Abstract

Paddy varieties namely ADT 41 and Basmati (extra long slender), CO 45 and ADT 38 (long slender), CO 43 and improved white ponni (medium slender) grains were dried under sun drying, shade drying and hot air drying at 30,40,50 and 60°C to the moisture content in the range of 12-14% w.b. They were shelled by using rubber roll sheller in order to increase the head rice recovery and milling outtura. The observations concluded that the time required for drying of extra long slender and long slender paddy varieties were comparatively lesser than medium slender varieties. The breakage was significantly higher in extra long and long slender varieties. From the milling results, it was found that the milling outturn and head rice recovery were significantly higher in shade dried paddy varieties. It was also observed that, as drying temperature was increased to 60°C the percentage of broken rice increased.

Keywords: Rubber roll sheller, Milling, Head rice, Broken rice, Drying characteristics.