Polytechnic University of Valencia Congress, 21st International Drying Symposium

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Model of the solutes transfer during osmotic dehydration of vegetal matrices: a proposal
Sahylin Muñiz-Becerá, Lilia Leticia Méndez-Lagunas, Juan Rodríguez-Ramírez, Sadoth Sandoval-Torres

Last modified: 26-12-2018

Abstract


Osmotic dehydration of apple was modeled considering the mechanisms involved in the solutes transfer within the plant matrix: impregnation and diffusion. The model mathematical writing includes the impregnation layer thickness, the diffusion thickness, a water bulk flow and the convective resistance. Apple cylinders were dehydrated at 30, 50 ° C and 30, 50 ° Brix and a motion of 0.15 m/s. The Reynolds number was of 250 for 30°C-30°Bx and 500 for 50°C-50°Bx. Schmidt numbers was of 4000 for 30 ° C-30 ° Bx and 4200 for 50 ° C-50 ° Bx.

Keywords: transfer; solute; impregnation; osmotic dehydration.

 


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