Enhanced oil recovery is the most effective method to produced oil from oil reservoir, during the enhanced oil recovery process, many kinds of chemicals, such as polymer and surfactants, are used, so the produced water (wastewater) is complexity and stability. How to treat the oily wastewater becomes an urgent problem in oil industry. So the feasibility and effective of electro-catalytic degradation of EOR wastewater was investigated in this paper. By sol-gel method the rare earth metal cerium (Ce) and titanium (Ti) doped TiO2 thin film electrodes were prepared. The surface topography, element composition and structure of the electrode of Ce-Ti/TiO2, which has the optimal effects for degradation of oily wastewater and polymer, were analyzed by SEM, EDX and XRD methods. The electro-catalytic effects and mechanism were also studied. The results indicated that the main process of electro-catalytic deoiling was electro-burning, and the acidic medium is favorable for oil and hydrolyzed polyacrylamide (HPAM) degradation. The removal rate of CODCr and oil content in the EOR wastewater reached 92.9% and 94.3% respectively. The removal efficiency of polymer was higher 20% than that of the advanced electrochemical oxidation technology, and the de-oiling efficiency enhanced about 8%~9%. After treatment by the electro-catalytic methods, the CODCr and oil content in the EOR wastewater meet with the Chinese discharge standard of the wastewater.

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