To provide a desalting method for high concentration salts-containing organic waste water, and an apparatus therefor.
Salts-containing treated water obtained by treating the high concentration salts-containing organic waste water by the combination of biological treatment, coagulation treatment, and solid-liquid separation membrane treatment is subjected to multistage concentration using a plurality of evaporators to deposit and separate salts. Organic matter in the salts-containing treated water is removed by activated carbon absorption treatment or/and ozone oxidation treatment beforehand, and then fed to a first stage evaporator. A calcium salt, and the like, contained in the salts-containing treated water are removed beforehand as carbonates before or after the first stage evaporator.
COPYRIGHT: (C)2006,JPO&NCIPI
Norihiro Shimura
Yoshio Kamono
Masamichi Maki
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