| 摘要 |
Provided are a water treatment method and a water treatment system whereby COD (Chemical Oxygen Demand) can be removed at a high removal rate. A method for removing COD comprising adding a chlorine-based oxidizing agent to organic matter-containing water to be treated and passing the water through a manganese-based filtering material to thereby catalytically oxidize and decompose the organic matters, wherein said manganese-based filtering material comprises a natural manganese dioxide (MnO2) crystal powder containing ß-MnO2 which is held on the surface of a granular support by using a binder, without sintering or baking the crystal powder or heating the same to a temperature at which the crystalline transformation of ß-MnO2 occurs. |
