中文摘要：

脱氮作为潜流式人工湿地的一项重要功能,一直是近年来研究的热点。在分析人工潜流湿地脱氮机理的基础上,进一步探讨了国内外提高脱氮效率的主要方法,包括选择合适的植物与基质、提高溶解氧浓度与合理添加反硝化原料等。除传统的脱氮路径以外,短程硝化反硝化、厌氧氨氧化及全程自养脱氮作为新发现的脱氮路径是今后主要的研究热点,其运行参数的优化是提高脱氮效率的关键。最后结合国内外研究现状,对今后相关的研究方向进行了展望。

英文摘要：

In recent years, nitrogen removal, an important function of subsurface flow constructed wetlands, has all been a hot issue in research field. Based on the analysis of its mechanisms, the methods to increase denitrification efficiency are discussed, including choosing appropriate plants and medium, increasing the concentration of dissolved oxygen, adding optimal denitrification source and so on. Besides, the pathway of traditional nitrogen removal, the new pathways of nitrogen removal such as shortcut nitrification-denitrification, anaerobic ammonia oxidation and CANON are the research hotspots in future. The optimal operating parameters are the key factors to improve nitrogen removal efficiency. In addition, combined with the research situation at home and abroad, a prospect on future studies and relevant suggestions are given in the end.