UV/O_3氧化处理磺化泥浆体系钻井废水  

Treatment of drilling wastewater by UV/O_3

作　　者：张红岩[1] 吕荣湖[1] 王伟财[1] 

机构地区：[1]中国石油大学(北京)化学科学与工程学院,北京102249

出　　处：《工业水处理》2009年第2期29-32,共4页Industrial Water Treatment

基　　金：中国石油天然气集团公司"十五"攻关项目(04A50504)

摘　　要：用紫外光催化—臭氧(UV/O3)氧化处理磺化泥浆体系钻井废水,考察了pH、初始COD、臭氧投加量等因素的影响。结果表明:由于钻井废水中含有羟基自由基可清除碳酸氢根离子,所以钻井废水UV/O3氧化在pH为3.0时的效果好于中性和碱性条件;初始浓度的降低和臭氧投加量的增多均可提高UV/O3氧化去除钻井废水COD的速率,但是随着臭氧投加量的增多,相应的臭氧指数(OI)显著增大。当臭氧投加量为810mg/h时,氧化60minCOD可从647mg/L降至96mg/L,但臭氧指数高达4.52,显得并不经济。由于UV/O3氧化可大大提高钻井废水的可生化性,所以可以先用UV/O3预氧化钻井废水,然后再用生物法处理,这样可大幅降低处理费用。UV/O3 has been used for treating drilling wastewater. The influential factors such as pH, initial COD and the dosage of ozone are investigated. The experimental results show that when pH is 3.0, the removal rate of COD is much faster than pH is 7.8 to 10.0 owing to the bicarbonate in drilling wastewater. The decreasing of initial concentration and increasing of the dosage of ozone can increase the UV/O3 oxidation removal rate of the drilling wastewater COD. But with the increasing of ozone, the corresponding ozone index（OI） enhances remarkably. Though COD can decrease from 647 mg/L to 96 mg/L, when the ozone dosage is 810 mg/h and oxidized for 60 min, it is far from economic due to the large ozone index which is as high as 4.52. Since UV/O3 can enhance the biodegradability of drilling wastewater, it can be used for preoxidizing the drilling wastewater before the biological treatment. Thus, the treatment cost can be decreased greatly.

关 键 词：UV/O3 钻井废水 可生化性 羟基自由基 

分 类 号：X703.1[环境科学与工程—环境工程]