Aplicación del modelo de Peleg en la deshidratación osmótica al vacío de Smallanthus sonchifolius

The applicability of Peleg model to predict mass transfer kinetics during the osmotic dehydration (OD) process of yacon was investigated by using 3 different concentrations of sucrose solution, 3 vacuum pressures, 3 temperatures and 9 times. When analyzing the effect on solids gain, it shows a linear effect over time, while the other parameters show quadratic effects. Similarly, the loss of water continues to have a linear trend as a function of time, while for the other parameters there is a decreasing behavior as temperature, concentration and pressure increase. The equilibrium values predicted by the Peleg equation were very close to the experimental ones, with values of R2>0.98. Regarding the Peleg's rate constants, the results showed that that K1 was significantly (p<0.05) affected as the concentration of … and the temperature were increased. With regard to K2, this constant was significantly affected (p<0.05) by increasing the values of the three studied parameters, probably due to the phenomena of cellular relation because of the effect of pressure with the consequent increase of the volume.