Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China.
Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China.
Bioresour Technol. 2020 Oct;314:123759. doi: 10.1016/j.biortech.2020.123759. Epub 2020 Jul 8.
Nitrogen removal through microorganisms is the most important pathway in constructed wetlands (CWs). In this review, we summarize the microbial coupling mechanisms of nitrogen removal, which are the common methods of nitrogen transformation. The electron pathways are shortened and consumption of oxygen and energy is reduced during the coupling of nitrogen transformation functional microorganisms. The highly efficient nitrogen removal mechanisms are cultivated from the design conditions in CWs, such as intermittent aeration and tidal flow. The coupling of microorganisms and substrates enhances nitrogen removal mainly by supplying electrons, and plants affect nitrogen transformation functional microorganisms by the release of oxygen and exudates from root systems as well as providing carriers for microbial attachment. In addition, inorganic elements such as Fe, S and H act as electron donors to drive the autotrophic denitrification process in CWs.
通过微生物进行氮去除是人工湿地（CWs）中最重要的途径。在本综述中，我们总结了氮去除的微生物耦合机制，这是氮转化的常见方法。在氮转化功能微生物的耦合过程中，电子途径缩短，氧气和能量的消耗减少。从 CWs 的设计条件（如间歇曝气和潮汐流）中培育出高效的氮去除机制。微生物和基质的耦合主要通过提供电子来增强氮去除，而植物通过根系释放氧气和分泌物以及为微生物附着提供载体来影响氮转化功能微生物。此外，Fe、S 和 H 等无机元素作为电子供体，驱动 CWs 中的自养反硝化过程。
