K2FeO4-PAC-PAM同时去除污水中氨氮、总磷和CODCr的研究

Simultaneous removal of ammonia nitrogen,total phosphorus and COD from wastewater by K2FeO4-PAC-PAM

以CODCr、总磷和氨氮的去除率作为考察指标,通过投加高铁酸钾(K2FeO4)、PAC和PAM,对模拟《城镇污水处理厂污染物排放标准》(GB18918—2002)一级A标准的污水进行去除试验研究,考察了污染物的去除效果,并对其去除机理进行了探讨。结果表明,氨氮、总磷和CODCr的去除率分别可达到76.18%,82.34%和55.65%。三项污染物浓度达到《地表水环境质量标准》(GB3838—2002)V类标准,比使用PAC和PAM处理时去除效果显著提高;K2FeO4-PAC-PAM复合体系中,高铁酸钾具有显著的絮凝协同作用;同时发现,PAC和高铁酸钾浓度比以及高铁酸钾与PAC和PAM的投加顺序均会对污染物的去除率产生不同影响。

Taking CODCr,total phosphorus and ammonia nitrogen removing rates as study index,by adding potassium ferrate(K2FeO4),PAC and PAM,the sewage of the first-class A standard of the “Sewage Discharge Standard of Urban Sewage Treatment Plant”(GB 18918-2002) was simulated.The experimental study was carried out to investigate the removal effect of pollutants,and the removal mechanism was discussed.The results showed that the removal rates of ammonia nitrogen,total phosphorus and COD Cr could reach 76.18%,82.34% and 55.65%,respectively.The concentration of the three pollutants reached the Class V standard of “Surface Water Environmental Quality Standard”(GB 3838-2002),which was significantly improved when treated with PAC and PAM.In the K2FeO4-PAC-PAM composite system,potassium ferrate was significant.The synergistic effect of flocculation;at the same time,it was found that the ratio of PAC to potassium ferrate and the order of addition of potassium ferrate and PAC and PAM had different effects on the removal rate of pollutants.