Rubber roller husker was carried out from ricepolisher's blog

Performance analysis of experimental impeller and rubber roller husker was carried out using three different varieties of rice namely; Akitakomachi (short grain), Delta (long grain) and L201 (long grain). Impeller husker speed was varied from 1400 to 3300 rev/min and rubber roll husker clearance was varied from 0.4 to 2.4 mm. In rubber roll husker, rough rice was husked randomly and as single grain vertically and horizontally.

For both huskers, variation of husked ratio with specific husking energy was well expressed by the Weibull's distribution function. Husking energy efficiency, system cracked ratio and system broken ratio curves were well expressed by the empirical equations. The three performance parameters were used to optimize the husking performance of the two huskers for the three varieties of rice. Rubber roll husker had high husking energy efficiency compared to impeller husker for randomly husked short grain rice and for all the three varieties of rice husked as single grain. Optimal husked ratio in terms of husking energy efficiency was also found to be optimal in terms of system cracked ratio and system broken ratio for all the three varieties of rice.

Rice is a major crop in Iran, where rice production increased from 1.3 Mt in 1980 to 3.5 Mt in 2007. The main rice cultivated areas are located in the northern parts of the country, producing 75% of Iran's rice crop. Both local and improved varieties are cultivated in the rice growing regions of the country. Milling, an important processing step of paddy (rough rice), is usually done to produce milled and polished grain. A typical rice milling system is a multi-stages process where the paddy is first subjected to dehusking by using a husker and then to removed of brownish outer layer, known as whitening. One of the major problems of rice industry is breakage of kernels during milling. As cooking quality of broken rice is very poor, the market value with broken grain is much less than that for whole grains.

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By ricepolisher
Added May 31

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