Photocatalytic Oxidation Degradation Behavior on Fracturing Wastewater in Oilfield

Abstract:

Due to great variety additives and disposal difficulty, chemical method, biochemical method and solidification are adopted to treat fracturing wastewater in oil field. These processes easily bring about shortcomings, including high cost and secondary pollution. Studied on the treatment of fracturing wastewater of 4# well in Sichuan Oilfield by modified bentonite loading TiO2-Ag2O composite catalyst, COD removal rate is determined for different condition of pH value of solution, adding content of TiO2, inflating volume and light application time. The optimal condition is obtained as follows: pH value of solution is 3, adding content of TiO2 is 0.4-0.5%, inflating volume is 15L/min and light application time is 3h. Under this condition, COD removal rate of fracturing wastewater is 58.1%. The composite catalyst performance is stable and without secondary pollution. It is reusable by high temperature activation, so it can reduce wastewater treatment cost, and should be widely applied.

• Periodical: Advanced Materials Research (Volumes 396-398)
• Pages: 1918-1922
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.396-398.1918
• Online since: November 2011
• Authors: Li Ping Wan, Ying Feng Meng, Gao Li, Hua Zhou
• Keywords: Chemical Oxygen Demand (COD), Fracturing Wastewater, Photocatalytic Oxidation, TiO₂, Wastewater Treatment

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