光助芬顿技术处理油母页岩干馏污水效果分析

Analysis on technology effect of oil shale retort sewage disposal by UV/Fenton

以抚顺某油母页岩炼油厂为例,重点介绍此油母页岩干馏污水厂干馏废水处理工艺流程并分析其出水水质变化情况,检测了隔油—厌氧—好氧对COD、石油类物质和氨氮的处理效果。经上述工艺处理后,COD、石油类、和氨氮的去除率分别达到了80%、96%、和86%。但是出水中COD和氨氮质量浓度指标仍然比较高,最终出水分别为913mg/L和126mg/L,不能达到辽宁省污水排放标准。通过用UV/Fenton高级氧化法对其出水进一步深化处理,研究了芬顿试剂的组成、进水初始pH值、光照时间等对反应效果的影响。最优条件下,COD、氨氮和石油类的最终出水质量浓度分别为160mg/L、9 mg/L和6mg/L。

To solve the problem of water resources shortage faced by the oil sewage, and to reduce the environmental pollution caused by the discharged sewage. A research of advanced sewage treatment process was carried out. The Oil Shale retort sewage from one of Fushun Shale Oil Company. Mainly introduce the source of Shale Oil sewage and technology characteristic in processing Oil Shale Retort Sewage. Analyzed sewage ingredient in processing technology and evaluated technology effecting of oil separating, oil disposal, EGSB, anaerobic digestion and contact oxidization. The results shows that the effluent concentration of COD, Oil, NH3 - N were 913 mg/L, 20 mg/L and 126 mg/L, and the removal rates were 80% , 96% and 86% . However, the effluent sewage can not achieve the sewage effluent standard of Liaoning province. This paper proposed to take UV/Fenton reagent as future processing method. The influential factors, the fenton reagent constitute and the initial pH and UV illumination time are an- alyzed. We get the optimal reaction factor, that the initial concentration of H202 is 2.2 g/L; the initial concentration of FeSO4·7H2O is 2.0 g/L; the initial pH is 3; UV illumination time is 90 minutes. The result shows that after the UV/Fenton reaction, the final concentration of COD, NH3 - N and Oil were 160 mg/L, 9 mg/L and 6 mg/L. At last, they catch the sewage effluent standard.