Fenton氧化法处理石化含油废水生化出水

采用Fenton氧化法处理石化含油废水生化出水,通过正交实验和单因素实验优化了反应工艺条件。正交实验得到各因素对COD去除率的影响大小顺序为:溶液初始pHH_2O_2投加量n(H_2O_2)∶n(Fe~(2+))反应温度。实验最佳工艺条件为:初始溶液pH 4.0,H_2O_2投加量3.00 mL/L,n(H_2O_2)∶n(Fe~(2+))=10,反应温度35℃,反应时间60 min。在此最佳工艺条件下COD可降至60.33 mg/L,COD去除率达61.33%。在最佳工艺条件下,分别采用超声(US)-Fenton氧化和紫外光(UV)-Fenton氧化技术处理含油废水生化出水,COD去除率分别达76.77%和80.23%。但单一Fenton氧化、US-Fenton氧化和UV-Fenton氧化工艺对NH_3-N的去除效果均并不明显。

Treatment of petrochemical wastewater effluent after biochemical treatment by Fenton oxidation process

The petrochemical wastewater effluent after biochemical treatment was treated by Fenton oxidation process. The process conditions were optimized by orthogonal experiments and single factor experiments. The order of effects on COD removal rate was as follows：initial solution pH > H₂O₂ addition amount > n（H₂O₂）∶n（Fe²⁺）> reaction temperature. The optimum process conditions were as follows：initial solution pH 4.0，H2O2 addition amount 3.00 mL/L，n（H₂O₂）∶n（Fe²⁺）=10，reaction temperature 35 ℃，reaction time 60 min. Under these conditions COD was decreased to 60.33 mg/L with 61.33% of the removal rate. When the effluent was treated by ultrasound（US）-Fenton oxidation process and UV-Fenton oxidation process under these optimum conditions，the COD removal rate was 76.77% and 80.23% respectively. But all processes of single Fenton oxidation，US-Fenton oxidation?and UV-Fenton oxidation had little effect on NH₃-N removal.