影响潜流人工湿地脱氮主要因素及其解决途径

文章综述了潜流人工湿地除氮的各种机理,包括基质吸附、植物吸收、氨挥发、硝化-反硝化等,其中硝化-反硝化是最主要的脱氮过程。在人工湿地脱氮工艺方面,短程硝化反硝化和厌氧氨氧化是今后研究的前沿。此外讨论了影响人工湿地除氮效率的主要影响因素,包括温度、溶解氧、pH、碳源、重金属、水力学因素等,其中碳源、重金属和水力学方面的影响是研究的热点和前沿。最后,进一步综述了提高人工湿地脱氮效率的研究方法,并对今后的相关研究方向进行了展望。

The Main Effect factors of Nitrogen Removal in Subsurface Flow Constructed Wetlands and its Solutions

The main nitrogen removal mechanisms include medium adsorption,plant uptake,microbial assimilation,ammonia volatilization and nitrification-denitrification.Among them,nitrification-denitrification is the primary nitrogen removal process.As to the nitrogen removal technologies of subsurface flow constructed wetlands,shortcut nitrification-denitrification and anaerobic ammonia oxidation are the leading fields in future.In subsurface flow constructed wetlands,the main effect factors of nitrogen removal,such as temperature,DO,pH,carbon source,heavy metal,hydraulic design,were discussed.Among these factors,the factors caused by carbon source,heavy metal and hydraulic design are the hot spots at present.On the basis of the above discussion,the research methods of increasing nitrogen removal efficiency were discussed.In addition,a prospect on future studies and relevant suggestions are given in this paper.