花叶芦竹水平潜流人工湿地脱氮性能研究

Study on nitrogen removal performance in horizontal subsurface constructed wetland with Arundo donax var. versicolor

采用花叶芦竹水平潜流人工湿地处理生活污水,对其脱氮性能进行研究。结果表明:在HRT=5 d,对TOC,NH4+-N,NO2--N,NO3--N和TN的去除效果分别达到92%、93%、84%、51%和88%,相应空白湿地的去除率分别为91%、85%、-232%、-203%和66%。大部分TOC在湿地的前端被去除。花叶芦竹可以直接吸收氮素,向湿地输送氧气,通过根系分泌物提供碳源。因此,花叶芦竹人工湿地具有很好的硝化反硝化能力,实现了良好的脱氮性能。

The study of the performance of nitrogen removal in horizontal subsurface constructed wetland with Arundo donax var.versicolor which treated domestic sewage was conducted.The experimental results indicated that,in HRT=5 d,the removal rates of TOC,NH^4＋-N,NO2^--N,NO3^--N and TN were 92%、93%、84%、51% and 88%,respectively.The corresponding removal rates of other subsurface constructed wetland without plants were 91%、85%、-232%、-203% and 66%,respectively.TOC was mainly removed in the front of wetland.The Arundo donax var. versicolor absorb nitrogen directly and transported oxygen into the wetland. The root secretions supplied carbon source. The study indicated that the horizontal subsurface constructed wetland with Arundo donax var. versicolor had sound ability of nitrification/denitrification and good performance of nitrogen removal.