新型微电解填料-Fenton联用处理硝基苯废水

Treatment of nitrobenzene wastewater by new micro-electrolysis packing and Fenton reagent

研究通过单因素分析和正交实验法确定新型微电解填料-Fenton联用预处理硝基苯废水的最佳操作条件。结果表明,新型微电解填料降解硝基苯的影响因素从大到小依次为固液比>进水p H值>气水比>HRT,在微电解最佳条件:HRT为60 min,固液比为0.6,进水p H值为2,气水比为15∶1;Fenton试剂最佳条件:反应时间为20 min、p H值为4.5、m(H2O2):m(COD)为2.5、n(H2O2)∶n(Fe2+)为6,硝基苯和COD总去除率可分别达到97.6%和68.3%。处理后的废水可生化性提高,为后续的生物处理创造了良好的条件。

The process of combining novel micro-electrolysis packing and Fenton oxidation was used for treating nitrobenzene wastewater based on investigating the optimum parameters of micro-electrolysis and Fenton oxidization by orthogonal experiments and single factor analysis methods.The results showed that influencing factors affecting novel micro-electrolysis packing treatment processes in a descending order as:solid/liquid ration,initial p H,air/water ration and HRT.The total removal efficiency of nitrobenzene and COD could reach 97.6%and 68.3%,respectively under best conditions of micro-electrolysis:HRT of 60 min,solid/liquid ratio of 0.6,initial p H of 2,air/water ration of 15∶ 1;and optimum conditions of Fenton reagent:reaction time of 20 min,p H4.5,m(H2O2) ∶ m(COD) of 2.5 n(H2O2) ∶ n(Fe2 +) of 6.The biodegradability of treated wastewater was improved to create favorable conditions for subsequent biological treatment.