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题名: Bacterial community and nitrate removal by simultaneous heterotrophic and autotrophic denitrification in a bioelectrochemically-assisted constructed wetland
作者: Xu, Dan1, 2; Xiao, Enrong2; Xu, Peng2, 3; Lin, Lili1, 2; Zhou, Qiaohong2; Xu, Dong2; Wu, Zhenbin2
关键词: Constructed wetland ; Heterotrophic denitrification ; Autotrophic denitrification ; Bioelectrochemical ; Bacteria community
刊名: BIORESOURCE TECHNOLOGY
发表日期: 2017-12-01
DOI: 10.1016/j.biortech.2017.09.045
卷: 245, 页:993-999
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: To enhance nitrate removal in constructed wetlands (CWs), a bioelectrochemically-assisted CW (BECW) integrating a three-dimensional biofilm-electrode reactor (3D-BER) into the CW was evaluated for the effectiveness of combined autotrophic and heterotrophic denitrification in the presence of organic matter and applied current. The effects of COD/N ratios on nitrate removal were investigated, and the bacterial communities in the granular active carbon (GAC) and graphite felt (GF) in the reactor's cathode region were compared. The highest NO3--N and TN removal efficiencies of 91.3 +/- 7.2% and 68.8 +/- 7.9% were obtained at the COD/N ratio of 5. According to the results of high-throughput sequencing analysis, sample GAC was enriched with a high abundance of Pseudomonas (17.29%) capable of autotrophic and heterotrophic denitrification, whereas autotrophic bacteria Thiobacillus (43.94%) was predominant in sample GF. The synergy between heterotrophic and autotrophic denitrification bacteria is believed to cause the high and stable nitrogen removal performance.
关键词[WOS]: NITROGEN REMOVAL ; WASTE-WATER ; CARBON SOURCE ; C/N RATIO ; THIOBACILLUS-DENITRIFICANS ; BIOFILM-ELECTRODE ; REACTOR ; FLOW ; SYSTEM ; PERFORMANCE
语种: 英语
项目资助者: National Natural Science Foundation of China(51308530) ; National Key Research and Development Plan of China(2016YFC0500403-03) ; Chinese Academy of Sciences(KFZD-SW-30202)
WOS记录号: WOS:000412443500122
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/342005/35725
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.Wuhan Univ Technol, Coll Resources & Environm Engn, Wuhan 430070, Hubei, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
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