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臭氧光电催化耦合处理炼油反渗透浓水

Keywords: 炼油废水,反渗透浓水,臭氧氧化,光电催化

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Abstract:

为控制炼油废水对环境的污染,采用臭氧光电催化氧化耦合工艺对炼油废水反渗透浓水进行了处理研究,主要考察了pH、电流密度、臭氧投加量等因素对该耦合体系废水处理效果的影响。结果表明,臭氧光电催化氧化耦合技术可有效降解炼油废水反渗透浓水;废水中油类及COD的去除率随pH的增大先提高后降低;随电流密度的增大,COD去除率先提高后降低,油类物质先提高然后基本保持恒定;臭氧投加量不断增大,COD及油类物质去除率先提高后趋于稳定。当pH=7.5,臭氧投加量达到8mg/L,电流密度50mA/cm2,停留时间30min,出水达到COD≤50mg/L,石油类≤0.5mg/L的排放要求。

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