摘要： 针对钻井液废水COD高、浊度高、难于生化降解的特点，采用臭氧-Fenton联合氧化工艺对其进行处理。结果表明，与单独使用臭氧氧化和Fenton氧化相比，联合氧化工艺对钻井液废水具有更好的处理效果。采用臭氧-Fenton联合氧化工艺处理废水的最佳条件：pH=9，先通臭氧处理30 min，臭氧投加量为3 mg/L；再加入Fenton试剂，n（H₂O₂）/n（Fe²⁺）为10：1，反应时间为60 min。在上述条件下，COD去除率达到了95.1%，废水可达标排放。

关键词: 臭氧氧化, Fenton氧化, 联合氧化, 钻井液废水

Abstract: Since drilling fluid wastewater is characterized by high COD,high turbidity and refractory biodegradation,it has been treated by ozone-Fenton combined oxidation process. The results show that the combined oxidation process has better effect on the drilling fluid wastewater,compared with the method using ozone oxidation and Fenton oxidation separately. The optimum conditions for treating the wastewater by ozone-Fenton combined oxidation process are as follows:pH=9,ozone treatment 30 min,ozone dosage 3 mg/L,then adding Fenton reagent,n(H₂O₂)/n(Fe²⁺) is 10:1, and reaction time 60 min. Under the above conditions,its COD removing rate is 95.1%,reaching the wastewater discharge standards.

Key words: ozone oxidation, Fenton oxidation, combined oxidation, drilling fluid wastewater

中图分类号: 

• X741