STERILIZATION METHOD FOR WATER WITH OXIDATION REDUCTION POTENTIAL RANGING FROM -400 mV TO -600 mV

PROBLEM TO BE SOLVED: To provide a sterilization method for water with an oxidation reduction potential ranging from -400 mV to -600 mV, capable of being supplied as drinking, while keeping the oxidation reduction potential as it is. SOLUTION: In this method, 700 ml tap water at 10°C water temperature is subjected to sterilization and dechlorination. The water is further subjected to microfiltration to remove abnormal taste, odor and impurities therefrom. Hydrogen gas is blown to the water under the 0.5 MPa gas pressure for 3 minutes while contacting to a reduction catalyst wherein a metal is carried by a silica base granite porphyry, thereby making the oxidation reduction potential to be -562 mV at pH 7.2. Then, the water is filled in a pouch of a three-layer structure having 200 ml volume wherein the outermost layer is a biaxially-stretched polyethylene terephthalate film (thickness of 12 μm), the intermediate layer is an aluminum foil (thickness of 9 μm) and the innermost layer is a special polyester film (thickness of 40 μm). Then, the pouch is sterilized at 85°C for 30 minutes. COPYRIGHT: (C)2005,JPO&NCIPI