MODELLING OF SUGAR TRANSFER DURING OSMOTIC DEHYDRATION OF CARROTS

Mass transfer was quantitatively investigated during osmotic dehydration of carrot slices and layers. The distribution of water and sugar was determined in longitudinal and radial directions of root samples. Using the solution of Fick´s I. and II. laws the effective diffusion coefficients of sugar depending on geometric parameters in radial layers and longitudinal slices were estimated according to cylindrical and rectangular coordinate systems. The observed dependency of Dr,s and Dl,s was found to be in line with the absence of alteration in longitudinal and the existing difference in radial directions of the tissue structure in carrot root