Effect of Drying Methods on Increasing Milling Yield of Parboiled Paddy Varieties Using Rubber Roll Sheller

Six slender paddy varieties namely, ʹADT41ʹ and ʹBasmatiʹ (extra long slender), ʹC045ʹ and ʹADT38ʹ (long slender), ʹC043ʹ and improved ʹWhite ponniʹ (medium slender) grains were first parboiled. These were dried by sun-drying, shade drying and hot air drying at 60°, 70°, 80° and 90°C to the moisture content in the range of 12-14 % (w.b.) followed by shelling using rubber roll sheller to increase the head rice recovery and milling yield. The time required for drying of extra long slender and long slender paddy varieties were comparatively shorter 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 yield and head rice recovery were significantly higher in shade dried parboiled varieties. It was also observed that, the percentage of broken rice was more as drying temperature was increased to 90°C.