中文摘要：

以垂直流人工湿地小试系统为研究对象，探讨了不同位置（表层、上层、中层和下层）添加固体碳源对系统氮、磷及CODcr，去除效果的影响．结果表明：湿地下层硝态氮去除率低于中层，最适宜碳源添加位置为垂直流人工湿地中、下层．添加碳源系统中，碳源添加位置为表层的系统CODcr去除率最高，各系统出水CODcr浓度均低于进水，不引起系统出水中CODcr浓度的增加．添加碳源显著提高脱氮除磷效果，碳源添加位置为下层的系统TN去除率最高，碳源添加位置为表层的系统氨氧化作用明显，出水钱态氮浓度最高，各系统对亚硝态氮和硝态氮去除率差异不明显，但对硝态氮都表现出良好的去除效果．碳源添加位置为下层的系统硝化作用最完全，TP去除能力也显著优于其他各系统．添加碳源至垂直流人工湿地下层可以达到同步脱氮除磷的效果．

英文摘要：

The optimum of carbon snurees adding location and the effects of adding to different locations（ surface, the upper, mid- die and lower layers）on the removal efficiency of nitrogen, phosphorus and CODcr were investigated in small-scale vertical flow constructed wetlands. The results showed that the removal efficiency of the nitrate nitrogen in the lower layer was lower than that in the middle layer, and the most suitable location for carbon sources supplement was the middle and lower layer of the vertical flow constructed wetlands. Among the systems with carbon sources added, the one which added the carbon sources to the surface layer exhibited the highest removal efficiency of CODer, and the concentration of CODcr of the effluent of each system were lower than the influent, not causing the eoneentration of CODcr increasing of the effluent of the systems. Adding carbon sources can signifi- cantly improve the removal efficiency of nitrogen and phosphorus. The system which added the carbon sources to the lower layer showed the highest removal efficiency of total nitrogen. The system which added the carbon sources to the surface layer showed sig- nificant ammoxidation, and the coneentration of ammonia nitrogen of the effluent was highest. The removal efficiency of each sys- tem showed no significant difference in the removal efficiency of nitrite and nitrate nitrogen, and all showed great removal efficiency of nitrate nitrogen. The system which added the carbon sources to the lower layer showed the most complete nitrification, and the removal efficiency of total phosphorus was also significantly better than that of other systems. Adding carbon sources to the lower layer of the vertical flow eonstrueted wetland can achieve the effect of simultaneous removal of nitrogen and phosphorus.