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The conventional treatments are unable to effectively remove the Chemical Oxygen Demand (COD) of oily wastewater, which has seriously threatened the environment and the normal production of oil field. In this paper, an advanced method was proposed for oily wastewater treatment, Supercritical Water Oxidation (SCWO). The co-oxidative effect of ethanol on oily wastewater is characterized for the initial COD of oily wastewater (4000 mg/L) and ethanol concentration (20 mg/L) for a range of temperatures (390°C-450°C), a pressure of 23 Mpa for the complete combustion of both ethanol and oily wastewater. High concentrations of ethanol caused an increase in the conversion of oily wastewater at T = 450°C, p = 23 MPa and t = 9 min, the oily wastewater removal increases 8%.

Study on Supercritical Water Oxidation of Oily Wastewater with Ethanol