垂直流人工湿地的设计及净化功能初探

：阐述了垂直流人工湿地小试系统的设计方法，并对其净化效果进行了初步的测试。垂直流人工湿地由下行流和上行流方式的2池组成，分别栽种了芦苇，香蒲，水葱。茭白，慈菇和菖蒲6种湿地植物。试验结果表明垂直流人工湿地能较好地改善水质，对NH4-N、TN、TP、CODCr，的平均去除率都达到了55%以上。各系统时污染物的去除作用无明显差异，出水中NO3-N的浓度与进水相比降低不明显，而NH4-N的去除率却很高，表明系统中硝化作用较强。本试验说明垂直流人工湿地系统能较好地改善水质，是一种有效的污水处理技术，对水体水质改善和水生态系恢复具有重要意义。

Preliminary Research on the Design and Purification Performance of Vertical Flow Constructed Wetland

The design method of small-scale vertical flow constructed wetland was expounded and its purification effect was tested preliminarily in this paper.The system was comprised of two chambers.One chamber induced downward-flow,the other created upward-flow.Six kinds of wetplants,include phragmites communis,typha orientalis,scirpus tabernaemontani,zizania caduciflora,sagittaria sagittifolia and acorus calamus,were transplanted,respectively.The test results showed that the vertical flow constructed wetland could improve water quality and had an average purification efficiency more than of 55% for NH_4-N,TN,TP and COD_(Cr).All the treaments had no obvious difference for removing contaminants.Concentrations of nitrate(NO_3-N) in effluents were not decreased obviously than those in influent,but the removing efficiency for NH_4-N was very high.This indicated that nitrification in the constructed wetland was intensive.The research result proved that the vertical constructed wetland was an effective technology to purify water quality and rehabilitate aquatic ecosystems.