| 摘要 |
PURPOSE:To obtain a water purifying method where trihalomethane, etc., are not generated and automatic operation is made with a small space even in a water purifying plant where contaminated raw water has to be used. CONSTITUTION:In the cases where a lot of organic substances are included in raw water, after a flocculant is added to the raw water to flocculate impurities, the raw water is filtrated by a membrane element and the filtrated water is applied with ozone treatment, activated carbon treatment, chlorine sterilization treatment, etc., to send it as purified water. On the other hand, in the cases where ammoniac nitrogen is included in raw water, after the raw water is applied with biological treatment to remove ammoniac nitrogen, the raw water is filtrated by a membrane element and the filtrated water is given active carbon treatment and chlorine sterilization treatment to send it as purified water while concentrated water is returned to a biological contact tank. |
