Mass transfer kinetics and mathematical modeling of the osmotic dehydration of carrot cubes in glucose syrup and salt solutions

مجله پژوهشهای علوم و صنایع غذایی ایران

Article 34, Volume 13, Issue 5 - Serial Number 47, November and December 2017, Pages 704-719   

Document Type: Research Article

DOI: 10.22067/ifstrj.v1395i0.56206

Authors

Mina Kargozari^* ; Morteza Jamshid EIni

Department of Food Science, Islamic Azad University, North Tehran Branch, Tehran, Iran.

Abstract

Introduction: The osmotically dehydrated carrots can be added directly into soups, stews or can be used in a broad range of food formulations including instant soups, snack seasoning and etc. Osmotic dehydration is a suitable way to produce the shelf-stable products or partially dehydrated foods ready to place in other complementary processes such as air-drying, freezing and others. Modeling can certainly make differences in the food industry, leading to reduced costs and increased profitability. In food technology, at the simplest level, there are equations that determine the relationship between two or more variable. Simulation models in operation units and food preservation systems have attracted much attention in the past four decades. The mathematical equations describing mass transfer during osmotic dehydration, allow a better understanding of the composition of the material and operating parameters during dewatering. In this regard, many experimental and theoretical models have been reported in the literature but experimental models have more popularity because of easier applications. Regarding the classification of modeling in food processes, kinetic models are classified among theoretical models. It was ideal if we could use kinetic models based on fundamental scientific theories for the purposes of prediction and controlling the changes that occur in real food systems. But the complexity of the food makes the direct application of basic models impossible. The alternative is the direct study of kinetics on real food. As a result, the obtained models would be experimental or semi-experimental. Kinetics has developed as a powerful tool in modeling food quality features and in other words the modeling of food quality estimation is almost equivalent to the modeling of reaction kinetics in foods. The present study aimed to evaluate kinetics of osmotic dehydration of carrot cubes in terms of solid gain and water loss, which was studied at three glucose syrup concentration levels (30, 40 and 50% w/w), three salt concentration levels (5, 10 and 15% w/w) and three temperature levels of osmotic solution (30, 40 and 50°C) for 240 min. The experimental data were fitted to different semi-empirical kinetic models including Magee, Peleg and Page.

Materials and methods: Fresh well graded carrots were washed and peeled manually. A vegetable dicer was used to prepare carrot cubes of dimensions 1 cm× 1cm× 1 cm. The cubes were washed with fresh water to remove the carrot fines adhered to the surface of the fruit. The initial moisture content of the fresh carrot cubes varied from 86% to 90% (wet basis). Considering the greater effectiveness of a mixture of solutes over a single solute, a binary solution of salt and glucose syrup was used as the osmotic solution. The samples were excluded from the osmotic solution after 15, 30, 60, 120, 180 and 240 minutes. Carrot cubes were then washed with deionized distilled water, and were dried using a paper towel. Evaluation of mass exchange between the solution and sample during osmotic dehydration were made by using water loss and solid gain parameters. The experimental data were then fitted to different semi-empirical kinetic models including Magee, Peleg and Page which are widely used in biologic fields and the parameters of the models were determined. Data fitting was conducted using Microsoft Excel spreadsheet (Microsoft Office, 2010) using SOLVER add-in. Coefficient of determination (R2), chi-squared (χ2) and root mean square error (RMSE) were used to determine the best suitable model. An analysis of variance was conducted to determine the significant effects of process variables on solid gain and water loss.

Results and Discussion: At the beginning of the osmotic dehydration process, because of the high osmotic driving force between the concentrated solution and the fresh sample, the rate of water removal and solid gain was relatively high. Although water loss reached nearly the equilibrium conditions towards the late processing times, solid gain kept increasing. This increase in solid gain blocks the surface layers of the product, which reduces the concentration gradient between the product and osmotic solution, posing an additional resistance to mass exchange and lowering the rates of water loss at further processing times. It was also observed that while increasing the salt concentration, the solid gain in most of the samples significantly (p

Keywords

Osmotic Dehydration; mass transfer kinetics; Mathematical modeling; model fit; semi-empirical models

References

Ahmed, I., Qazi, I. M., & Jamal, S., 2016, Developments in osmotic dehydration technique for the preservation of fruits and vegetables. Innovative Food Science & Emerging Technologies, 34, 29-43.

Bahmani, A. A., Jafari, S. M., & Shahidi, S. A., 2015, Kinetic modeling of mass transfer during osmotic dehydration of eggplant (Solanum Melongena L.). Iranian Journal of Food Technology and Nutrition, 12(3), 65-76.

Bashari, S. T., Hamid, Mokhtarian, M., 2015, Monitoring of thin layer drying kinetics of Rhubarb during ultrasound- osmotic dehydration process. Iranian Journal of Biosystems Engineering, 46(3), 255-263.

Chavan, U., & Amarowicz, R., 2012, Osmotic dehydration process for preservation of fruits and vegetables. Journal of Food Research, 1(2), 202-215.

