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Development of a New Technique for Fine Sorting of Brown Rice by Use of a Combination of a Thickness Grader and a Color Sorter

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2007 ASAE Annual Meeting  076266.(doi:10.13031/2013.23439)
Authors:   Shuso Kawamura, Kazuhiro Takekura, Hideyuki Takenaka
Keywords:   sieve slot width, sorting yield, percentage of sound whole kernels, brown rice grade, milling yield, eating quality

A research project was conducted to develop a new technique for fine sorting of brown rice by the use of a combination of a thickness grader and a color sorter in order to increase sorting yield and improve rice quality. It was found that a greater sorting yield and processed rice of high quality can be obtained by reducing sieve slot width of the thickness grader by 0.10 mm from the conventional standard slot width and then removing immature, damaged and discolored kernels by the combined use of a color sorter. By using the brown rice fine sorting technique developed in this study, rice farmers' income can be increased and high-quality rice can be supplied to consumers.

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