电-Fenton法处理页岩气压裂返排液

页岩气开发压裂返排液处理是近年的研究热点，本文采用电-Fenton氧化技术对压裂返排液絮凝出水进行深度处理研究，主要考察了H2O2投加量、pH值、电压和反应时间对COD去除效果的影响。通过正交实验和单因素影响实验，确定电-Fenton氧化处理絮凝出水的适宜条件为：H2O2投加量为40 mL·L-1、pH=3、电压6 V和反应时间60 min。在此条件下，出水COD为71.3 mg·L-1，COD去除率达到62.5%。实验结果表明化学絮凝-电-Fenton氧化是页岩气压裂返排液达标外排的一种适宜处理工艺。

Treatment of shale gas fracturing flowback fluid by electro-Fenton process

The treatment of fracturing flowback fluid in shale gas development has been a hot topic of research in recent years. In this study, electro-Fenton technology was used for treating the flocculation effluent of shale gas fracturing flowback fluid. The main factors influencing the process, such as H2O2 dosage, pH, voltage, and reaction time, were investigated by orthogonal tests and single factor tests. The results show that the most suitable conditions were as follows:an H2O2 dosage of 40 mL·L-1, a pH of 3, a voltage of 6 V, and a reaction time of 60 min. Under these conditions, the effluent COD was 71.3 mg·L-1 and the removal rate of COD was 62.5%. The experimental results show that chemical flocculation and electro-Fenton technology are suitable processing technologies for treating shale gas fracturing flowback fluid.