微电解—Fenton氧化—絮凝组合工艺处理油田压裂废水  

Treatment of oilfield fracturing wastewater by combination process of micro-electrolysis-Fenton oxidation-flocculation

作　　者：王顺武[1] 李子旺[1] 赵晓非[1] 于庆龙 

机构地区：[1]东北石油大学化学化工学院石油与天然气化工黑龙江省重点实验室,黑龙江大庆163318 [2]中国石油大庆油田有限责任公司第四采油厂,黑龙江大庆163511

出　　处：《化工环保》2016年第4期434-438,共5页Environmental Protection of Chemical Industry

基　　金：黑龙江省教育厅科学技术研究项目(12531061)

摘　　要：采用微电解—Fenton氧化—絮凝组合工艺处理油田压裂废水,优化了工艺条件。实验结果表明:最佳工艺条件为初始废水p H 3.0、铁屑加入量1.5 g/L(铁屑与活性炭的质量比1∶1)、微电解时间80 min、Fenton氧化时间120 min、H2O2加入量940 mg/L,阳离子聚丙烯酰胺加入量120 mg/L;在最佳工艺条件下处理废水后,COD由3116.0 mg/L降至681.3 mg/L,总COD去除率达78.1%,3个工段的COD去除率依次为33.1%,37.9%,7.1%,出水水质满足现场回注标准(SY/T 5329—2012《碎屑岩油藏注水水质推荐指标及分析方法》);该组合工艺对废水的处理效果远优于单独微电解、Fenton氧化或絮凝工艺,且方法简单易行、药剂利用率高。The oilfield fracturing wastewater was treated by combination process of micro-electrolysis-Fenton oxidation-flocculation, and the process conditions were optimized. The experimental results show that： Under the optimum process conditions of initial wastewater pH 3.0, iron filings dosage 1.5 g/L （the mass ratio of iron filings to activated carbon is 1 ： 1）, micro-electrolysis time 80 min, Fenton oxidation time 120 min, H202 dosage 940 mg/L and cationic polyacrylamide dosage 120 mg/L, the wastewater COD is dropped from 3 116.0 mg/L to 681.3 mg/L with 78.1% of total COD removal rate and 33.1%, 37.9%, 7.1% of COD removal rate of the three processes respectively, and the effluent water quality meets the on-site injection standard of SY/T 5329-2012; The treatment effect of the combination process is much better than that of micro-electrolysis, Fenton oxidation or flocculation process, and the process is a simple method with high utilization rate of chemical reagents.

关 键 词：压裂废水 微电解 FENTON氧化 絮凝 COD去除率 

分 类 号：X703.1[环境科学与工程—环境工程]