An ecological combined constructed wetlands system was used to treat both simulated and real piggery wastewater.The system consisted of three stages.The first stage was a surface flow wetland (SSF); the second incorporated horizontal and vertical subsurface wetlands (HSSF and VSSF, respectively), and the third was a subsurface infiltration system.When the concentration of influent COD, TN, NH4+-N and TP of were 709.2 mg·L-1, 597.1 mg·L-1, 560.4 mg·L-1, 42.5 mg·L-1,the removal rate of COD, TN,NH4+-N and TP were achieved 87％, 95％, 97％ and 95 ％,respectively.The COD was mainly removed by the SSF stage, while NH4+ -N and TN were mainly removed by HSSF and VSSF.This study proved that HSSF and VSSF removed much of the dissolved phosphorus, while the subsurface infiltration system performed tertiary treatment, improving effluent quality.And the results also showed VSSF has better performance than HSSF on the pollutants removal.%研究了表面流、水平潜流和垂直潜流人工湿地以及地下渗滤系统组合生态工艺对模拟和实际猪场养殖废水的净化效果.结果表明,在进水P(COD)=709.2mg·L-1,P(TN)=597.1 mg·L-1,P(NH4+-N)=560.4mg·L-1和P(TP)=42.5mg·L-1的质量浓度条件下组合生态系统对于COD、TN、NH4+-N和TP的去除率分别可以达到87%、95%、97%和95%,其中COD的去除主要在第一级表面流人工湿地,NH4+-N和TN去除主要是在水平潜流和垂直潜流人工湿地,水平潜流和垂直潜流人工湿地对溶解性磷酸盐去除效果明显,地下渗滤起到进一步稳定出水水质的作用.水平潜流和垂直潜流人工湿地的运行结果对比表明,后者对污染物的去除率均高于前者.
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