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Journal of Pharmacognosy and Phytochemistry

Journal of Pharmacognosy and Phytochemistry

Vol. 7, Special Issue 4 (2018)

Impact of process variables on effective moisture diffusivity during convective drying of Osmotically dehydrated mushroom samples

Author(s):

Birendra Kr. Mehta, Surabhi, Amrit Kr. Jha, Maya Kumari and Sanjay Kr. Jain

Abstract:
The drying characteristics of osmosed mushroom slices were investigated in an experimental axial flow dryer at various air temperatures of 45, 55, 65, 75 and 85<sup>o</sup>C and velocity of air such as 1.0, 1.5 and 2.0 m/s. The entire drying process took place in the falling rate period. Effective moisture diffusivity (D<sub>eff</sub>) was determined for examined temperatures and velocities using Fick’s second law of diffusion adapted to slab geometry. The calculated effective moisture diffusivity of osmo-convectively dried mushroom samples varied considerably with moisture content and air drying temperature from 1.39 x 10<sup>-9</sup> to 4.67 x 10<sup>-9</sup>, 1.44 x 10<sup>-9</sup> to 4.81 x 10<sup>-9</sup> and 1.57 x 10<sup>-9</sup> to 4.92 x 10<sup>-9</sup> m<sup>2</sup>/s for air velocity of 1.0, 1.5 and 2.0 m/s, respectively. Activation energy was also calculated and found to be 26.69, 27.91 and 29.26 kJ/mol for 1.0, 1.5 and 2.0 m/s air velocity respectively.

Pages: 312-317  |  752 Views  82 Downloads

How to cite this article:
Birendra Kr. Mehta, Surabhi, Amrit Kr. Jha, Maya Kumari and Sanjay Kr. Jain. Impact of process variables on effective moisture diffusivity during convective drying of Osmotically dehydrated mushroom samples. J Pharmacogn Phytochem 2018;7(4S):312-317.