Abstract
A thermo hydrolysis process was recently applied to the waste water treatment for effluent containing ferro-cyanide. This process is effective for harmless cyanide, but ammonia and formate, which are harmful materials, are produced. Due to regulation for limiting nitrogen released to water, it became necessary to treat not only the cyanide, but also ammonia, in waste water. A catalytic wet oxidation process is applied for the cyanide and the ammonia, but this process has to use 2 stages of treatment, one each for cyanide and ammonia. A high temperature oxidation process was developed for the waste water treatment of effluent with ferro-cyanide and ammonia.
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