PURPOSE:To efficiently treat water dissolving various organic compds. and make it harmless, by adjusting the water to be treated at pH=6.5, adding a reducing material to lower oxidation-reduction potential in the water to lower than a prescribed level to remove oxidative material, and at the same time, using a metallic reducing agent for transforming organic compounds to be harmless. CONSTITUTION:Organic compds.-containing water to be treated is adjusted at pH=6.5, and at the same time, a reductive material (e.g., sodium sulfite) to lower oxidation-reduction potential in the water to =300mV is added to the water so as to remove oxidative materials such as dissolved oxygen in the water. In that condition, organic compds. are efficiently made harmless by using metallic reducing agents. At that time, chlorine ion and oxidative ion-free electrolyte (e.g., sodium sulfate) are added to accelerate anodic reaction on the metal interface, resulting in quick transformation of the organic compds. into harmless ones.
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