Effects of osmotic pre-treatment on convective drying kinetics of nectarines halves (Pyrus persica L.)
2011
Pavkov, I., Faculty of Agriculture, Novi Sad (Serbia) | Babić, Lj., Faculty of Agriculture, Novi Sad (Serbia) | Babić, M., Faculty of Agriculture, Novi Sad (Serbia) | Radojčin, M., Faculty of Agriculture, Novi Sad (Serbia) | Stojanović, Č., Semberija a.d., Bijeljina – Novo Selo (Bosnia and Herzegovina)
Measuring changes in moisture content of halves, during the drying was done to assess the influence of pre-treatment, temperature and drying air velocity l on the kinetics of convective drying nectarine varieties Fantasia. Based on the results of dispersion analysis three -factors experiment, the statistical probability of 99% rated it applied. Pre-treatment and selected levels of air temperature affect the drying kinetics. Selected levels of air velocity in front of layers of material within the tested range, and mutual interaction between the factors are less influential on the kinetics. A careful analysis of the results moisture changes during the drying time (kinetic drying curves) there has been a light influence of chosen level of drying rate on the kinetics, but less pronounced. With the increase of air temperature and drying air velocity for drying outside layer of the material increases and the drying rate. Using osmotic dehydration as pre-treatment lowers the rate of convective drying process for forming a relationship of adsorption of moisture, solvent and dry matter in the tissue of nectarine halves. The newly-formed links cause the increase in value of equilibrium moisture osmotic treated materials, and rapid achievement of equilibrium moisture. Seen from the aspect of the total drying time for a final product, more quickly achieve equilibrium moisture content apparently excludes the negative effect of osmotic pre-treatment on the kinetics of convective drying nectarine halves.
显示更多 [+] 显示较少 [-]