Experimental Study and Mathematical Modeling of the Osmotic Drying Process

Document Type: Full article

Authors

Faculty of Chemical Engineering, Babol University of Technology, Babol, Iran

Abstract

ne"> The osmotic dehydration of three agricultural products including carrot, zucchini and turnip has been studied in this research. The effect of several factors including temperature, sample to osmotic solution weight ratio and the concentration of the osmotic solutes on the osmotic dehydration of these agricultural products were investigated experimentally. The experimental studies consist of two different concentrations (10%, and 20 W/W% for carrots, 30%, and 50 W/W% for zucchini and 40%, and 50 W/W% for turnips), two different vegetable/solution weight to weight ratios (1:10 and 1:15 for all materials) and two different temperatures (30°C and 50°C for carrots and zucchini and 40°C and 50°C for turnips). Three dietary coatings including pectin, carboxymethyl cellulose and corn starch have been selected to control the solids uptake during the osmotic process. The Azuara model proved to be the most accurate correlation to describe the kinetics of the osmotic dehydration of these three agricultural products. The root mean square error of the Azuara model for solid gain in different conditions was between 0.014 and 0.065 for carrots, 0.011 and 0.030 for zucchini and 0.008 and 0.014 for turnips. The root mean square error of the Azuara model for water loss in different conditions was between 0.008 and 0.016 for carrots, 0.003 and 0.008 for zucchini and 0.009 and 0.017 for turnips.

Keywords

Main Subjects


[1]        Movagharnejad, K. and Nikzad, M., "Modeling of tomato drying using artificial neural network Comput", Electron. Agric., 59, 78 (2007).

[2]        Yadollahinia, A. Latifi, A. and Mahdavi, R., "New method for determination of potato slice shrinkage during drying", Comput. Electron. Agric., 65, 268 (2009).

[3]        Bolin, H. R., "Effects of osmotic agents and concentration on fruit quality", Food Sch., 48, 202 (1983).

[4]        Singh, S. Shivhare, U. S. Ahmed, J. and Raghavan, G. S. V., "Osmotic concentration kinetics and quality of carrot preserve", Food Resear. Intern., 32, 509 (1999).

[5]        Sereno, A. M. Moreira, R. and Martinez, E., "Mass transfer coefficients during osmotic dehydration of apple in single and combined aqueous solutions of sugar and salt", Journ. Food Engin., 47, 43 (2001).

[6]        Fernandes, F. Rodrigues, S. Gaspareto, O. and Oliveira., E., "Optimization of osmotic dehydration of bananas followed by air-drying", Journ. Food Engin., 77 ,188 (2006)

[7]        Raoult-Wack, A. L., "Recent advances in the osmotic dehydration of foods", Trends. Food Sci. Technol., 5, 255 (1994).

[8]        Tavakolipour, H. and Zirijany, L., "Banana chips production by hot air and microwave dehydration methods: A comparative study", Middle-East J.  Sci. Res., 21 (10), 1828 (2014).

[9]        Tortoe, C., "A review of osmo dehydration for food industry", Food Sci., 4, 303 (2010).

[10]      Zhou, W. Khin, M. and Perera, C. O., "A study of the mass transfer in coated potato cubes", Food Engin., 77, 84 (2006).

[11]      Levic, L. Koprivca, G. Misljenovic, N. Filipcev, B. Smurina, O. and  Kuljanin, T., "Effect of starch as an edible coating material on the process of osmotic dehydration of carrot in saccharose solution and sugar beet molasses", Acta. Periodica Technol., 39, 29 (2008).

[12]      Khin, M. Zhou, W. and Perera, C., "Study of the mass transfer in osmotic dehydration of coated potato cubes", J. Food Eng., 77, 4 (2006).

[13]      Lazaris, H. N. Mitrakas, G. E. and Matsos, K. I., "Edible coating counter-current product solution contacting, A novel approach to monitoring solids uptake during osmotic dehydration of a model food system",  J. Food Eng., 82 , 171 (2007).

[14]      Lenart, A., "Osmo-convective drying of fruits and vegetables: technology application", Drying Technol., 14, 391 (1996).

[15]      Azuara, E. Cortes, R. Garcia, H. S. and  Beristain, C. I., "Kinetic model for osmotic dehydration and its relationship with Fick's second law", Food Sci. Technol., 27, 409 (1992).

[16]      Hawkes, J. and Flink, J. M., "Osmotic concentration of fruit slices prior to freeze dehydration", Food ProcPreserv., 2, 265 (1978).

[17]      Soti, M. Sahary, M. and Emam djomeh, Z., "Peaches slices production process optimization using osmosis", Iran. J. Agric. Sci., 34, 283 (2003).

[18]      Lazarides, H. N. and Mavroudis. N. F., "Kinetics of osmotic dehydration of a highly shrinking vegetable tissue in a salt-free medium", J. Food Eng., 30, 61 (1996).

[19]      Agarry, S. E. Yusuf, R. O. and Owabor, C. N., "Mass transfer in osmotic dehydration of potato: a mathematical model approach", Eng .App. Sci., 3, 190 (2008).

[20]      Ispir, A. and Togrul, I. T., "Osmotic dehydration of apricot, kinetics and the effect of process parameters", Chem. Eng. Res. Des., 87, 166 (2009).

[21]      Pointing, J. D., "Osmotic dehydration of fruits, recent modifications and applications", Process Biochem., 8, 12(1973).

[22]      Pokharkar, S. M., "Kinetic model for osmotic dehydration of green peas prior to air-drying", Food Sci. Tech., 38, 557 (2001).

 [23]     Rastogi, N. K. and Raghavarao, K. S., "Mass transfer during osmotic dehydration of pineapple: Fickian diffusion in cubical configuration" LWT-Food Sci. Technol., 37, 43 (2004).

[24]      Ertekin, F. K. and Cakaloz, T., "Osmotic dehydration of peas, I. Influence of process variables on mass transfer", Food Process. Preserv., 20, 87 (1996).

[25]      Karthanos, V. T.  Kastaropoulus, A. E. and Saravacos, G. D. "Air drying behavior of osmotically dehydrated fruits", Drying Technol., 13, 1503 (1995).

[26]      Crank, J. Mathematics of diffusion. 2nd ed., Oxford University Press, London, (1975).

[27] Abbasy, B. Ghaffary, A. and Bayat, Y., "Mathematical modeling of mass transfer in osmotic dehydration process of green beans", Chem. Eng. J., 10, 84 (201