Engineering Studies on the Performance of Paddy and Rice Separator

Fouda, T.

doi:10.21608/mjae.2009.109761

Cited by 4 publications

(6 citation statements)

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“…Motion of material over sieve surface : The motion of the grains over the sieve from the dehuller outlet to the end of the screen is important, as it helps in the uniform distribution of the grains over the screen. The motion of material over the sieve surface is calculated using the following equations (Fouda, 2011).

ω goodbreak= \sqrt{\frac{g (μ \cos α - \sin α)}{r (\cos α + μ \sin α)}}

where ω is the angular velocity (rad/s), g is the acceleration due to gravity (m/s), μ is the coefficient of friction, α is the angle of sieve from horizontal surface (degree), and r is the Length of crank shaft rod (m).…”

Section: Methodsmentioning

confidence: 99%

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Development and performance evaluation of foxtail millet (Setaria italica L.) dehuller

Krishnappa

Saravanan

Natarajan

2021

J Food Process Engineering

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Foxtail millet dehuller for double stage dehulling was developed and evaluated. The machine consists of a hopper, two knurled rolls, two rubber rolls, an air blower, and a grader. The machine was evaluated for foxtail millet (Setaria italica L.) at the different grain moisture content (10, 12, 14, and 17% [w.b.]), types of knurled rolls (diamond, angular, and straight knurled) and feed rate (100,200,300 kg/hr) for performance evaluation or efficiency. The maximum dehulling efficiency and cleaning efficiency of 82.24 and 82.47% was observed for 12% moisture content (w.b.), diamond-type knurled roll and 100 kg/hr feed rate. Similarly, the maximum head grain yield of 97.82% and the minimum broken of 2.18% was observed for 12% moisture content (w.b.), diamond-type knurled roll and 300 kg/hr feed rate. There was no significant change in the color values with the treatments. The predicted optimum condition for the machine is moisture content 12% (w.b.), diamond-type knurled roll and feed rate of 100 kg/hr, which gave an optimum dehulling efficiency of 82.24%, head grain yield of 95.84%, broken of 4.16%, and cleaning efficiency of 82.47% with the desirability of 0.825. The economic analysis shows the suitability of the machine for small-scale millet processors.Practical Applications: Dehulling of millets is an essential unit operation in millet processing. This study evaluated the performance analysis of the developed dehuller for foxtail millet at different grain moisture content, types of knurled rolls, and feed rate. The process parameters were optimized, which can be used to design the dehuller for millets. The results obtained show the relevance of applying the developed dehuller for foxtail millet applications, providing an alternative processing machine for millet processing. 1 | INTRODUCTION Millet is a cereal crop that belongs to the Graminae family. It belongs to small-seeded annual grass and is classified under the five genera: Panicum, Setaria, Echinochloa, Pennisetum, and Paspalum in the tribe Paniceae and one genus, Eleusine, in the tribe Chlorideae. Millets have been consumed as a staple food for thousands of years in countries like Africa and India. Based on size and usage, millets are classified into major millets (Pearl millet, sorghum, and maize and minor [Foxtail millet, finger millet, kodo millet, proso millet, barnyard millet, and brown top millet]). Millets are rich in nutrients like carbohydrates, vitamins, minerals, fiber, and important dietary protein sources. Minor millets can be consumed in combination with other millets or cereals or as a single grain. Foxtail millet (Setaria italica L.) is one of the ancient crops probably domesticated in eastern Asia and known to the Chinese as early as 2700 B.C It was also reported that foxtail millet crop dates back to 2000 years by agricultural sites from Switzerland and Austria. The

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ω goodbreak= \sqrt{\frac{g (μ \cos α - \sin α)}{r (\cos α + μ \sin α)}}

Section: Methodsmentioning

confidence: 99%

“…Motion of material over sieve surface: The motion of the grains over the sieve from the dehuller outlet to the end of the screen is important, as it helps in the uniform distribution of the grains over the screen. The motion of material over the sieve surface is calculated using the following equations (Fouda, 2011).…”

Section: Slopementioning

confidence: 99%

Development and performance evaluation of foxtail millet (Setaria italica L.) dehuller

