间种式植物人工湿地对校园生活污水净化的效果研究

Research on Removal Efficiency of Interplanting Constructed Wetland Plants on Domestic Sewage from Campus

[目的]研究人工湿地景观设计效果及不同人工湿地植物对生活污水的处理效果.[方法]选择美人蕉＋菖蒲＋野菱＋轮叶黑藻构成人工湿地植物组合,测定该组合对试验水样NH3-N、CODCr、TP的去除率.[结果]组合植物对NH3-N的削弱作用最为显著,其次是CODCr、TP.水力停留时间3d对NH3-N、CODCr、TP的去除率分别为：50.25％～ 99.40％、37.10％～72.83％、-28.48％ ～91.81％;最高去除率分别为99.40％、72.83％、91.81％.第一周期到第四周期NH3-N、CODCr、TP的去除效率曲线表明：曲线的斜率呈现出增加趋势.[结论]该研究可为复合人工湿地植物群落对生活污水的去除效果提供重要的运行参数和技术支持.

[Objective] The research aimed to study the effects of landscape design and the treatment effects of different constructed wetland plants on domestic sewage.[Method] Taken constructed wetland plants combination of Canna indica ＋ Acorus calamus Linn ＋ Trapa incise ＋ Hydrilla verticillata as materials,and its removal efficiencies on NH3-N,CODCr and TP were determined.[Result] The results showed that constructed wetland plants combination had the best removal efficiency on NH3-N,followed with CODCr and TP.During 3 d hydraulic retention time,the removal efficiency on NH3-N,CODCr and TP was 50.25％-99.40％,37.10％-72.83％ and-28.48％-91.81％,with highest rates of 99.40％,72.83％ and 91.81％,respectively.The slope of removal efficiency curves of NH3-N,CODCr and TP from first cycle to fourth cycle demonstrated increasing trends.[Conclusion] This study could provide important operation parameters and technological supports for the removal effects of domestic sewage using plants community from combined constructed wetland.