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ARS Home » Pacific West Area » Parlier, California » San Joaquin Valley Agricultural Sciences Center » Commodity Protection and Quality Research » Research » Publications at this Location » Publication #258405
Title: Determining radio frequency heating uniformity of mixed beans during disinfestation treatments

Author
item JIAO, S - Washington State University
item TANG, J - Washington State University
item Johnson, Judy
item TIWARI, G - Washington State University
item WANG, S - Washington State University

Submitted to: Microwave Power Symposium Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 5/10/2010
Publication Date: 7/15/2010
Citation: Jiao, S., Tang, J., Johnson, J.A., Tiwari, G., Wang, S. 2010. Determining radio frequency heating uniformity of mixed beans during disinfestation treatments. 2010 IMPI 44th Annual Microwave Power Symposium Proceedings. July 14-16, 2010, Denver, CO.

Interpretive Summary:

Technical Abstract: Since chickpeas and lentils are difficulty to artificially infest with live insects for radio frequency (RF) treatment validation, black-eyed peas and mung beans were selected to infest with insects before mixing with chickpeas and lentils. Temperature difference between black-eyed pea and chickpea or between mung bean and lentil were determined in a pilot-scale 27 MHz RF unit. When subjected to RF heating for 6 and 10 min, the final temperatures in black-eyed pea at the moisture content of 8.8% and mung bean at 10.2% w.b. were 6 and 4°C higher than those in chickpea at 7.0% and lentil at 7.1% w.b. when the sample temperature was raised to 60°C. To obtain conservative results, chickpea and lentil should reach slightly higher temperatures than the black-eyed pea and mung bean in the same treatment. By reducing the moisture contents in black-eyed pea and mung bean to 2.6% and 3.7%, respectively, their final temperatures were about 3.5 and 3.7°C lower than those of chickpea and lentil.