MBR工艺深度处理印刷电路板废水的研究

Study on Advanced Treatment of Printed Circuit Board Wastewater By MBR Process

分别采用陶瓷膜和超滤膜生物反应器对某印刷电路板(PCB)厂现有废水处理厂出水进行深度处理研究。结果表明:在进水COD 191.2?270.4 mg/L,氨氮30?50 mg/L,MLSS 6 500 mg/L,DO 4?8 mg/L,反应时间为5 h的条件下,两种膜生物反应器出水COD和氨氮的浓度分别低于99.2 mg/L和0.759 mg/L,达到《污水综合排放标准》(GB8978-1996)中的一级排放标准。

The ceramic and hollow fiber ultrafiltration membrane bioreactors were separately applied for advanced treatment of the printed circuit board （PCB） wastewater. The results show that ,when concentration of dissolved oxygen （DO） is 4.0-8.0 mg/L, hydrodynamic retention time （HRT） is 5 h, MLSS is 6500 mg/L, COD and ammonia nitrogen are 191.2-270.4 mg/L and 30.0-50.0 mg/L respectively, COD and ammonia nitrogen in the effluent from membrane bioreactors are less 99.2 mg/L and 0.759 mg/L respectively;The quality of treated wastewater can meet the first grade of lntegrated Wastewater Discharge Standard GB8978-1996.