Fenton氧化/混凝协同处理焦化废水生物出水的研究

对Fenton氧化/混凝协同处理焦化废水生物出水的方法进行了研究,在综合考虑经济性和去除效果的前提下,提出了反应的最佳条件:H₂O₂投加量为220 mg/L,Fe²⁺投加量为180 mg/L,聚丙烯酰胺投加量为4.5 mg/L,反应时间为0.5h,pH=7.最终COD去除率可达44.5%,色度可以降为35倍,出水符合国家污水排放二级标准.同时,通过分析分子量分布和小分子有机物组成,揭示了Fenton氧化/混凝协同处理焦化废水生物出水的污染物变化规律.结果表明焦化废水经过Fenton氧化/混凝协同处理后,其出水可达到国家二级排放标准,并且处理成本相对较低,具有实际应用的前景.

Study on Fenton Oxidation Cooperated with Coagulation of Biologically Treated Coking Wastewater

The method of Fenton oxidation cooperated with coagulation for biologically treated coking wastewater was conducted.Based on both of the removal performance and the operating costs,optimal reaction condition was proposed.Operating at H₂O₂ concentration 220(mg/L),Fe²⁺ concentration 180(mg/L),PAM concentration 4.5(mg/L),reaction time 0.5h and pH=7,about 44.5% of COD was removed and chroma reached 35.In addition,through analyzing of the changes of molecular weight distribution and constitute of organic compounds in effluent,the pollutant transformation rule was put forward.The result shows that the effluent treated by Fenton oxidation cooperated with coagulation can reach the wastewater secondary discharge standard,and the operation costs are acceptable.This implies that the technique of Fenton oxidation cooperated with coagulation has promising in practice.