PROBLEM TO BE SOLVED: To extremely reduce the number of bacteria in food materials or to sterilize the food material by briefly treating the food materials such as vegetables or fruits without using any harmful substances on a human body.SOLUTION: The sterilization processing method includes steps of: soaking the food materials such as vegetables or fruits in water solution of calcium oxide or calcium hydroxide supplying microscopic bubbles whose average grain diameter is 20-60 μm to the water solution and bringing the food materials in contact with the saturate aqueous solution and the microscopic bubbles for 5-20 minutes.COPYRIGHT: (C)2013,JPO&INPIT【課題】野菜又は果実等の食材を、人体に有害な物質を一切使用せずに短時間処理するだけで、食材の細菌数を極端に低減又は滅菌する。【解決手段】野菜又は果実等の食材を、酸化カルシウム又は水酸化カルシウムの水溶液中に浸漬し、かつ同水溶液中に平均粒径が20~60μmの微細気泡を供給し、食材に前記飽和水溶液と前記微細気泡を5~20分間接触せしめる。【選択図】 図1