Dehydration Characteristics and Mathematical Modeling of Thyme Leaves using the Microwave Process

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Issa Loghmanieh
Issa Loghmanieh
2
Hossein Bakhoda
Hossein Bakhoda
1 Islamic Azad University science and research branch, Tehran, Iran

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Thyme leaves (Thymus vulgaris) with 50 g weight and 83.7% humidity on wet basis were dried in a laboratory scale microwave dryer using six different microwave power levels ranging between 200 to 700 W. The effect of drying power microwave on the coefficients of the best moisture ratio model was determined by non-linear regression method. Results from the mathematical modeling showed that the Midilli et al. model gave the best fit to describe the drying curve of thyme. In addition, the effective diffusivities of thyme under microwave drying were obtained from 2.94×10-7 to 7.38×10-7 m2/s. Also, the activation energy for the moisture diffusion was found to be 16.471 W/g.

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No external funding was declared for this work.

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The authors declare no conflict of interest.

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No ethics committee approval was required for this article type.

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Issa Loghmanieh. 2014. \u201cDehydration Characteristics and Mathematical Modeling of Thyme Leaves using the Microwave Process\u201d. Global Journal of Science Frontier Research - A: Physics & Space Science GJSFR-A Volume 13 (GJSFR Volume 13 Issue A8): .

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GJSFR Volume 13 Issue A8
Pg. 15- 21
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Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

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February 14, 2014

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English

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Thyme leaves (Thymus vulgaris) with 50 g weight and 83.7% humidity on wet basis were dried in a laboratory scale microwave dryer using six different microwave power levels ranging between 200 to 700 W. The effect of drying power microwave on the coefficients of the best moisture ratio model was determined by non-linear regression method. Results from the mathematical modeling showed that the Midilli et al. model gave the best fit to describe the drying curve of thyme. In addition, the effective diffusivities of thyme under microwave drying were obtained from 2.94×10-7 to 7.38×10-7 m2/s. Also, the activation energy for the moisture diffusion was found to be 16.471 W/g.

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Dehydration Characteristics and Mathematical Modeling of Thyme Leaves using the Microwave Process

Issa Loghmanieh
Issa Loghmanieh Islamic Azad University science and research branch, Tehran, Iran
Hossein Bakhoda
Hossein Bakhoda

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