Abstract：
In this study, further treatment of coking wastewater treated in anoxic-oxic-membrane bioreactor (A2O-MBR) was investigated to meet the standards of the ministry by means of nanofiltration (NF) (with two different membranes and different pressures), microfiltration -powder activated carbon (MF-PAC) hybrid system and NF-PAC (with two different membranes and five different PAC concentrations) hybrid system. In addition to the parameters determined by the ministry, other parameters such as ammonium, thiocyanate (SCN-), hydrogen cyanide (HCN), dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), color were also examined to evaluate the flux performance and treatment efficiency of the hybrid processes. According to the results, chemical oxygen demand (COD) in the NF process, COD and total cyanide (T-CN) in the MF-PAC process could not meet the discharge standards. As for the NF-PAC hybrid system, XN45 membrane met the discharge standards in all parameters (COD = 96±1.88 mg/L, T-CN =<0,02 mg/L, phenol =<0.05 mg/L), with a recovery rate of 78% at 0.5 g/L PAC concentration.
摘要：
在这项研究中,通过纳滤（NF）（具有两种不同的膜和不同的压力），研究了在缺氧-氧膜生物反应器（A2O-MBR）中处理的焦化废水的进一步处理，以满足该部的标准，微滤-粉末活性炭（MF-PAC）混合体系和NF-PAC（具有两种不同的膜和五种不同的PAC浓度）混合体系。除了该部确定的参数外，其他参数，如铵，硫氰酸盐（SCN-），氰化氢(HCN),溶解有机碳(DOC)溶解无机碳(DIC)，还检查了颜色以评估混合工艺的通量性能和处理效率。根据结果,NF过程中的化学需氧量（COD），MF-PAC工艺中的COD和总氰化物（T-CN）不能达到排放标准。至于NF-PAC混合动力系统，XN45膜各项指标均达到排放标准(COD=96±1.88mg/L,T-CN=<0.02mg/L,苯酚=<0.05mg/L)，在0.5g/LPAC浓度下的回收率为78%。
