Rice is a priority food crop in Rwanda with an average productivity of 5.8 t /Ha, rice is grown over 12,400 Ha of marshlands in two sea-sons. Although there has been a rapid rise in rice production in the past decade, the country has not yet achieved self-sufficiency. Rwanda annually imports an average of 26,736 t of milled rice. Furthermore, the quality of locally produced rice lags behind that of imported rice due to the traditional methods still be used to mill the rice. Normally during designing this machine data were collected by questionnaire method through asking rice farmers’ questions relating to how they get milled rice. After analyzing the data, the solution was to design rice milling machine which is affordable that consisting the feeding unit, milling unit, cleaning unit, separating unit delivery unit and the frame. This rice milling machine has a capacity of 100 kg/hr. and powered by an 8 kW electric motor. The purpose of this sturdy is to design rice milling machine of available evidence based literature concerning the rice farmers’ problem. The farmers’ problem investigated is that the action of milling rice by traditional method gives very low production and it does not fulfill the market demand so the study gets achieved. This study will help rice farmers to get more income as the design shows that if we put the 1kg of paddy in hoper as machine shaft is revolving against station shaft here rubbing action take place rice get milled as blowing fane is separating brown rice from husks then we get the output of 0.72kg of white rice, the remaining 0.38% is broken rice at this level rice is ready to be packed.
Key words: rice milling, low cost, rice, blow out, machine, brown rice, paddy
Rice is generally considered as a semiaquatic annual plant, although it could survive as a perennial in the tropics or subtropics. It grows widely in the tropics where rainfall is abundant because it is a cereal that requires plenty of sunshine and water. It remains article of food for many countries and it is a basic food for world population. Rice is the seed of the monocot plants oryza (Asian rice) sativa ororyza glaberrima (African rice However, rice can be grown practically anywhere, even on a steep hill or mountain area with the use of water controlling terrace systems. Although its parent species are native to Asia and certain parts of Africa, centuries of trade and exportation have made it common place in many cultures worldwide (Koy and Adekoya, 1994). The traditional method for cultivating rice is flooding the fields while, or after, setting the young seedlings (Popoola, 2007). Rice processing involves harvesting, drying, threshing and milling. Each grain of rice is encased, in an easily removed protective hull. Rice is milled to remove the hull, bran and other unwanted materials (Matz, 1970). In the rice industry, milling is referred to as overall, Operations in rice mill-cleaning, shelling, bran removal and size separation.

attached documents to download

Manuscript_ SAMSON Nsengiyumva.pdf


  • sam -

    very good idea we completely love it especially in rwanda

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