PROBLEM TO BE SOLVED: To provide sterile rice powders suitable for a material for manufacturing raw processed products.SOLUTION: A liquid sterilization process which includes dipping raw rice for an appropriate period of time in an aqueous solution containing enzymes such as hemicellulase, pectinase, pectinesterase that can hydrolyze or soften the cell membranes of rice grains, and then dipping the raw rice in a sterilizing aqueous solution for an appropriate period of time for washing is performed. Dewatering, drying and refining are performed. Further, a drying process is performed while the temperature of the rice powders is kept at 50°C or lower. Also, the rice powders are air-stirred in a sterilizing atmosphere as a gas sterilization process to manufacture the sterile rice powders.COPYRIGHT: (C)2013,JPO&INPIT【課題】生加工品の製造材料として適する無菌状態の米粉を提供する。【解決手段】米粒の細胞膜を加水分解し又は軟化せしめるヘミセルラーゼ、ペクチナーゼ、ペクチンエステラーゼ等の酵素含有水溶液に原料米を適宜時間浸漬した後、殺菌用水溶液に適宜時間浸漬して洗浄する液体殺菌処理を行い、水切り乾燥並びに微細粉化し、更に米粉温度を50℃以下に抑えながら乾燥処理を行うと共に、殺菌用雰囲気内で気中攪拌して気体殺菌処理を行って製出する。【選択図】図1
