人工湿地污水处理系统对氮磷的净化效果研究

Purification efficiency of constructed wetland system on nitrogen and phosphorus

人工湿地是一种新型的污水处理工艺。以沈阳市浑南新区人工湿地示范工程为研究对象,分析了人工湿地污水处理系统对氮磷的净化效果,探讨了垂直流湿地系统以及自由表面流湿地系统对氮磷的净化机理。结果表明:垂直流湿地对总氮有一定的净化效果,但稳定性较差。氨氮和总磷的去除率在运行期间始终保持较高水平,平均去除率分别为97.75%和81.03%;表面流湿地对总氮的净化受温度影响,湿地植物对氮磷的净化受生长环境和季节的影响。

Constructed wetland is a new wastewater treatment process. The purification efficiency of constructed wetland on nitrogen and phosphorus was analyzed by the constructed wetland wastewater system in Hunnan new district of Shenyang. The purification mechanisms of the vertical flow wetland system and the free surface flow wetland system on nitrogen and phosphorus were discussed. The results show that the vertical flow wetland system can remove the total nitrogen to some extent, but instable. The removal rates of NH4^＋ --N and the total phosphorus are better, and they are 97.75 % and 81.03 %, respectively. The purification efficiency of the surface flow wetland system on the total nitrogen is influenced by temperature, and those of wetland plants on nitrogen and phosphorus are influenced by the environment and seasons.