Krishnappa

Saravanan

Natarajan

2021

J Food Process Engineering

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“…After that, the brown rice and paddy rice on the shaking separator machine ran for a total of 150 s in all simulated cases. Fouda (2009) and Modi and Parkar (1979) applied Equation 6to find the effectiveness of the separation to be used as an index for separating the paddy rice from the brown rice. The separation effectiveness between brown rice and paddy rice was assigned a value from 0 to 1.…”

Section: Mathematical Modelsmentioning

confidence: 99%

“…Kojima et al (1993) investigated the separation performance of rice movement and the distribution of brown rice and paddy rice on a shaking tray at various mixing ratios to determine the optimal operating conditions. In addition, Fouda (2009) examined the most suitable conditions for separating brown rice and paddy rice using a screen-type paddy rice separator (model: SATAKE Ps 120E). It was found that the optimal inclination angle of the sieve for minimizing the cracking of the rice was 15° at a speed of 200 rpm, with seed moisture of 14 % on a wet basis (w.b.…”

Section: Introductionmentioning

confidence: 99%

Discrete element simulation of brown rice and paddy rice on shaking separator machine

2022

ANRES

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Importance of the work:The operational performance of the tray of a rice separator point is critical to the productivity of a system. Objectives: To determine the angle effects and the influence of the mixing ratio on the separation efficiency of materials. Materials & Methods: Rice seed movement was described based on Newton's law and the Hertz-Mindlin contact model. In the simulation, the paddy rice was mixed in the range 5-50%, the tray was angled 3.5-5.0°, the average particle diameter was 2.13 mm and length was 8.38 mm, with 14% wet basis moisture content. The shaking separator machine for brown and paddy rice was evaluated using discrete element simulation and experiments at the same scale. Results: The simulations predicted the motion of particles very well. The simulation showed that 4.30° was the most appropriate tilt angle of the tray for separating the paddy, with a maximum rejection efficiency of 0.89 Main finding: Several tests or one test with several results are necessary to better select all parameters. The simulation result was confirmed by the experiment in terms of the efficiency of separation and movement on the tray.

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“…The theoretical analyses by Fouda (2009) revealed that the optimum sieve speed of 0.5 m/s (200 rpm) is recommended to prevent riding of material on the sieve surface. The experimental results reveal that the cleaner performance was in the optimum region under sieve angle of 15° and paddy moisture content of 14 %.…”

Section: Introductionmentioning

confidence: 99%

Enhancing The Performance of Rice-Grain Milling Machine By Attaching A Developed Primary Cleaning-Unit تحسين اداء آلة تبييض الأرز بأضافة وحدة تنظيف أولية مطورة

Morad

AL-Gezawe

ElGawad

et al. 2021

Journal of Soil Sciences and Agricultural Engineering

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The present study aims to enhance the performance of the rice grain-milling machines by using an attached primary cleaning-unit. The performance of the developed rice grain-milling machine was studied in terms of four different sieve shapes "CSS" of the attached primary cleaning unit ("A", "B", "C" and "D") with four different feeding rates (1.00, 1.25, 1.50 and 1.75 Mg/h) and four different primary cleaning sieve "PCS" speeds (310, 360, 420 and 470 rpm). The machine performance was depended on measuring machine productivity, machine efficiency, cleaning efficiency, total grain losses, required power, energy requirements and both operational and criterion costs. Results indicated that the best performance was yielded with the use of primary cleaning unit sieve shape "D" side by side with adjusting the feeding rate at 1.25 Mg/h and "PCS" speed at 360 rpm. Under these conditions values of machine productivity, machine and cleaning efficiencies were 1.20 Mg/h, 94.80 % and 96.90 % respectively. Meanwhile, the required power and energy requirements were 17.0 kW and 20.53kWh/Mg respectively. Finally, minimum operational and criterion costs were 43.18 and 94.52 LE/Mg, respectively.

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Engineering Studies on the Performance of Paddy and Rice Separator

Cited by 4 publications

References 0 publications

Development and performance evaluation of foxtail millet (Setaria italica L.) dehuller

Development and performance evaluation of foxtail millet (Setaria italica L.) dehuller

Discrete element simulation of brown rice and paddy rice on shaking separator machine

Enhancing The Performance of Rice-Grain Milling Machine By Attaching A Developed Primary Cleaning-Unit تحسين اداء آلة تبييض الأرز بأضافة وحدة تنظيف أولية مطورة

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