以火山石、沸石、牡蛎壳、陶粒、麦饭石和砖红壤作为人工湿地填料,在水力负荷( 0.5～1.5 m/d)的条件下,构建垂直流人工湿地模拟系统,进行单一填料和组合填料的污水净化实验.结果表明,单一填料砖红壤、牡蛎壳、陶粒和麦饭石人工湿地系统对有机物去除能力较好,COD的去除率在40％以上.砖红壤、麦饭石和沸石对总氮的去除率达到39％以上,火山石29％,牡蛎壳和陶粒填料对总氮去除率均低于20％.除砖红壤具有较好去除磷的能力86％外,其余填料系统对磷的去除效率均在30％左右.与单一填料湿地系统相比,9种组合填料系统对主要污染物的去除效率均有所增加,其对COD、TN和TP的去除率分别为54％ ～ 82％、40％～91％、47％～84％,且均优于单一填料系统.由此可见,在垂直流人工湿地系统中,通过选择适宜的填料组合,完全可以在相对较高的水力负荷条件下取得较好的处理效果.%Several kinds of substrates were utilized in the vertical flow constructed wetlands simulation system to compare the purification capacity of single packing and combination packing by treating artificial sewage at hydraulic loading rate of 0. 5 ～1.5 m/d, including volcanic rock, zeolite, oyster shells, ceramsite, medical stone and laterite. The results showed that the COD removal efficiency was more than 40% in the single packing constructed wetlands of laterite, oyster shells, ceramsite and medical stone. The removal efficiency of total nitrogen (TN) was more than 39% in laterite, medical stone and zeolite-filled wetlands, that treated by volcanic rock was 29% , the treated by oyster shells or ceramsite was low than 20%. In addition to the high total phosphorus (TP) removal efficiency 86% in laterite -filled wetland, the total phosphorus (TP) removal efficiencies were about 30% obtained by the other five kinds substrates-filled wetland systems. Compared with the single packing wetland system, the major pollutants removal efficiencies increased in nine combination packing wetland systems, and its removal efficiencies for COD, TN and TP were 54% ～82% , 40% ～91% , and 47% ～ 84% , respectively, and the results were better than the single packing wetland system. The experiment indicated that good performance could be achieved at high hydraulic loading by choosing appropriate substrates and combinations.
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