摘要
人工湿地作为一种高效、低耗的污水处理新工艺已被广泛接受,特别是其在脱氮、除磷方面的应用逐步为人们所重视。在此深入地讨论了在复合垂直流人工湿地系统中,污水在不同深度的脱氮效率,结果表明,在系统中,硝态氮、亚硝态氮、沿水流方向逐渐减小;总氮去除率为61%,脱氮效果较好;另外,上行池因溶解氧低、有机碳不足和系统向水中释放氮的原因,脱氮效果不如下行池好。
Constructed wetlands as a high-efficiency and low consumption technology of sewage treatment has been widely accepted ,especially in nitrogen and phosphorus removal which is gradually attracting attentions. In the integrated vertical flow constructed wetland system,nitrogen removal efficiency of the sewage in different depth was discussed. The results showed that nitrate and nitrite decreased gradually along the direction of flow in the system. Total nitrogen removal rate was 61% which is satisfactory. In addition, the nitrogen removal efficiency of up - flow system was worse than down - flow system because of low dissolved oxygen, absent of organic carbon and the release of nitrogen from water.
出处
《环境科技》
2010年第A02期13-15,共3页
Environmental Science and Technology
关键词
复合垂直流人工湿地
氨氮
总氮
水处理
Integrated vertical flow wetland
Ammonia nitrogen
Total nitrogen
Sewage treatment
