DOI: 10.1016/j.watres.2018.11.087
Scopus记录号: 2-s2.0-85059458296
论文题名: Denitrification as an N2O sink
作者: Conthe M. ; Lycus P. ; Arntzen M.Ø. ; Ramos da Silva A. ; Frostegård Å. ; Bakken L.R. ; Kleerebezem R. ; van Loosdrecht M.C.M.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 381
结束页码: 387
语种: 英语
英文关键词: Activated sludge
; Denitrification
; Nitrous oxide
; Wastewater treatment
Scopus关键词: Activated sludge process
; Denitrification
; Greenhouse gases
; Nitrogen oxides
; Nitrogen removal
; Polymerase chain reaction
; Reaction intermediates
; Reclamation
; Abiotic reactions
; Activated sludge
; Ammonium oxidation
; Carbon substrates
; Denitrifying organisms
; Microbial communities
; Nitrous oxide
; Wastewater treatment system
; Wastewater treatment
; ammonia
; nitrous oxide
; nitrous oxide reductase
; activated sludge
; ammonium compound
; bioremediation
; biotechnology
; denitrification
; emission control
; enzyme activity
; experimental study
; microbial activity
; nitrifying bacterium
; nitrous oxide
; oxidation
; polymerase chain reaction
; scavenging (chemistry)
; wastewater treatment plant
; activated sludge
; Article
; denitrification
; denitrifyer
; greenhouse gas
; microbial community
; nonhuman
; oxidation
; polymerase chain reaction
; priority journal
; reduction (chemistry)
; respiratory chain
; waste water management
; Norway
; Oslo [Norway]
英文摘要: The strong greenhouse gas nitrous oxide (N2O) can be emitted from wastewater treatment systems as a byproduct of ammonium oxidation and as the last intermediate in the stepwise reduction of nitrate to N2 by denitrifying organisms. A potential strategy to reduce N2O emissions would be to enhance the activity of N2O reductase (NOS) in the denitrifying microbial community. A survey of existing literature on denitrification in wastewater treatment systems showed that the N2O reducing capacity (VmaxN2O→N2) exceeded the capacity to produce N2O (VmaxNO3→N2O) by a factor of 2–10. This suggests that denitrification can be an effective sink for N2O, potentially scavenging a fraction of the N2O produced by ammonium oxidation or abiotic reactions. We conducted a series of incubation experiments with freshly sampled activated sludge from a wastewater treatment system in Oslo and found that the ratio α = VmaxN2O→N2/VmaxNO3→N2O fluctuated between 2 and 5 in samples taken at intervals over a period of 5 weeks. Adding a cocktail of carbon substrates resulted in increasing rates, but had no significant effect on α. Based on these results – complemented with qPCR and metaproteomic data – we discuss whether the overcapacity to reduce N2O can be ascribed to gene/protein abundance ratios (nosZ/nir), or whether in-cell competition between the reductases for electrons could be of greater importance. © 2018 The Author(s) Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122042
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Biotechnology, Delft University of Technology, Delft, Netherlands; Faculty of Chemistry, Biotechnology and Food Sciences, Norwegian University of Life Sciences, Ås, Norway; Bioclear Earth, Rozenburglaan 13, Groningen, DL 9727, Netherlands
Recommended Citation:
Conthe M.,Lycus P.,Arntzen M.Ø.,et al. Denitrification as an N2O sink[J]. Water Research,2019-01-01