电化学-膜分离法组合工艺深度处理化工废水中水研究

Study on Advanced Treatment and Reuse of Chemical Industry Wastewater by Combined Process of Electrochemical-Membrane Separation Method

为有效处理利用化工企业废水,实现工业废水“零排放”。本研究采用了电化学-膜分离的组合工艺对化工企业排放的中水进行深度处理,并比较了电化学-微滤-反渗透,超滤-两级反渗透组合工艺对化工企业废水深度处理效果,来获得最优化的“零排放”工艺组合。结果发现,电化学-微滤-反渗透组合工艺对于COD、TN、TP的去除效果与超滤-反渗透-反渗透组合工艺大致相当,COD去除率皆接近100%。通过对不同处理工艺的三维荧光光谱分析发现,电化学-微滤-反渗透组合工艺去除的有机物的主要组分为蛋白质类物质以及腐殖酸类物质。综合不同工艺的处理效能,电化学-微滤-反渗透组合工艺可获得较高品质的出水,实现化工废水近零排放。

To effectively treat and utilize the wastewater of the chemical industry and achieve the"zero discharge"of industrial wastewater.In this study,the combined electrochemical-membrane separation process was used for the advanced treatment of the reclaimed water discharged by the chemical industry.The efficacy of wastewater treatment combination of electrochemical,microfiltration and reverse osmosis(E-MF-RO),ultrafiltration and two-stage reverse osmosis process(UF-RO-RO)was compared.The results showed that the COD,TN,and TP removal of the E-MF-RO process was roughly equivalent to that of the UF-RO-RO process,both of the COD removals were close to 100%.Through the analysis of three-dimensional fluorescence spectroscopy of different treatment processes,it is found that the major organics removed by this process were protein substances and humic acid substances.It can be suggested that the combined E-MF-RO process could obtain high-quality effluent and achieve near-zero discharge of chemical wastewater.