抄録
Plating waste liquid collected for disposal from electroplating plants, contains large amounts of complex cyanide and organic matter in varying concentration so.
Such liquid was conventionally treated using a boil-down method but this involved problems with the complex cyanide that remained in the resulting sludge and the high cost of treatment.
We applied thermal-hydrolysis to treatment of such waste liquid and succeeded in decomposing the complex cyanide and removing the metal from it by adding two-step sulfide division to the process.
