DOI: 10.1016/j.watres.2018.07.024
Scopus记录号: 2-s2.0-85050862462
论文题名: High-resolution mapping and modeling of anammox recovery from recurrent oxygen exposure
作者: Seuntjens D. ; Carvajal-Arroyo J.M. ; Ruopp M. ; Bunse P. ; De Mulder C.P. ; Lochmatter S. ; Agrawal S. ; Boon N. ; Lackner S. ; Vlaeminck S.E.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 144 起始页码: 522
结束页码: 531
语种: 英语
英文关键词: Energy-positive
; Inhibition
; Intermittent aeration
; Monod
; Partial nitritation/anammox
; Sewage treatment
Scopus关键词: Enzyme inhibition
; Nitrogen removal
; Oxygen
; Sewage aeration
; Sewage treatment
; Wastewater treatment
; Ammonium oxidizing bacteria
; Energy-positive
; High-resolution mapping
; Intermittent aeration
; Microbial communities
; Monod
; Oxygen concentrations
; Partial nitritation
; Recovery
; ammonia
; dissolved oxygen
; nitrate
; nitrite
; oxygen
; ammonium
; autotrophy
; bacterium
; bioreactor
; experimental study
; inhibition
; microbial community
; nitrification
; nitrogen
; oxic conditions
; oxygen
; reaction kinetics
; sewage treatment
; aeration
; anammox bacterium
; Article
; bacterial growth
; biomass
; Brocadia
; chemical reaction
; microbial community
; nitrosative stress
; nonhuman
; oxidative stress
; oxygen concentration
; partial nitritation
; priority journal
; reactor operation
英文摘要: Oxygen inhibits anammox, a bioconversion executed by anoxic ammonium oxidizing bacteria (AnAOB). