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题名: Microbial nitrogen removal pathways in integrated vertical-flow constructed wetland systems
作者: Hu, Yun1, 2; He, Feng1; Ma, Lin1; Zhang, Yi1; Wu, Zhenbin1
关键词: Integrated vertical-flow constructed wetland ; Nitrogen removal pathway ; Isotope pairing technique ; Nitrogen transformation functional gene ; Anammox
刊名: BIORESOURCE TECHNOLOGY
发表日期: 2016-05-01
DOI: 10.1016/j.biortech.2016.01.106
卷: 207, 页:339-345
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine ; Technology
类目[WOS]: Agricultural Engineering ; Biotechnology & Applied Microbiology ; Energy & Fuels
研究领域[WOS]: Agriculture ; Biotechnology & Applied Microbiology ; Energy & Fuels
英文摘要: Microbial nitrogen (N) removal pathways in planted (Canna indica L.) and unplanted integrated vertical-flow constructed wetland systems (IVCWs) were investigated. Results of, molecular biological and isotope pairing experiments showed that nitrifying, anammox, and denitrifying bacteria were distributed in both down-flow and up-flow columns of the IVCWs. Further, the N transforming bacteria in the planted IVCWs were significantly higher than that in the unplanted ones (p < 0.05). Moreover, the potential nitrification, anammox, and denitrification rates were highest (18.90, 11.75, and 7.84 nmol N g (1) h (1), respectively) in the down-flow column of the planted IVCWs. Significant correlations between these potential rates and the absolute abundance of N transformation genes further confirmed the existence of simultaneous nitrification, anammox, and denitrification (SNAD) processes in the IVCWs. The anammox process was the major N removal pathway (55.6-60.0%) in the IVCWs. The results will further our understanding of the microbial N removal mechanisms in IVCWs. (C) 2016 Elsevier Ltd. All rights reserved.
关键词[WOS]: ANAEROBIC AMMONIUM OXIDATION ; HORIZONTAL SUBSURFACE-FLOW ; DOMESTIC WASTE-WATER ; REAL-TIME PCR ; DENITRIFYING BACTERIA ; NOSZ GENES ; ANAMMOX ; SOILS ; NIRK ; DENITRIFICATION
语种: 英语
项目资助者: National Science and Technology Support Program of the 12th Five-Year Plan, China(2012BAJ21B03-04) ; National Natural Science Foundation of China(51178452) ; Major Science and Technology Program for Water Pollution Control and Treatment of China of the 12th Five-Year Plan(2012ZX07101007-005) ; Hubei Province Science Foundation for Youths(2014CFB282)
WOS记录号: WOS:000371262600044
ISSN号: 0960-8524
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27740
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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