两种人工湿地不同填料层净化污水效果研究

Wastewater Purification Efficiency in Different Filter Layers of Two Kinds of Artificial Wetlands

通过采集复合垂直流人工湿地(IVCW)和水平潜流人工湿地(HSCW)侧面不同高度的水样,初步研究了两种湿地填料的表层、中层、底层分别对污水中CODCr,TN,TP的净化效果.结果显示:①对CODCr的去除,两种人工湿地均未表现出显著差异.②两种湿地对TN的去除,主要取决于填料的中层和底层.③IVCW的填料表层除磷效果稳定,随环境因素变化,填料的中、底层TP去除率存在显著差异;HSCW中除磷主要在填料的底层,表层和中层填料容易出现明显的基质磷释放现象.

The research has surveyed the pollutant concentration of different water samples from the side of constructed wetland to investigate the effect of wastewater purification efficiency in different filter layers of IVCW（integrated vertical flow constructed wetland） and HSCW（horizontal subsurface flow constructed wetland）.The conclusion is that is no significant difference about the CODCr removal in the different substrate layers of the two kinds of constructed wetlands.The TN removal efficiency in the two kinds of constructed wetlands depend on the middle and bottom filler.In IVCW,the surface filler has stable TP removal;with changing in environmental factors,the TP removal in middle and bottom substrate layers have significant differences.In HSCW,the TP removal occurs mainly in the bottom of filler;there exists a phenomenon of phosphorus releasing obviously in middle and bottom substrate layers.