Treatment of spent caustic by three kinds of photocatalytic oxidation processes

The investigation of the performance of UV/H2 O2 , UV/O3 and UV/H2 O2/O3 oxidation systems treating spent caustic from an ethylene plant shows that in UV/H2 O2 system, with the increase of H2 O2 dosage, removal efficiencies of COD and the ratio of biochemical oxygen demand (BOD) to chemical oxygen demand (COD) of the effluent were increased and a better performance was obtained than the H2O2system alone. In UV/H2O2 system, removal efficiency of COD reached 68% under the optimum condition, and BOD/COD ratio was significantly increased from 0. 22 to 0. 52. In UV/O3 system, with the increase of O3dosage, removal efficiency of COD and BOD/COD ratio were increased, and a better performance was obtained than the O3 system alone. Under the optimum condition, removal efficiency of COD was 54%, and BOD/COD ratio was significantly increased from 0. 22 to 0. 48. In UV/H2O2/O3 system, COD removal efficiency was found to be 22.0%higher than UV/O3 system.

作 者： 余政哲 孫德智 史鵬飛 段曉東 李長海 杜龍弟   作者單位： Dept. of Environmental Science and Engineering, Harbin Institute of Technology, Harbin 150001 ,China  刊 名： 哈爾濱工業(yè)大學學報(英文版)  EI 英文刊名： JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY(NEW SERIES)  年，卷(期)： 2003 10(4)  分類號： X703  關鍵詞： spent caustic   photochemical oxidation   UV/O3 system   UV/H2 O2 system   UV/H2 O2/O3 system  

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