摘要
介绍了人工湿地的脱氮机制和影响因素,以及常用的反硝化外加碳源。人工湿地的脱氮机制主要包括基质吸附、植物吸收和微生物硝化反硝化等。但进入人工湿地的污水往往碳氮比较低,限制了脱氮效率,往往需要添加外源碳来提高人工湿地的脱氮效果;结合微藻可同化吸收利用氮磷,并在死亡分解过程中会释放有机物的规律。认为可构建藻类-人工湿地耦合系统,利用藻类作为人工湿地反硝化过程的外加碳源,以提高人工湿地脱氮效率。
The mechanism and influence factors of denitrification in constructed wetland （CW）, as well as common denitrification with additional carbon resources were introduced. Medium adsorption, plant uptake and microbial degradation are the main mechanisms of nitrogen removal in CW. However, the carbon nitrogen ratio of sewage discharged into CW was usually low which limited the nitrogen removal efficiency. External carbon source was added to improve the nitrogen removal efficiency in CW. In addition, algae could absorb nitrogen and phosphorus from water, and release organic matters in decomposition process. Integrated algal pond-CW system could be construct and algal could be used as the additional carbon sources in denitrification process to improve the nitrogen removal efficiency of CW.
出处
《水处理技术》
CAS
CSCD
北大核心
2018年第1期13-16,共4页
Technology of Water Treatment
基金
国家自然科学基金(51578395)
关键词
人工湿地
藻类
硝化反硝化
碳源
constructed wetland
algae
nitrification and denitrification
carbon source
