Study on treatment of oilfield wastewater by iron-carbon micro electrolysis process
铁炭微电解工艺处理采油废水的研究

With the increase of oilfield wastewater and the increasingly strict requirement of discharge standard,it is necessary to search for an economical and efficient treatment method to achieve standard discharge.Iron-carbon micro electrolysis technology used to treat Ji Dong Oilfield wastewater was studied.The factors that affect the COD removal efficiency including particle size of iron scale,pH,Fe/C mass ratio and retention time were analyzed.Orthogonal experiments were also carried out to determine the order of different factors and optimal conditions as follows: pH> Fe/C mass ratio > retention time;pH=5,Fe/C mass ratio=7∶ 1,retention time=50 min.Under optimum conditions,COD removal efficiency was 43.85% and the effluent water met the second class national wastewater discharge standard.