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The combined effect of dissolved oxygen and COD/N on nitrogen removal and the corresponding mechanisms in intermittent aeration constructed wetlands
Wang, Jie1; Hou, Jie1,2; Xia, Ling3; Jia, Zhiming1; He, Xugang1,2; Li, Dapeng1,2; Zhou, Yiyong4
2020-01-15
Source PublicationBIOCHEMICAL ENGINEERING JOURNAL
ISSN1369-703X
Volume153Issue:1Pages:9
Abstract

In this study, the combined effect of dissolved oxygen (DO) and COD/N on nitrogen (N) removal as well as the corresponding mechanisms were investigated in aerated constructed wetlands (CWs). At each investigated COD/N level, the ammonium removal efficiency increased as DO concentration increased. However, the highest total N removal efficiency occurred at different DO concentration at each COD/N level. The results of functional gene analysis and cyclic N profile studies indicated that DO supply and COD/N influence the N removal performance, which is not only exert a direct effect on nitrification-denitrification process, but also change N removal pathway in intermittent aerated CWs. At a relatively high influent COD/N of 20, the simultaneous nitrification and denitrification (SND) via nitrite was almost the exclusive N removal pathway at all investigated DO concentration. With the decrease of COD/N from 20 to 2 at DO of similar to 1.8, similar to 3.5 and similar to 6.0 mg/L, SND efficiency all decreased, however, its decreasing rate was much higher at relatively high DO level of similar to 6.0 mg/L than that at DO levels of similar to 1.8 and similar to 3.5 mg/L. In comparison, a simultaneously partial nitrification, anammox and denitrification was established at DO of similar to 0.8 mg/L along with reducing influent COD/N.

KeywordConstructed wetlands Intermittent Aeration Nitrogen Removal Dissolved Oxygen COD/N
DOI10.1016/j.bej.2019.107400
Indexed BySCI
Language英语
WOS Research AreaBiotechnology & Applied Microbiology ; Engineering
WOS SubjectBiotechnology & Applied Microbiology ; Engineering, Chemical
WOS IDWOS:000518146100009
WOS KeywordWASTE-WATER TREATMENT ; COMMUNITY STRUCTURE ; ANAMMOX BACTERIA ; NITRIFICATION ; DENITRIFICATION ; ORGANICS ; EFFICIENCY ; SEDIMENTS ; AMMONIUM ; IMPACT
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/35100
Collection水环境工程研究中心_期刊论文
Corresponding AuthorHou, Jie
Affiliation1.Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China
2.Freshwater Aquaculture Collaborat Innovat Ctr Hub, Wuhan 430070, Peoples R China
3.Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Peoples R China
4.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan, Peoples R China
Recommended Citation
GB/T 7714
Wang, Jie,Hou, Jie,Xia, Ling,et al. The combined effect of dissolved oxygen and COD/N on nitrogen removal and the corresponding mechanisms in intermittent aeration constructed wetlands[J]. BIOCHEMICAL ENGINEERING JOURNAL,2020,153(1):9.
APA Wang, Jie.,Hou, Jie.,Xia, Ling.,Jia, Zhiming.,He, Xugang.,...&Zhou, Yiyong.(2020).The combined effect of dissolved oxygen and COD/N on nitrogen removal and the corresponding mechanisms in intermittent aeration constructed wetlands.BIOCHEMICAL ENGINEERING JOURNAL,153(1),9.
MLA Wang, Jie,et al."The combined effect of dissolved oxygen and COD/N on nitrogen removal and the corresponding mechanisms in intermittent aeration constructed wetlands".BIOCHEMICAL ENGINEERING JOURNAL 153.1(2020):9.
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