Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
Ecotoxicol Environ Saf. 2020 Dec 1;205:111330. doi: 10.1016/j.ecoenv.2020.111330. Epub 2020 Sep 22.
Constructed wetland has attracted more and more attention for wastewater purification due to its low construction cost and convenient operation recently. However, the unique waterflooding structure of constructed wetland makes the low dissolved oxygen level, which limits the effect of nitrogen removal in the system. Therefore, it is necessary to develop the oxygen-increasing technology to overcome the drawback in constructed wetlands. In this review, the mechanism of nitrogen removal in constructed wetland is discussed and oxygen is main influence factor is concluded. In addition, oxygen-increasing technologies in recent advances which improve the nitrogen removal efficiency greatly, are emphatically introduced. Finally, some future perspectives about oxygen-increasing techniques are also put forward in order to provide reference for further research and engineering application.
近年来，人工湿地因其建设成本低、操作方便而越来越受到人们的关注，用于废水净化。然而，人工湿地独特的注水结构导致溶解氧水平低，从而限制了系统的脱氮效果。因此，有必要开发增氧技术来克服人工湿地的这一缺陷。在本综述中，讨论了人工湿地的氮去除机制，并得出了氧是主要影响因素的结论。此外，还重点介绍了近年来大大提高氮去除效率的增氧技术。最后，还提出了一些关于增氧技术的未来展望，为进一步的研究和工程应用提供参考。
