Evaluation of rice milling quality and energy requirement via a developed vibratory rice grader.
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Date
2022
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Publisher
Algerian Journal of Engineering and Technology.
Abstract
In one of the approaches used in processing rice, rice is usually parboiled before milling
operation and grading is one of the milling operations required to classify rice into different
grades of importance viz. the head and broken rice. In this study, a vibratory rice grader was
developed. The effect of processing conditions on the milling quality (milling recovery, head
milled rice and broken rice), grading time, energy requirement and energy intensity were
evaluated. Taguchi experimental design (L933) was used to interact the soaking time (4 – 6 h),
steaming time (30 – 40 mins) and rice variety (FARO 15, FARO 60 and FARO 62). Standard
equations were used to evaluate the effect of processing conditions on the milling quality,
energy requirement and energy intensity. Milling recovery ranged from 53% to 70%, head
milled rice (41% - 67%), broken milled rice (3% - 12%), grading time (4.4 – 5.8 mins), energy
requirement (2.632 MJ to 2.649 MJ) and energy intensity (1.20 – 1.58 MJ/kg). An increase in
soaking time and steaming time increased the grading time, milling recovery, head milled rice,
energy requirement and energy intensity but reduced the broken milled rice. The estimated
cost of the developed vibratory rice grader was $151. This study provides valuable information
on a simple way of designing and developing a rice grader that could be adopted for grading
rice into whole rice or head rice and broken rice.
Description
Keywords
Energy intensity; Energy requirement; Milling quality; Grader; Rice
Citation
Sanusi, M.S., *Sunmonu, M.O*. Hussein, J.B., Olaleye, S. A., Adedeji, I. B., Hamzat, G.O.& Popoola, I.T. (2022). Evaluation of rice milling quality and energy requirement via a developed vibratory rice grader. Algerian Journal of Engineering and Technology. (7), 19-26, Published by the Department of Process Engineering & Petroleum Chemistry, Faculty of Technology, University of El Qued, Algeria. Available online at: http://www.jetjournal.org/index.php/ajet/issue/view/8