一种处理含重金属离子电镀废水的新工艺

研究了用微电解-生物膜法复合工艺处理含重金属离子和氰离子的工业电镀废水,并与单一生物膜法处理进行了比较。结果表明,单一生物膜法对废水中的Zn2+、Cr6+和CN-的去除率分别为 50 5%、99 99%和95 8%。以不锈钢材料作阴、阳极,复合工艺相对于单一生物膜工艺对Zn2+、Cr6+和CN-的去除率均有不同程度的提高,最显著的是Zn2+的去除率由 50 5%提高到 72%;复合工艺最佳反应循环量和压缩空气用量分别为15~30mL/min和 0 3m3 /h。

A Novel Technology of Treating Plating Wastewater Containing Heavy Metal Ions

The industrial plating wastewater containing heavy metal ions and cyanide ion were treated by electrolysis-biofilm process in comparison with the single biofilm process.The results show that,the removal rate of Zn~(2+),Cr~(6+) and CN~ during the single biofilm process are 50.5%,99.99% and 95.8%.By contrast,using stainless steel as electrode material the removal rates of three ions have relevant increase and the removal rate of Zn~(2+) has remarkable increase from 50.5% to 72%.The optimal feed flow and gas flux experimented by 15~30 mL/min and 0.3m~3/h respectively.