Computer-controlled microwave heating to in-package pasteurize beef frankfurters for elimination of Listeria monocytogenes

The objective of this study was to develop an. in-package pasteurization technology to kill Listeria monocytogenes in. ready-to-eat meats using microwave heating. This technology utilized an infrared sensor to monitor the surface temperature of beef frankfurters during microwave heating. The airs was to increase the surface temperature of frankfurters to a set point lethal to L. monocytogenes. A,feedback control mechanism was used to control the power to the microwave oven. Results indicated that the simple oil-off control mechanism was able to maintain. the surface temperature of beef frankfurters near the respective set points of 75, 80 or 85C used in. this study. This pasteurization process was able to achieve a 7-log reduction of L. monocytogenes in inoculated beef frankfurters using a 600-W nominally rated microwave oven within 12-15 min. If optimized, this system may provide the food industry with a terminal, postlethality pasteurization, technology to kill L. monocytogenes in. ready-to-eat meats within. the final packages.