Study on the Treatment of Oil-Produced Wastewater Using the Combined Processes Including Advanced Oxidation

Yun Chong Li; Rong Jun Su; Yu Su; Feng Ying Zhang; Bing Jie Ye; Peng Wei; Yan Qing Liu

doi:10.4028/www.scientific.net/AMM.641-642.390

Paper Titles

Plants of Constructed Wetland Wastewater Treatment Systems: A Comparison of the Oxygen Release from Roots of Typha and Phragmite
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Progress in the Development and Application of Oilfield Produced Water Treatment Processes
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Research on Foam-Separation Type of Surfactant Wastewater Treatment
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Study on Biological Purification Effect on Tail Water from Sewage Treatment Plant at Small-Scaled Town, South Jiangsu
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Study on the Treatment of Oil-Produced Wastewater Using the Combined Processes Including Advanced Oxidation
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Synthesis Technology of Amine Surfactant Modified Brewer's Grains for the Adsorption of Cr(VI)
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Urban Sewage Treatment Process and Selection Principles
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Discussion on MBR Treatment Process of Domestic Landfill Leachate Design Issues in Northeast Area
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Megacities Land Drainage and Land Runoff Features and Treatment
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 641-642Study on the Treatment of Oil-Produced Wastewater...

Study on the Treatment of Oil-Produced Wastewater Using the Combined Processes Including Advanced Oxidation

Abstract:

It is difficult to be degraded by biological process for some oil-produced wastewater containing high content of oil, salt, and COD. The combined process including advanced oxidation was adopted to handle it in this paper. The combined process including adsorption by furnace ash, coagulation by complex of ferro-aluminum salt, Fenton advanced oxidation, alkali out by NaOH and Fenton secondary oxidation was determined. Considering both the treatment effect and the cost, the optimizing process is as follows, the slurry of ferro-aluminum complex salt of 9% (m/m) was as a coagulant with a dosage of 0.8% (v/v); pH value of 3.2,Fe²⁺/H₂O₂ of 1/2.5(v:v) and 30 mmol/L dosage of FeSO₄⋅7H₂O was confirmed in advanced oxidation phase; NaOH was as precipitant with a dosage of 1%(m/m); Finally, after the secondary oxidation, the COD value greatly dropped from original 5 422 mg/L of raw oil-produced wastewater to 185.3 mg/L of effluent with a removal as high as 96.6%. It meets the national discharge standard on oil-produced wastewater. BOD₅ / COD also rose from 0.23 to 0.39 which indicated an improved biochemical property.