pengaruh lama perendaman terhadap mutu beras pratanak pada padi varietas ir 64

Processing of parboiled rice consists of paddy cleaning, soaking, steaming, drying, and milling. Parboiled process of paddy is intended to increase the milling yield, to prevent nutrition losses and to decrease glychemic index. The purpose of this research is (1) To assess the impact of soaking time on the physical and chemical quality of parboiling rice, (2) To determine the optimum soaking time for parboiling rice and it’s impact on rice quality. This research is using IR 64 variant with soaking duration treatment about 4, 6, and 8 hours. The result showed that parboiled process increase the milling yield and reduce the rice amylose content. Gelatinization profile of the parboiled rice showed that the longer of soaking duration increase the trough viscosity, final viscosity, peak time viscosity, and pasting temperatures and also decreased the peak viscosity, breakdown viscosity, and setback viscosity. The treatment of soaking duration did not significantly affect the chemical contents of parboiled rice. The exposure time of paddy soaking that suggested is 4 hours in dip water at temperature of 60 oC.