بررسي و مقايسه ميزان ضايعات برنج در دو روش متداول تبديل شلتوك به برنج سفيد در استان گيلان

Study and comparison of rice losses in two common milling methods in Guilan, Iran

in order to evaluate and compare of rice losses in the two common rice milling methods in Gilan province, including 1. Rubber-roll husker + Blade type whitener; and 2. Blade-type husker + Blade-type whitener, some samples were collected from the outlet of husker and whitener in each method, and percentage of broken rice (brown and white rice) was determined. Three rice varieties of Binam, Hashemi and Alikazemi were milled in the experiment. The results revealed that there was a significant difference between the average of percentage of broken (brown and white) rice in the two methods for all vaieties at 1% level. The percentage of broken (brown) rice in first method was 7.06% compared to 10.05 for the second method. The percentage of broken rice (white) in the first method was 19.41% and that of the second method was 22.60%. Besides the type of rice milling method, there was a significant difference between the average of white rice in the three studied varieties, and Alikazemi gave highest percentage of broken rice of 25.92%. There was no significant difference between the average of broken rice of Binam and Hashemi. The total percentage of broken rice in first method was 3.20% lower compared to the second method.