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The effect of clearance and cylinder speed ratios & seed moisture content on broken Rice ratios during Husking & Whitening of Rice Anbber 33. | ||
| Jornal of Al-Muthanna for Agricultural Sciences | ||
| Article 1, Volume 2, Issue 1, 2014, Pages 1-20 | ||
| Abstract | ||
| Abstract This research covered two aspects, the first was to estimate quantity and percentage of total milling yield and broken rice during husking and whitening operation by using different speed ratios , different clearances for rubber roll husker, different moisture content, and two types of whitening machines (H . abrasive & Jet Pearler ). *بحث مستل من رسالة ماجستير للباحث الثاني The second aspect was to compare modern mill ( Rubber roll )with traditional mill .Disk sheller ) based on yield and quality of rice .The first aspect of research was conducted at rice laboratory of Al -tajee mill , Central Laboratory for Standardization and quality control of General Company for Grain Trading .The study results showed that the change of speed ratio from (1:0.53) to (1:0.75) indicated that reduction of unhulling grains ,the increase of clearance between the rubber roll of husker from 0.5 mm to 0.9 mm resulted in indicated an increase of unhulling speed ratio and a reduced of husking ratio ,the ratio of broken rice was reduced as the clearance was increase. In general the husking efficiency has ranged from (80-90)% and it was decreased with the increase of moisture content . The whitening by abrasion in H.abrasive machine produced less broken rice and best ratio of milling yield than the whiting type by friction in jet pearler machine for anbbar 33. The second aspect of study showed that the roll type of modern rice mill has superior performance than that of Disk sheller type of traditional rice mill .It produced 65.25% total milling ratio, 50.25% head rice ratio and 14.83% broken rice ratio ,while the traditional rice mill produced 60.27% total milling ratio, 38.13%head rice ratio and 22.1% broken rice ratio. | ||
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