UV/Fenton处理磺化泥浆体系钻井废水  

Treatment of Drilling Wastewater by UV/Fenton Oxidation

作　　者：张红岩[1] 王伟财[1] 吕荣湖[1] 郭绍辉[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：《化学反应工程与工艺》2008年第3期257-262,共6页Chemical Reaction Engineering and Technology

基　　金：中国石油天然气集团公司十五攻关项目(04A50504)

摘　　要：采用 UV/Fenton 氧化处理磺化泥浆体系钻井废水.考察了 H_2O_2和 Fe^(2+)物质的量比、H_2O_2投加量和 pH 值等对废水处理的影响。结果表明,UV/Fenton 氧化不仅能有效去除钻井废水中的有机污染物,还可提高钻井废水的可生化性。随着 H_2O_2投加量的增加,有机污染物去除率也相应的提高.当 H_2O_2投加量为理论值的1.5倍(1.5 Qth)时,反应180 min,化学需氧量(COD)可从586 mg/L 降到90 mg/L,去除率达到84.6%,出水 COD 符合国家一级排放标准;当 H_2O_2投加量为0.6 Qth 时,反应30min.生化需氧量和化学需氧量的比值(BOD/COD)可从0.03提高到0.45.增大 Fe^(2+)投加量可提高有机污染物降解速率,但不能增加 COD 的去除率.反应适宜的 pH 值为3～5。建立了有机污染物降解动力学模型,模型和实验结果符合较好。UV/Fenton oxidation was used to treat drilling wastewater. The factors such as the molar ratio of H2O2 to Fe^2＋ , the dosage of H2O2 and pH value were investigated. The experimental results showed that UV/Fenton oxidation could not only effectively remove the components of chemical oxygen demand （COD）, but also enhanced the biodegradability of drilling wastewater. With the increasing of the dosage of H2O2, COD decreased. When the dosage of H2O2 was 1.5 times of theory quantity （1.5Qth） , COD decreased from 586 mg/L to 90 mg/L （the removal of COD was 84.6%） in 180 min, and the effluent could meet the integrated wastewater discharge standard. While the dosage of H2O2 was 0.6 Qth, the ratio of biochemical oxygen demand to chemical oxygen demand （BOD/COD） increased from 0. 03 to 0. 45 in 30 min. Adding the components of COD could be removed faster with more dosage of Fe^2＋ , but the removal efficiency of COD could not increased. The appropriate pH of the system was 3--5. Furthermore, the possible reactions in UV/Fenton system were divided into two groups based on the generation and consumption of hydroxyl radical. The kinetic model was proposed based on the removal of COD. The model agreed well with the experimental data.

关 键 词：紫外/Fenton 钻井废水 可生化性 动力学模型 

分 类 号：X703[环境科学与工程—环境工程]