Treating oil wastewater with pulse electro-coagulation flotation technology

Abstract： Pulse electro-coagulation flotation was used to treat oil wastewater of high oil content. Different operational conditions were examined, including current density, reactive time, electrode distance, pH and pole switching time. Orthogonal tests were carried out to identify the optimal operational conditions for this technique. Considering the treatment cost and efficiency together, the optimal operational conditions were an electrode distance of 3.3 cm, pH of 4, current density of 49.38 mA/cm2, reaction time of 15 min and pole switching time of 10 s. The removal efficiency of oil wastewater under normal conditions reached up to 96.21%. The influences of different factors on removal efficiency were in the following decreasing sequence: pH> current density > pole switching time > reactive time > board distance. 作 者： XIANG Ya-fang    XIE Zhao-ming    ZOU Yong   作者單位： College of Chemistry & Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China  期 刊： 重慶大學學報（英文版）    Journal： JOURNAL OF CHONGQING UNIVERSITY(ENGLISH EDITION)  年，卷(期)： 2010, 9(1)  分類號： X703.1  Keywords： oil wastewater    electro-coagulation flotation    oil removal efficiency   

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