| abstract |
Provided is a phosphorus removal method capable of removing phosphorus by agglomeration and precipitation with high efficiency in water. An iron compound such as ferrous sulfate, ferric sulfate, ferrous chloride, ferric chloride, ferrous oxide, ferric oxide, and triiron tetroxide is added to water in the treatment tank 3. A method in which divalent iron ions dissolved in water are aerated with ozone from the ozone generator 4 in the water, a method of irradiating with ultraviolet rays, a method of irradiating ultraviolet rays or sunlight in contact with a photocatalyst. , By adding an oxidizing agent such as hypochlorous acid, a method of adding aerobic bacteria, etc., to change to trivalent iron ions, thereby adsorbing phosphorus present in water to make iron phosphate not soluble in water, Thereafter, the iron phosphate is removed. [Selection] Figure 10 |