Evaluation of rice milling quality and energy requirement via a developed vibratory rice grader

  • Mayowa Saheed SANUSI Department of Food Technology, University of Ilorin, Nigeria
  • Musiliu Olushola Sunmonu Department of Food Engineering, University of Ilorin, Ilorin, Nigeria
  • Jelili Babatunde Hussein Department of Food Science and Technology Modibbo Adama, University, Yola, Nigeria
  • Sodiq Ayinde Olaleye Department of Food Engineering, University of Ilorin, Ilorin, Nigeria
  • Ifeoluwa Benjamin Adedeji Department of Food Engineering, University of Ilorin, Ilorin, Nigeria
  • Ganiyu Oluwaseyi Hamzat Department of Food Engineering, University of Ilorin, Ilorin, Nigeria
  • Israel Tomiwa Popoola Department of Food Engineering, University of Ilorin, Ilorin, Nigeria
Keywords: Energy intensity, Energy requirement, Milling quality, Grading, Processing Conditions


In the modern way of 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. The soaking time (4 – 6 h), steaming time (30 – 40 mins) and rice variety (FARO 15, FARO 60 and FARO 62) were interacted using Taguchi experimental design (L933). Standard equations were used to evaluate the effect of processing conditions on the milling quality, energy requirement and energy intensity of the rice grader. 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 $152. 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.


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Evaluation of rice milling quality and energy requirement via a developed vibratory rice grader
How to Cite
SANUSI MS, Sunmonu MO, Hussein JB, Olaleye SA, Adedeji IB, Hamzat GO, Popoola IT. Evaluation of rice milling quality and energy requirement via a developed vibratory rice grader. Alger. J. Eng. Technol. [Internet]. 2022Sep.28 [cited 2022Dec.3];. Available from: https://jetjournal.org/index.php/ajet/article/view/216