles values(60, 70 and 80 °C);,  and freeze drying for turmeric samples on the drying kinetics, effective moisture diffusivity and color were analyzed.  Also ten distinct thin layer models of drying were used to predict their kinetics. Depending on the evaluation of the  statistical tests, models of Midilli et al and Wang & Singh models were found the optimum ones for explaining drying  characteristics of turmeric. Among the used methods, the fastest and slowest drying time was 65 min with microwave  drying insert ignore into journalissuearticles values(350 W); and 600 min with freeze drying, respectively. The calculations demonstrate that the maximum effective  moisture diffusivity value is obtained in microwave drying insert ignore into journalissuearticles values(350 W);. Our study shows that although the freeze-drying  increases the drying time, it showed closest color results against to fresh samples. In conclusion, microwave, infrared  and freeze drying methods applied to turmeric should improve with the combined drying applications.
Keywords : Turmeric, Drying kinetics, Effective moisture diffusivity, Color

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