臭氧催化氧化处理炼油生化尾水的研究

摘要

In order to solve the problem that the CODCr of biochemical refining wastewater can not reach the standard,ozone catalytic oxidation process was applied for the treatment of refinery biochemical tail water over ceramsite catalyst loaded with Mn-Fe oxide catalysts.The influence of pH,temperature,catalyst dosage and ozone amount on the treat effect of CODcr were investigated.The results showed that the high-est removal of CODCr was achieved when the flow rate of ozone was 6.3 mg/min,the dose of catalyst was 8 g/L,and the initial pH value was 7.Under these conditions,the concentration of CODCr is 48 mg/L which could satisfy the emission standard of pollutants for petroleum refining industry after 30 min treat-ment at the ambient temperature(22 ℃).The experimental result also showed that the self-prepared ceramsite catalyst had good stability.The activity did not decrease much even after ten runs.%针对生化后炼油废水CODCr无法达标的问题,使用负载Mn-Fe氧化物活性相的陶粒催化剂.采用臭氧催化氧化工艺处理炼油生化尾水.研究中考察了pH、温度、催化剂投加量和臭氧用量等工艺条件对生化尾水中CODCr处理效果的影响.结果表明,当废水初始pH=7,臭氧用量为6.3 mg/min,催化剂投加量为8 g/L时,催化氧化效果最优.室温(22 ℃)下反应30 min后,出水CODCr浓度为48 mg/L,满足了炼油企业排放标准.所制备的催化剂使用后活性稳定,多次使用后活性无明显降低.