水平潜流人工湿地的脱氮机理及其影响因素研究

摘要

The nitrogen removal modes of horizontal subsurface flow constructed wetlands mainly include plant up-take,medium adsorption,nitrification-denitrification,etc. Among these modes,nitrification-denitrification is the most important mechanism of nitrogen removal. The structure of horizontal subsurface flow constructed wetland determines the entire inner anaerobic environment of it,so as to obtain better denitrification results. The main influencing factors of nitrogen removal in horizontal subsurface flow constructed wetlands include dissolved oxygen,substrate,plant,car-bon source,operational conditions,etc. The main factors that affect the nitrogen removal in constructed wetland are discussed,the measures of improving the wetland nitrogen removal efficiency are expounded,and the related research direction in future are pointed out.%水平潜流人工湿地中氮的去除方式主要包括植物吸收、基质吸附和硝化-反硝化作用等，其中硝化-反硝化作用是其最主要的脱氮机理。水平潜流人工湿地的构造决定了其内部整体厌氧的环境，使其具有较好的反硝化脱氮效果。影响水平潜流人工湿地脱氮的主要因素包括溶解氧、基质、植物、碳源及运行条件等。探讨了影响湿地脱氮的主要因素，同时论述了提高湿地脱氮效果的措施，并对今后的相关研究方向进行了展望。