EFFECT OF HULLING MACHINES ON HULLING CHARACTERISTICS AND QUALITY OF RICE GRAINS

Yehia, Mohamed E.; Katab, A. R.

doi:10.21608/mjae.2018.96055

EFFECT OF HULLING MACHINES ON HULLING CHARACTERISTICS AND QUALITY OF RICE GRAINS

Document Type : Original Article

Authors

Res, Rice Technology Training Center, Field Crops Research Institute, A.R.C., Alexandria, Egypt.

10.21608/mjae.2018.96055

Abstract

During milling process, the convention to husk paddy rice is pass it between two rubber rollers that are rotating with a surface speed different. The resulting normal pressure and shear stress causes the husk to be peeled away from kernel. This operation is one of the most important stages, which effectively determines the quantitative and qualitative losses of rice. The main aim of this research was to evaluate the hulling characteristics of different rubber roll type huskers (adjust the clearance one manually and the other by pressing the air) using paddy rice variety Giza 179 as a short grain was studied based on some technical indicators. Two types of machines (THU-35A and HR-10 MPc) were used. The results showed that the operational parameters for Optimum operational efficiency are: 0.9 mm clearance and 1.4 Speed ratio, the husker machine model (SATAKE THU-35A). For the husker machine model (SATAKE HR-10 MPc) at constant speed ratio of 1.25, the optimum operational efficiency are: 3.3 Kg/cm² pneumatic pressure and 90 Kg/min. feeding rate for the Husker machine (HR-10 MPc) at constant speed ratio of 1.25. To describe the effect the efficiency of paddy hulling, the percentage of broken grain and the power consumption's of husker machines as a function of paddy feeding rate, rubber roll clearance and speed ratio a computer programmer for regression analysis were used.

Main Subjects

Processing Engineering of Agricultural Products

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