Abstract: Taking the advanced treatment process of coking wastewater tail water as an example,the effects of ozone on the removal of residual pollutants from tail water under different reaction time and pH conditions have been investigated,and the researches on ozone synchronous oxidation of coking wastewater tail water and the utili-zation of residual ozone tail gas accomplished. The results show that after a two-hour treatment by ozone-fluidized bed reactor,the removing rates of tail water COD and chromaticity are 49.1% and 82.6%,respectively,and the concentrations of volatile phenols,cyanide,and sulfide are below detection limits. The COD removing rate of tail water whose initial pH is 10.33 is better than that of tail water whose initial pH are 7.18 and 5.27. The consump-tion rate/COD removing rate of O₃ increases continuously with the lengthening of reaction time. The poly-ferric sul-fate(PFS)synthesized from residual ozone meets the requirements specified in national standard.

Key words: coking wastewater tail water, advanced treatment with ozone, fluidized bed, utilization of residual ozone

摘要： 以焦化废水尾水深度处理过程为例，考察不同反应时间和pH条件下臭氧对尾水中残余污染物的去除效果，并进行臭氧氧化焦化废水尾水和臭氧尾气利用研究。结果表明，经臭氧流化床反应器处理2 h后，尾水COD和色度的去除率分别为49.1%和82.6%，挥发酚、氰化物和硫化物的浓度均低于检测限，初始pH=10.33的尾水COD去除效果优于pH=7.18和pH=5.27的尾水，O₃消耗量/COD去除量的值随反应时间的延长不断增大；利用臭氧尾气制得的聚合硫酸铁达到了国标要求。

关键词: 焦化废水尾水, 臭氧深度处理, 流化床, 臭氧尾气利用

CLC Number: 

• X703.1