秋枫和乌桕对人工湿地脱氮除磷的影响

Effects of maple and tallow on nitrogen and phosphorus removal in constructed wetland

植物是湿地生态系统的重要组成组分,对人工湿地净化污水具有较大的影响.为探究木本植物对生活污水总氮(TN)、氨态氮(NH_(4)^(+)-N)、硝态氮(NO_(3)^(-)-N)和总磷(TP)去除的影响,选择秋枫(Bischofia javanica Bl.)和乌桕(Sapium sebiferum(L.)Roxb)2种木本植物来构建不同的纳米改性填料人工湿地系统.结果表明,乌桕(S)、秋枫(A)、填料+乌桕(FS)、填料+秋枫(FA)以及填料处理系统(F)对NH_(4)^(+)-N、NO_(3)^(-)-N、TN和TP均有一定的去除效果.其中FA系统对污水TN和TP的去除率较高,分别可达63.64%(6 d)、82.92%(6 d);FS系统对NH_(4)^(+)-N的去除效果较好,其去除率可达88.30%(6 d).

Plant is an important component of wetland ecosystem,which has a great influence on the purification of sewage by constructed wetland.Two woody plants,Bischofia javanica Bl.and Sapium sebiferum(L.)Roxb,were selected to construct different nano-modified filler constructed wetland systems.The effects of woody plants on the removal of total nitrogen(TN),ammonia nitrogen(NH_(4)^(+)-N),nitrate nitrogen(NO_(3)^(-)-N)and total phosphorus(TP)in domestic sewage were studied by simulating constructed wetlands,which provided a theoretical basis for the application of woody plants in constructed wetlands.The results showed that S.sebiferum(L.)Roxb(S),B.javanica Bl.(A),filler+S.sebiferum(L.)Roxb(FS),filler+B.javanica Bl.(FA)and filler treatment system(F)had certain removal effects on NH_(4)^(-)N,NO_(3)^(-)-N,TN and TP.The removal rates of TN and TP by FA system were 63.64%(6 d)and 82.92%(6 d),respectively.The removal rate of NH_(4)^(+)-N by filler+S.sebiferum(L.)Roxb(FS)system was 88.30%(6 d).