基于高级氧化技术处理乙烯生产废碱液的研究

研究了UV／H2O2，UV／O3和UV／H2O2／O3三种高级氧化体系处理乙烯装置所排放废碱液的特点。对于UV／H2O2体系，随着H2O2剂量的增加，COD的去除率以及处理液的可生化性(BOD：COD值)都随之增大，其性能也好于单独的H2O2体系，该体系在最佳条件下，COD的去除率达到68％，BOD／COD值从0．22增大到0．52；对于UV／O3体系，随着O3剂量的增加，COD的去除率及处理液的可生化性(BOD：COD值)也都随之增大，其性能也好于单独的O3体系。该体系在最佳条件下，COD的去除率达到54％，可生化性(BOD／COD值)从0．22增大到0．48；对于UV／H2O2／O3体系，其COD去除率比UV／O3体系高出22．0％。

The Study of Treatment for Organics of Spent Caustic Form Ethene Plant Based on Advanced Oxidation Processes

The performance of UV/H 2O 2 UV/O 3 and UV/H 2O 2/O 3 oxidation systems for treating spent caustic from an ethylene plant was investigated. In UV/H 2O 2 system,with the increase of H 2O 2 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 obtainced than the H 2O 2 system alone. In UV/H 2O 2system, removal efficiency of COD reach 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 3 dosage,removal efficiency of COD and BOD/COD ratio were increased, and a better performance was obtained than the O 3 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/H 2O 2/O 3 system, COD removal efficiency was found to be 22.0% higher than UV/O 3 system.