301. Electrochemical Oxidation Post-Treatment of High Concentration Waste Oil/Water Emulsion Treated with Ultrafiltration.
- Author
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Yang Liua, Lian jun Wang, Lihua Liu, Weiqing Han, Xiuyun Sun, Jiansheng Li, and Jinyou Shen
- Subjects
ULTRAFILTRATION ,DRAWING (Metalwork) ,INDUSTRIAL waste purification - Abstract
Integration of ultrafiltration (UF) with electrochemical oxidation process is investigated as treatment of stabilized high concentration waste oil/water emulsions, collected from metal drawing industry. Results show that at optimum conditions for different ultrafiltration membranes treated, the effluent still contains high CODCr and ammonia nitrogen (NH3-N) that is above the emission standard. Electrochemical oxidation process using Ti/SnO2+Sb2O3/α-PbO2 electrodes is tested as effluent posttreatment in reducing these high pollutant concentrations. Electrodes showed the perfect property. CODCr, NH3-N were affected during electrochemical oxidation process. Through a single-factor electrolysis experiment with optimal running conditions (current density of I=400A/m2, pH=6, CNaCl=10g/L, electrode spacing 5mm), after 15minutes the final CODCr and NH3-N concentrations were 18 and 2.4 mg/L and down to the discharge standards. A combined process consisting of UF and electrochemical oxidation can be a technical suitable solution for stabilized high concentration waste oil/water emulsions and yield a very high-quality aqueous effluent that could be reused for emulsion reformulation or others. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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