| 摘要 |
PROBLEM TO BE SOLVED: To provide a water treatment method which is capable of improving the efficiency and treatment speed of a water purifying treatment of an enormous water volume of rivers, lake water, etc., contaminated by industrial waste and various other materials. SOLUTION: This water treatment method consists in arranging a pair of impression electrodes 2A, 2B and a grounding electrode 1 held in proximity to these impression electrodes in the water to be treated, using the electrodes consisting of metals having a high electrolytic characteristic as the impression electrodes and lowering the oxidation reduction potential of the water by impressing AC to a pair of the impression electrodes 2A, 2B. In this method, the water purifying treatment efficiency is improved by forming a portion which contains a signal generator for controlling an AC frequency, controls the oscillation frequency in correspondence to the signal and changes to rapid increasing or decreasing during the gentle frequency fluctuation and adding a colloidal soln. to the water.
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