Abstract: Taking an actual emulsion wastewater from metal processing industry as research object,a two-stage combined process containing K2FeO4 assisted polyaluminum chloride (PAC) coagulation precipitation method followed by boron-doped diamond electrode (BDD) electrochemical oxidation method is studied.Influences of the mass concentrations PAC and K2FeO4,sedimentation time,current density,initial pH and reaction temperature of the two-stage process on the pollutant treatment effect are investigated.It is shown that the mixed use of K2FeO4 and PAC can effectively promote the flocculation and sedimentation effect of PAC,and BDD anode electrolysis can form efficient mineralization of the remaining CODCr after flocculation and precipitation.Main indexes such as CODCr,NH3-N and turbidity all meet China' first-class standard of integrated wastewater discharge (GB 8978—1996).
武世煊, 张峰, 杨帆, 李红艳, 崔佳丽, 王朝旭, 崔建国. 高铁酸钾辅助PAC混凝沉淀+电化学氧化处理乳化液废水研究[J]. 现代化工, 2021, 41(2): 193-197,202.
WU Shi-xuan, ZHANG Feng, YANG Fan, LI Hong-yan, CUI Jia-li, WANG Chao-xu, CUI Jian-guo. Study on joint treatment of emulsion wastewater by potassium ferrate-assisted PAC coagulation precipitation and electrochemical oxidation. Modern Chemical Industry, 2021, 41(2): 193-197,202.
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