| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus for generating slightly acidic electrolyzed water with a pH region where hypochlorous acid can be stably present, without causing the complication of the apparatus and the complication of control and also without adding a chemical containing solid matter to electrolyzed water. SOLUTION: Immediately before electrolysis, hydrochloric acid with a relatively high concentration is diluted and adjusted using generated slightly acidic electrolyzed water to prepare dilute hydrochloric acid and the electrolysis is performed using the dilute hydrochloric acid as an electrolysis original liquid. In this way, the secondarily generated hydrochloric acid contained in the slightly acidic electrolyzed water is electrolyzed again, thus the hydrochloric acid in the electrolyzed water can be reduced, further, when electrolysis current is controlled by the electric conductivity of the electrolysis original liquid and when the dilution is performed with the slightly acidic electrolyzed water instead of water, the amount of the hydrochloric acid to be used is also reduced according to the electric conductivity of the slightly acidic electrolyzed water higher than that of water, thus the increase in the pH of the generated slightly acidic electrolyzed water can be counted on. COPYRIGHT: (C)2008,JPO&INPIT
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