摘要：

在电镀废水进行处理中引入A²/O-MBR工艺,运行结果表明:在生化段进水COD 250～350 mg/L,氨氮45～60 mg/L,总磷2.0～3.0 mg/L,总铜、总镍、总锌均低于0.5 mg/L,DO控制为2～4 mg/L,硝化液回流比为200%,MLSS在3 500 mg/L左右的运行条件下,MBR出水水质良好且稳定,出水COD、氨氮、总磷、总铜、总镍、总锌分别为45、10、0.8、0.2、0.4、0.4 mg/L。同时该工艺具有较强的抗冲击负荷能力。

关键词: 电镀废水, 重金属, 膜生物反应器, 污水处理

Abstract:

Anaerobic-anoxic-oxic membrane bioreactor has been applied to the treatment of electroplating wastewater.The operation results show that the effluent water quality of system is good and stable under the following conditions ：in the biochemical section,its influent COD is 250-350 mg/L,ammonia nitrogen 45-60 mg/L,total phosphorus 2.0-3.0 mg/L,Cu²⁺ less than 0.5 mg/L,Ni²⁺ less than 0.5 mg/L,Zn²⁺ less than 0.5 mg/L,MLSS 3 500 mg/L,nitrification liquid reflux ratio 200% and DO 2-4 mg/L.The average effluent COD,NH₃-N,TP,Cu²⁺,Ni²⁺,Zn²⁺ are 45,10,0.8,0.2,0.4,0.4 mg/L,respectively.Furthermore,this process has stronger resistance to impact load.

Key words: electroplating wastewater, heavy metal, membrane bioreactor, wastewater treatment

中图分类号: 

• X703.1