Ciurzyńska, A., Kowalska, H., Czajkowska, K., & Lenart, A., 2016, Osmotic dehydration in production of sustainable and healthy food. Trends in Food Science & Technology, 50, 186-192.

Datta, A. K., 2008, Status of Physics‐Based Models in the Design of Food Products, Processes, and Equipment. Comprehensive Reviews in Food Science and Food Safety, 7(1), 121-129.

Datta, A. K., & Halder, A., 2008, Status of food process modeling and where do we go from here (synthesis of the outcome from brainstorming). Comprehensive Reviews in Food Science and Food Safety, 7(1), 117-120.

Ganjloo, A., Rahman, R. A., Bakar, J., Osman, A., & Bimakr, M., 2012, Kinetics modeling of mass transfer using Peleg’s equation during osmotic dehydration of seedless guava (Psidium guajava L.): effect of process parameters. Food and Bioprocess Technology, 5(6), 2151-2159.

Garcia-Toledo, J. A., Ruiz-Lopez, I. I., Martinez-Sanchez, C. E., Rodriguez-Miranda, J., Carmona-Garcia, R., Torruco-Uco, J. G., Herman-Lara, E., 2016, Effect of osmotic dehydration on the physical and chemical properties of Mexican ginger (Zingiber officinale var. Grand Cayman). CyTA-Journal of Food, 14(1), 27-34.

Harris, D. C., 1998, Nonlinear least-squares curve fitting with Microsoft Excel Solver. Journal of chemical education, 75(1), 119-130.

Hathan, B. S., 2015, Studies on Mass Transfer and Diffusion Coefficients in Elephant Foot Yam (Amorphophallus spp.) during osmotic dehydration in sodium chloride solution. Journal of food processing and preservation, DOI: 10.1111/jfpp.12631.

Hii, C., Law, C., & Cloke, M., 2009, Modeling using a new thin layer drying model and product quality of cocoa. Journal of Food Engineering, 90(2), 191-198.

Horwutz, W., 2000, Official methods of analysis of AOAC International. 17th edn. vol. 1. AOAC Int, Gaithersburg, MD.

Ivester, R. W., 2008, Productivity improvement through modeling: an overview of manufacturing experience for the food industry. Comprehensive Reviews in Food Science and Food Safety, 7(1), 182-191.

Júnior, B., Lucena, J., Cordeiro Mancini, M., & Hubinger, M. D., 2013, Mass transfer kinetics and mathematical modelling of the osmotic dehydration of orange‐fleshed honeydew melon in corn syrup and sucrose solutions. International Journal of Food Science & Technology, 48(12), 2463-2473.

Kargozari, M., Emam-Djomeh, Z., & Moini, S., 2011, Optimization of osmotic dehydration of carrot cubes using response surface methodology. Iranian Journal of Biosystems Engineering, 42(2), 215-224.

Kargozari, M., Moini, S., & Emam‐Djomeh, Z., 2010, Prediction of some physical properties of osmodehydrated carrot cubes using response surface methodology. Journal of food processing and preservation, 34(6), 1041-1063.

Moreira, R., & Sereno, A. M., 2003, Evaluation of mass transfer coefficients and volumetric shrinkage during osmotic dehydration of apple using sucrose solutions in static and non-static conditions. Journal of Food Engineering, 57(1), 25-31.

Park, K. J., Bin, A., Brod, F. P. R., & Park, T. H. K. B., 2002, Osmotic dehydration kinetics of pear D'anjou (Pyrus communis L.). Journal of Food Engineering, 52(3), 293-298.

Pavelkić, V. M., Brdarić, T. P., Petrović, M. P., Šekularac, G. M., Košević, M. G., Pezo, L. L., & Ilić, M. A., 2015, Application of Peleg model on mass transfer kinetics during osmotic dehydratation of pear cubes in sucrose solution. Chemical Industry and Chemical Engineering Quarterly, 21(4), 485-492.

Saini, C., 2015, Mass Transfer Kinetics during Osmotic Dehydration of Pineapple Samples Coated with Pectin. International Journal of Agriculture, Environment and Biotechnology, 8(2), 467-476.

Singh, B., Kumar, A., & Gupta, A., 2007, Study of mass transfer kinetics and effective diffusivity during osmotic dehydration of carrot cubes. Journal of Food Engineering, 79(2), 471-480.

Souraki, B. A., Ghaffari, A., & Bayat, Y., 2012, Mathematical modeling of moisture and solute diffusion in the cylindrical green bean during osmotic dehydration in salt solution. Food and bioproducts processing, 90(1), 64-71.

Sutar, P., & Gupta, D., 2007, Mathematical modeling of mass transfer in osmotic dehydration of onion slices. Journal of Food Engineering, 78(1), 90-97.

Van Boekel, M. A., 2008, Kinetic modeling of food quality: a critical review. Comprehensive Reviews in Food Science and Food Safety, 7(1), 144-158.

Yadav, A. K., & Singh, S. V., 2014, Osmotic dehydration of fruits and vegetables: a review. Journal of food science and technology, 51(9), 1654-1673