Abstract:

Since the COD,total cyanide compounds and chroma of biochemically treated coal gasification wastewa-ter did not reach the discharge standard,the treatment effects of catalytic ozonation technology on coal gasificationwastewater have been studied through experiments. The effects of reaction time,pH,and catalyst on catalytic ozona-tion efficiency are investigated. The experimental results show that when reaction time is>30 min,and pH is between9-12,ozone has higher oxidation efficiency. The COD removing rate of coal gasification wastewater reaches 65.3% ，when the reaction time is 30 min and pH=9. Catalyst TS-2 can improve the COD removing rate to 66.9%,an increas-ing rate of 1.6%,and about 5 min is reduced,reaching the best reaction time.

Key words: ozone, advanced oxidation, catalyst, coal gasification wastewater

摘要：

经生化法处理后的煤气废水,COD、总氰化合物、色度没有达到排放标准。通过实验研究了臭氧催化氧化技术对煤气废水的处理效果,并考察了反应时间、pH、催化剂对臭氧氧化效果的影响。实验结果表明,当反应时间>30 min、pH在9~12,臭氧有较高的氧化效率;当反应时间为30 min、pH=9时,煤气废水COD的去除率达到65.3%。TS-2型催化剂的使用使煤气废水COD去除率提高到66.9%,增加了1.6%。达到最佳时的反应时间降低了5 min。

关键词: 臭氧, 高级氧化, 催化剂, 煤气废水

CLC Number: 

• X703.1