期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 205, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2020.111330
关键词
Constructed wetland; Nitrogen removal; Dissolved oxygen; Oxygen-increasing technology
资金
- National Natural Science Foundation of China [51908326, 51720105013]
- China Postdoctoral Science Foundation [2018M640632]
- Shandong Provincial Natural Science Foundation [ZR2019MEE026]
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.
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