生物法处理金矿含氰废水同步收金技术研究与应用  

Research and Application of Synchronous Gold Recovery Technology for Treating Cyanide-containing Wastewater from Gold Mines by Biological Method

作　　者：韩永群 田立国 张耀军 潘祖鸿 毛世宇 HAN Yongqun;TAN Linguo;ZHANG Yaojun;PAN Zuhong;MAO Shiyu(Guizhou Jinfeng Mining Co.,Ltd.,Xingyi 562200,Guizhou,China)

机构地区：[1]贵州锦丰矿业有限公司,贵州兴义562200

出　　处：《有色金属（冶炼部分）》2024年第3期140-147,共8页Nonferrous Metals（Extractive Metallurgy)

摘　　要：开展生物法处理金矿含氰废水同步收金技术研究,通过改良缺氧^(-)好氧生物处理工艺,成功驯化增殖了以硫杆菌、特吕珀菌、假单胞菌为主的CN^(-)、SCN^(-)高效降解菌群。在工业应用上,生物法对SCN^(-)、COD、CN^(-)、NH_(3)-N的平均去除率分别为99.99%、97.54%、93.92%和98.92%,处理后的出水各项污染物指标远低于《污水综合排放标准》(GB 8978—1996)一级标准。微生物在降解废水污染物的同时,通过自身的氧化、吸附、絮凝沉降等作用,对起始浓度低的混合含金废水进行金回收,金的回收率可达到91%,富集金品位300~400 g t,不仅深度处理了废水中各项污染物,同时回收了有价金属,是一种环境友好且无公害的含氰废水处理技术。The research and application of synchronous gold recovery technology for treating cyanide^(-)containing wastewater from gold mines by biological method was carried out.Through improving the anoxic^(-)aerobic organism biological treatment process,the highly efficient degrading bacteria groups of CN^(-)and SCN^(-),mainly Thiobacillus,Trupperia and Pseudomonas,were successfully domesticated and multiplied.In the industrial applications,the average removal rates of SCN^(-),COD,CN^(-),and NH_(3)-N by biological methods are 99.98%,97.63%,86.74%,and 98.70%,respectively.The various pollutant indicators of the treated effluent are far lower than the first level standard of the Comprehensive Wastewater Discharge Standard(GB 8978—1996).Microorganisms,while degrading pollutants in wastewater,recover gold from mixed gold^(-)containing wastewater with low initial concentration through their own oxidation,adsorption,flocculation and sedimentation.The gold recovery rate can reach 91%and the enriched gold levels ranging from 300 to 400 g t,which not only deeply treat various pollutants in wastewater,but also recover valuable metals.It is an environmentally friendly and pollution^(-)free treatment technology for cyanide^(-)containing wastewater.

关 键 词：含氰废水 SCN- 微生物 氨氮 生物接触氧化 活性污泥 

分 类 号：X52[环境科学与工程—环境工程] TF831[冶金工程—有色金属冶金]