| 摘要 |
PURPOSE:To effectively remove a water-soluble substance, by contacting water after filtering treatment with ozone and passing the treated water through a particulate activated carbon bed to remove manganese before performing the addition of chlorine. CONSTITUTION:Ozone is injected in water after filtering treatment in an injection ratio of 3mg/l or less by a diffuser system or an ejector system to be reacted with manganese dissolved in water. The treated water is passed through an activated carbon adsorbing bed at a space velocity SV of 50hr<-1> or less. By this method, drinking water free from a malodor or uncomfortable feeling is obtained.
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