This study aimed to identify milling characteristics depending on the number of a cutting roller’s air vent and blowing velocity to remove rice bran by the cutting type milling machine which can minimize the conventional milling process. The level of whiteness was found to be 38±0.5 in all the conditions, showing consistent whiteness levels during milling. The rice temperatures turned out to be 15.4 and 14.6oC which were rather low-level under the conditions of the cutting roller with 3 vents and blowing velocities of 35 and 40 m/s respectively. Cracked rice ratio was 2.13% under the conditions of the cutting roller with 3 vents and a blowing velocity of 35 m/s. Broken rice ratio showed the range of 0.762-0.869%, reflecting a low level. Turbidity after milling was decreased, as blowing velocity became faster. Energy consumption for milled rice production was decreased, as blowing velocity became faster. The optimum milling condition for cutting type milling machine depending on air vent number of cutting roller and blowing velocity was found to be 3 vents and 35 m/s.

• Byeong Hyo Cho(Department of Biosystems Engineering, Chungbuk National University)
• Sin Hyeong Kang(Major in Bio-Industry Mechanical Engineering, Kongju National University)
• Jin Ho Won(Department of Biosystems Engineering, Chungbuk National University)
• Sook Lee(Department of Consumer Studies, Chungbuk National University)
• Tae Hwan Kang(Hamyany County Office)
• Dong Il Lee(Department of Biosystems Engineering, Chungbuk National University)
• Chung Su Han(Department of Biosystems Engineering, Chungbuk National University) Corresponding author