A NOVEL PROCESS FOR TREATMENT OF EFFLUENT FROM COPPER MANUFACTURING PROCESS

摘要

The present invention relates to a method for treating an effluent generated in a copper manufacturing/refining plant comprising the steps of controlled addition of water soluble sulfide or hydrogen sulfide to the effluent to selectively precipitate out copper sulfide (CuS); followed by controlled addition of water soluble sulfide or hydrogen sulfide to the effluent to selectively precipitate out arsenic sulfide (As2S3); and controlled addition of lime slurry to the effluent to precipitate out gypsum. The process also relates to recovery purified water from the effluent generated during copper manufacturing process, wherein the purified water is recycled back for the copper manufacturing process.