| DOI: | 10.1016/j.watres.2017.12.064
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| Scopus记录号: | 2-s2.0-85040020363
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| 论文题名: | Methane-supported nitrate removal from groundwater in a membrane biofilm reactor |
| 作者: | Luo J.-H.; Chen H.; Yuan Z.; Guo J.
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| 刊名: | Water Research
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| ISSN: | 431354
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| 出版年: | 2018
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| 卷: | 132 | | 起始页码: | 71
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| 结束页码: | 78
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| 语种: | 英语
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| 英文关键词: | Anaerobic methane oxidation
; Denitrifying anaerobic methane oxidation (DAMO)
; Membrane biofilm reactor
; Micro-aerobic methane oxidation
; Nitrate removal
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| Scopus关键词: | Biofilms
; Biology
; Bioreactors
; Denitrification
; Dissolved oxygen
; Groundwater
; Groundwater pollution
; Methane
; Nitrates
; Oxidation
; Reaction intermediates
; RNA
; Volatile fatty acids
; Water treatment
; Anaerobic methane oxidations
; Anaerobic oxidation of methanes
; Heterotrophic denitrifiers
; Membrane biofilm reactor
; Methane oxidation
; Nitrate removal
; Potential technologies
; Volatile fatty acids (VFAs)
; Nitrogen removal
; acetic acid
; ammonia
; dissolved oxygen
; ground water
; methane
; nitrate
; nitrite
; oxygen
; propionic acid
; RNA 16S
; volatile fatty acid
; ground water
; methane
; nitric acid derivative
; anoxic conditions
; bacterium
; biofilm
; bioreactor
; denitrification
; groundwater
; membrane
; methane
; nitrate
; oxidation
; pollutant removal
; amplicon
; anaerobic metabolism
; Article
; fluorescence in situ hybridization
; gene sequence
; in situ hybridization
; limit of detection
; microbial community
; priority journal
; waste component removal
; anaerobic growth
; biofilm
; bioreactor
; denitrification
; metabolism
; Methylococcaceae
; microbiology
; oxidation reduction reaction
; waste water
; water pollutant
; Archaea
; Bacteria (microorganisms)
; Anaerobiosis
; Biofilms
; Bioreactors
; Denitrification
; Groundwater
; Methane
; Methylococcaceae
; Nitrates
; Oxidation-Reduction
; Waste Water
; Water Pollutants, Chemical
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| 英文摘要: | The discovery of denitrifying anaerobic methane oxidation (DAMO) has not only improved our understanding of global methane and nitrogen cycles, but also provided new technology options for removal of nitrate from nitrate-contaminated water. Previous studies have demonstrated DAMO organisms could remove nitrate and nitrite from wastewater under strictly anaerobically conditions. In the study, we investigate the feasibility of nitrate removal from groundwater, which contains dissolved oxygen in addition to nitrate. A membrane biofilm reactor (MBfR), inoculated with DAMO co-culture, was capable of treating synthetic groundwater containing highly contaminated nitrate (50 mg N/L) and oxygen (7–9 mg O2/L), with a maximum volumetric nitrate removal rate of 45 mg N/L-d. Accumulations of acetate and propionate were observed in some transient periods, indicating the possible involvement of acetate and propionate as intermediates in methane oxidation. The 16 S rRNA gene amplicon sequencing revealed that Candidatus Methylomirabilis, a known bacterial DAMO organism able to couple nitrite reduction with anaerobic oxidation of methane (AOM), was the dominant population. No archaeal DAMO organisms that are capable of coupling nitrate to AOM were observed, however, considerable amount of denitrifiers were developed in this system. Based on known metabolisms of these microorganisms and a series of batch studies, it was assumed that methane was oxidized into volatile fatty acids (VFAs) under oxygen-limiting conditions, then the generated VFAs served as carbon sources for these heterotrophic denitrifiers to remove nitrate. This study offers a potential technology for nitrate removal from groundwater by DAMO process in MBfR. © 2017 Elsevier Ltd |
| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/112985
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Advanced Water Management Centre, The University of Queensland, St Lucia, Queensland 4072, Australia
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| Recommended Citation: | |
Luo J.-H.,Chen H.,Yuan Z.,et al. Methane-supported nitrate removal from groundwater in a membrane biofilm reactor[J]. Water Research,2018-01-01,132
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