生物法处理锌镍合金电镀废水方法研究

Study on Biological Treatment of Zinc-Nickel Alloy Electroplating Wastewater

针对锌镍合金电镀废水存在着难降解、生化性差、重金属等毒性物质含量较高的特点,采用常规的活性污泥处理技术,通过对活性污泥驯化过程及稳定过程进行研究,验证了活性污泥对此类电镀废水降解的可行性。结果表明,在一定的处理工艺和驯化周期内,活性污泥工艺可对锌镍合金电镀废水COD进行降解,并稳定达到GB 21900-2008排放要求。采用二次芬顿与好氧生物处理结合的工艺可将原水COD降低至50 mg/L,总去除率达到91.45%。

Aimed at the characteristics of zinc-nickel alloy electroplating wastewater of refractory degradation,poor biodegradability and high concentration of toxic substances such as heavy metals.Conventional activated sludge treatment process has been used,through the study of cultivation and domestication process of the activated sludge,the feasibility of activated sludge process for the treatment of zinc-nickel alloy electroplating wastewater was verified.The results showed that the activated sludge process could degrade the COD under a certain treatment process and domestication period,and the effluent COD met the discharge requirement of GB 21900-2008.The COD reduced to 50 mg/L by the combined process of multi-Fenton and aerobic biological treatment,and the total removal rate reached 91.45%.