A Study of Paddy Heating for Insect Elimination and Improving Milled Rice Quality

Abstract:

This research was aimed at studying the effects of heating the paddy for insect killing and thereby improving subsequently milled rice quality. The experimental temperatures were in the range of 120-200°C, the paddy feeding rates were 60, 120, and 180 kg/h and the heights of the vibration screen were 5, 6, and 8 mm. The findings indicated that when the feeding rates increased between 120 and 180 kg/h, the insect death rate increased for nearly all temperature levels, whereas the feeding rate of 60 kg/h and the vibration screen height of 6 mm were found to give 100% insect killing efficiency. The resulting head rice yield increased by 0.3-0.7% for a screen height of 8 mm. The quantity of broken rice decreased whereas the total rice quantity did not vary significantly; the milled rice had a whiteness index slightly increased when compared to the reference rice.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 1707-1713
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.1707
• Online since: February 2012
• Authors: Pradit Ramatchima, Somposh Sudajan, Chaiyan Junsiri, Thavachai Thivavarnvongs
• Keywords: Height of Vibration Screen, Insect Death Rate, Paddy Heating

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