TREATMENT OF CONCENTRATED CYANIDE WASTE-WATER

The effluent of Tufftride Process, a soft nitriding process for iron-r elated material, contains concentrated iron cyanide complex. Due to th e nature of the effluent, a treatment process employing conventional t echnology may become a complex one, For this reason, a simple advanced system with new technology has been hoped for. Since 1991, Water Reus e Promotion Center (WRPC), collaborating with Osaka Gas Co., Ltd. (OGC ) and Nihon Parkerizing Co., Ltd (NPC), has been working to develop a new process for treating concentrated cyanide wastewater using OGC cat alytic wet oxidation (CWO) process. Through the operation at NPC Senda i plant, it has been confirmed that the process is technically feasibl e and economically acceptable.