Click on “Download PDF” for the PDF version or on the title for the HTML version. If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options. Preliminary Results of Radio Pasteurization (RAP)Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org Citation: Paper number 026005, 2002 ASAE Annual Meeting . (doi: 10.13031/2013.10543) @2002Authors: David J. Geveke, Chris Brunkhorst, Michael F. Kozempel Keywords: Food safety, nonthermal pasteurization, RF energy, yeasts, electric field Radio frequency energy was investigated as a nonthermal alternative to thermal pasteurization. Two RF power supply systems were assembled and provided frequencies in the range of 20 kHz to 27 MHz. Electric field strengths of 14 to 30 kV/cm were applied to suspensions of Saccharomyces cerevisiae in water over a temperature range of 28 to 55C. The flow rate was 1.2 l/min and the number of exposures to the fields ranged from 1 to 30. The population of S. cerevisiae was reduced by >5 log following 30 exposures to a 100 kHz, 25 kV/cm field at 28C. Increasing the field strength and temperature, as well as decreasing the frequency enhanced inactivation. These preliminary results of radio pasteurization, RAP, are encouraging and will be used in an effort to extend this technique to bacteria in vegetable and fruit juices. (Download PDF) (Export to EndNotes)
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