Device for treating wastewater containing gallium and gallium-containing waste water treatment metho

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PROBLEM TO BE SOLVED : To provide a treatment apparatus for gallium-containing waste water in which gallium-containing waste water discharged from a wafer manufacturing plant, a device manufacturing plant for a compound semiconductor is treated to efficiently recover gallium in high concentration, in particular, which is a rare and useful metal. SOLUTION : The treatment apparatus for the gallium-containing waste water has a solid liquid separation means for removing a suspended solid in the gallium-containing waste, a gallium adsorption means for adsorbing gallium in the treated water in the solid liquid separation means, a gallium releasing means for bringing a liquid into contact with the gallium adsorption means to release gallium adsorbed in the gallium adsorption means and a gallium concentrating means for concentrating the liquid containing the released gallium.