| Treatment of spent caustic by three kinds of photocatalyticoxidation processes |
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| 作者姓名： | 余政哲 孙德智 史鹏飞 段晓东 李长海 杜龙弟 |
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| 作者单位： | Dept. of Environmental Science and Engineering，Harbin Institute of Technology，Dept. of Environmental Science and Engineering，Harbin Institute of Technology，Dept. of Environmental Science and Engineering，Harbin Institute of Technology，Dept. of Environmental Science and Engineering，Harbin Institute of Technology，Dept. of Environmental Science and Engineering，Harbin Institute of Technology，Dept. of Environmental Science and Engineering，Harbin Institute of Technology Harbin 150001，China，Harbin 150001，China，Harbin 150001，China，Harbin 150001，China，Harbin 150001，China，Harbin 150001，China |
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| 摘 要： | 0 INTRODUCTIONCurrentprocessforethyleneproductionisnotenvi ronmentfriendly ,becausealargeamountofspentcausticisdischargedduringthescrubbingofthecrackinggas ,whichcontainshighconcentrationsulfideandorganiccompounds.Sometechniqueshavebeenappliedtotreatthespentcaustic ,includingchemicaloxidation ,neutral izationandprecipitation1～ 3] .However ,lowremovaleffi ciencyandsecondpollutionarecommonlyinvolvedinthesetechniques .Althoughwetairoxidationprocesscanefficientlyremoveorganiccompoundsinspe…
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Treatment of spent caustic by three kinds of photocatalytic oxidation processes |
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| YU Zheng-zhe,SUN De-zhi,SHI Peng-fei,DUAN Xiao-dong,LI Chang-hai,DU Long-di.Treatment of spent caustic by three kinds of photocatalyticoxidation processes[J].Journal of Harbin Institute of Technology,2003,10(4). |
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| Authors: | YU Zheng-zhe SUN De-zhi SHI Peng-fei DUAN Xiao-dong LI Chang-hai DU Long-di |
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| Abstract: | The investigation of the performance of UV/H_2O_2, UV/O_3 and UV/H_2O_2/O_3 oxidation systems treating spent caustic from an ethylene plant shows that in UV/H_2O_2 system, with the increase of H_2O_2dosage, 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 H_2O_2system alone. In UV/H_2O_2 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/O_3 system, with the increase of O_3dosage, removal efficiency of COD and BOD/COD ratio were increased, and a better performance was obtained than the O_3system 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/H_2O_2/O_3 system, COD removal efficiency was found to be 22.0% higher than UV/O_3 system. |
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| Keywords: | spent caustic photochemical oxidation UV/O_3 system UV/H_2O_2system UV/H_2O_2/O_3 system |
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