臭氧催化氧化处理制药废水连续性实验研究
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摘要
采用NixO-FxO/陶粒催化剂在大高径比的管式反应器中进行臭氧催化氧化连续性实验,研究催化剂投加量、臭氧投加量、反应停留时间、气液接触方式等工艺条件对制药废水的处理效果和稳定性的影响。实验表明,催化氧化连续实验最佳工艺条件为:停留时间90 min,臭氧气体通量为1 L/min,臭氧浓度为96.61 mg/L,臭氧利用率可达到92.8%左右,气液接触方式逆流略优于并流效果。在臭氧催化氧化连续运行96 h,臭氧催化氧化去除制药废水COD可稳定在58%以上。
An ozone catalytic oxidation process was carried out in a tubular reactor with NixO-F x O/ceramic catalyst.Under continuous conditions,the influence of the amount of catalyst,the dosage of ozone,the HRT and the contact mode of gas and liquid on the effect and stability of catalyst on the treatment of pharmaceutical wastewater were studied.The results showed that the optimum conditions for continuous catalytic oxidation were: residence time 90 min,ozone gas flux 1 L/min and ozone concentration of 96.61 mg/L,the ozone utilization rate is 92.8%,and it is proved that the counter current of gas liquid contact way is slightly better than flow effect.Ozone catalytic oxidation for continuous operation of 96 h,ozone catalytic oxidation to remove pharmaceutical wastewater COD can be stabilized above 58%.
An ozone catalytic oxidation process was carried out in a tubular reactor with NixO-F x O/ceramic catalyst.Under continuous conditions,the influence of the amount of catalyst,the dosage of ozone,the HRT and the contact mode of gas and liquid on the effect and stability of catalyst on the treatment of pharmaceutical wastewater were studied.The results showed that the optimum conditions for continuous catalytic oxidation were: residence time 90 min,ozone gas flux 1 L/min and ozone concentration of 96.61 mg/L,the ozone utilization rate is 92.8%,and it is proved that the counter current of gas liquid contact way is slightly better than flow effect.Ozone catalytic oxidation for continuous operation of 96 h,ozone catalytic oxidation to remove pharmaceutical wastewater COD can be stabilized above 58%.
引文
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[6]孟冠华,刘宝河,万彤,等.Cu/C-Al2O3催化臭氧氧化印染废水[J].工业水处理,2014,34(10):41-44.
[7]Chen Chunmao,Chen Hongshuo,Guo Xuan,et al.Advanced ozone treatment of heavy oil refining wastewater by activated carbon supported iron oxide[J].Journal of Industrial&Engineering Chemistry,2014,20(5):2782-2791.
[8]中华人民共和国环保部.HJ 828-2017水质化学需氧量的测定重铬酸盐法[S].北京:中国环境科学出版社,2017.
[9]Chen C,Wei L,Guo X,et al.Investigation of heavy oil refinery wastewater treatment by integrated ozone and activated carbon-supported manganese oxides[J].Fuel Processing Technology,2014,124(4):165-173.
[10]Zhao L,Ma J,Sun Z,et al.Mechanism of heterogeneous catalytic ozonation of nitrobenzene in aqueous solution with modified ceramic honeycomb[J].Applied Catalysis B Environmental,2009,89(3):326-334.
[12]Zhang T.Catalytic ozonation of trace nitrobenzene in water with synthetic goethite[J].Journal of Molecular Catalysis A Chemical,2008,279(1):82-89.
[13]Lan B,Huang R,Li L,et al.Catalytic ozonation of p-chlorobenzoic acid in aqueous solution using Fe-MCM-41 as catalyst[J].Chemical Engineering Journal,2013,219(3):346-354.
[14]郑天龙,田艳丽,阿荣娜,等.微气泡-臭氧和微孔-臭氧工艺深度处理腈纶废水的对比研究[J].环境工程,2014,32(8):53-58.
[15]Zheng T,Wang Q,Zhang T,et al.Microbubble enhanced ozonation process for advanced treatment of wastewater produced in acrylic fiber manufacturing industry[J].Journal of Hazardous Materials,2015,287(287):412-420.
[16]Li X,Chen W,Ma L,et al.Industrial wastewater advanced treatment via catalytic ozonation with an Fe-based catalyst[J].Chemosphere,2018,195:336-343.
[17]国家环境保护局.GB/T 11914-1989水质化学需氧量的测定重铬酸盐法[S].北京:中国标准出版社,2004.
[18]Zhuang H F,Han H J,Hou B L,et al.Heterogeneous catalytic ozonation of biologically pretreated Lurgi coal gasification wastewater using sewage based activated carbon supported manganese and ferric oxides as catalysts[J].Bioresource Technology,2014,166:178-186.