山东某金矿废水脱氰降COD的试验研究  

A Test Study of Cyanide Removal and COD reduction for the Effluent of a Gold Mine in Shandong Province

作　　者：隆岗 陈敏 徐兆鹏 温建波 LONG Gang;CHEN Min;XU Zhao-peng;WEN Jian-bo

机构地区：[1]中矿金业股份有限公司,山东招远265400

出　　处：《有色冶金节能》2021年第4期54-57,共4页Energy Saving of Nonferrous Metallurgy

摘　　要：以山东某金矿高COD、高氰废水为研究对象,以脱除废水中的COD和CN-为目的,首先进行了探索性试验,对比了双氧水、次氯酸钠和臭氧的氧化效果,确定了臭氧氧化的有效性。随后考察了废水pH值、臭氧用量、反应温度和反应时间对臭氧氧化过程的影响并进行了优化。结果显示,在臭氧气流速度1.5 L/min,pH=11,反应温度45℃,反应时间90 min的条件下,COD和CN-的脱除率分别能够达到95.7%和96.2%,满足废水回用要求。The effluent of a gold mine in Shandong has high COD and cyanide content.To remove/reduce these substances,a pilot test was carried out to compare the oxidation effect of hydrogen peroxide,sodium hypochlorite,and ozone,and the potency of ozone was verified.Then the effect of pH,ozone dosage,reaction temperature and duration upon the oxidation process were studied and optimization was conducted.The study showed that when ozone is injected at 1.5 L/min,with pH=11,reaction temperature at 45℃and reaction lasting 90 min,the removal efficiency of COD and CN-can reach 95.7%and 96.2%respectively,which satisfied the effluent reuse requirements.

关 键 词：COD 氰根 含氰废水 臭氧 氧化效果 脱除率 

分 类 号：TF803[冶金工程—有色金属冶金] X703[环境科学与工程—环境工程]