volume | PIER Journals

Abstract

Considering Radio Frequency (RF) heating as a viable alternative for the in-shell heating of eggs, Finite Element Modeling and simulation of RF heating of in-shell eggs at 27.12 MHz were carried out to assess the feasibility and heating uniformity of the process. According to the recommendations of USDA-FSIS for the pasteurization of eggs, egg white must be heated up to 57.5°C, and the egg yolk has to be heated up to 61.1°C for 2 min. The objective of the simulation was to determine the locations of hot and cold spots generated due to non-uniform heating. A parallel plate setup for Radio Frequency heating was simulated for different electric field strength levels and orientations of the egg (long axis parallel and long axis perpendicular to the plates). The simulation results were experimentally verified and the simulation procedure was validated using a laboratory parallel plate RF setup. A coaxial cavity design was simulated with a similar approach. Results indicated that both the parallel and coaxial cavity designs were suitable for in-shell pasteurization of eggs provided that the eggs were rotated to maintain the uniformity in heating. After the simulation of RF heating process, the process optimization was carried out to determine the most effective procedure for the process. The varying parameters obtained by using different modeling techniques for radiofrequency heating of in-shell eggs, were optimized using MATLAB. Laboratory scale experimental trials were conducted to test the validity and effectiveness of the optimized parameters. The optimal parameters set forth were found to be more efficient in terms of heating time and uniformity.

1. Swendseid, M. E., R. J. Feeley, C. L. Harris, and S. G. Tuttle, "Egg protein as a source of the essential amino acids: Requirement for nitrogen balance in young adults studied at two levels of nitrogen intake," The Journal of Nutrition, Vol. 68, 203-211, 1959. Google Scholar

2. Li-Chan, E. C. Y., W. D. Powrie, and S. Nakai, "The chemistry of eggs and egg products," Egg Science and Technology, W. J. Stadelman and O. J. Cotterill (eds.), Food Products Press, New York, 1995. Google Scholar

3. FSIS-USDA "Risk assessments for Salmonella enteritidis in shell eggs and Salmonella spp," Egg Products, FSIS, Omaha, 2006. Google Scholar

4. Schroeder, , C. M., A. L. Naugle, W. D. Schlosser, A. T. Hogue, F. J. Angulo, J. S. Rose, E. D. Ebel, W. T. Disney, K. G. Holt, and D. P. Goldman, "Estimate of illnesses from Salmonella enteritidis in eggs, United States 2000," Emerg. Infect. Dis., Vol. 11, 113-115, 2005.
doi:10.3201/eid1101.040401 Google Scholar

5. Stlouis, M. E., D. L. Morse, M. E. Potter, T. M. Demelfi, J. J. Guzewich, R. V. Tauxe, and P. A. Blake, "The emergence of grade-a eggs as a major source of Salmonella-enteritidis infections --- New implications for the control of salmonellosis," Journal of the American Medical Association, Vol. 259, 2103-2107, 1988.
doi:10.1001/jama.259.14.2103 Google Scholar

6. Hou, H., R. K. Singh, P. M. Muriana, and W. J. Stadelman, "Pasteurization of intact shell eggs," Food Microbiol, Vol. 13, 93-101, 1996.
doi:10.1006/fmic.1996.0012 Google Scholar

7. Dev, S. R. S., G. S. V. Raghavan, and Y. Gariepy, "Dielectric roperties of egg components and microwave heating for in-shell pasteurization of eggs," Journal of Food Engineering, Vol. 86, 207-214, 2008.
doi:10.1016/j.jfoodeng.2007.09.027 Google Scholar

8. Birla, S. L., S. Wang, and J. Tang, "Computer simulation of radio frequency heating of model fruit immersed in water," Journal of Food Engineering, Vol. 84, 270-280, 2008.
doi:10.1016/j.jfoodeng.2007.05.020 Google Scholar

9. Campanone, L. A., C. A. Paola, and R. H. Mascheroni, "Modeling and simulation of microwave heating of foods under different process schedules," Food and Bioprocess Technology, Vol. 5, 738-749, 2011.
doi:10.1007/s11947-010-0378-5 Google Scholar

10. Campanone, L. A. and N. E. Zaritzky, "Mathematical modeling and simulation of microwave thawing of large solid foods under different operating conditions," Food and Bioprocess Technology,, Vol. 3, 813-825, 2010.
doi:10.1007/s11947-009-0249-0 Google Scholar

11. Chen, H., J. Tang, and F. Liu, "Simulation model for moving food packages in microwave heating processes using conformal FDTD method," Journal of Food Engineering, Vol. 88, 294-305, 2008.
doi:10.1016/j.jfoodeng.2008.02.020 Google Scholar

12. Jia, X. and P. Jolly, "Simulation of microwave field and power distribution in a cavity by a 3-dimensional finite-element method," J. Microwave Power and Electromag Energy, Vol. 27, 11-22, 1992. Google Scholar

13. Liu, C. M., Q. Z. Wang, and N. Sakai, "Power and temperature distribution during microwave thawing, simulated by using Maxwell's equations and Lambert's law," International Journal of Food Science and Technology, Vol. 40, 9-21, 2005.
doi:10.1111/j.1365-2621.2004.00904.x Google Scholar

14. Olivera, D. F. and V. O. Salvadori, "Finite element modeling of ood cooking," Lat. Am. Appl. Res., Vol. 38, 377-383, 2008. Google Scholar

15. Tiwari, G., S. Wang, J. Tang, and S. L. Birla, "Computer simulation model development and validation for radio frequency (RF) heating of dry food materials," Journal of Food Engineering,, Vol. 105, 48-55, 2011.
doi:10.1016/j.jfoodeng.2011.01.016 Google Scholar

16. Watanabe, S., M. Karakawa, and O. Hashimoto, "Computer simulation of temperature distribution of frozen material heated in a microwave oven," IEEE Trans. on Microw. and Theory, Vol. 58, 1196-1204, 2010.
doi:10.1109/TMTT.2010.2045526 Google Scholar

17. Zhou, L., V. M. Puri, R. C. Anantheswaran, and G. Yeh, "Finite-element modeling of heat and mass-transfer in food materials during microwave-heating --- Model development and validation," Journal of Food Engineering, Vol. 25, 509-529, 1995.
doi:10.1016/0260-8774(94)00032-5 Google Scholar

18. Lin, , Y. E., R. C. Anantheswaran, V. M. Puri, and , "Modeling temperature distribution during microwave heating," American Society of Agricultural Engineers, Paper No. 89-6506, ASAE AIM, Saint Joseph, MI, USA, 1989. Google Scholar

19. Fu, , W. and A. Metaxas, "Numerical prediction of three-dimensional power density distribution in a multimode cavity," J. Microwave Power and Electromag Energy, Vol. 29, No. 2, 67-75, 1994. Google Scholar

20. Dai, J., "Microwave-assisted extraction and synthesis studies and the scale-up study with the aid Of FDTD simulation,", Dissertation, Department of Bioresource Engineering, McGill University, Canada, 2006. Google Scholar

21. Kannan, S., "Preliminary analyses of the dielectric properties of egg for radio frequency pasteurization," NABEC, Paper No. 11-020, Vol. 22, No. 1, Vermont, USA, 2011. Google Scholar

Dr. Satyanarayan R. S. Dev

Dr. Shrikalaa Kannan

Mr. Yvan Gariepy

Dr. Vijaya G. S. Raghavan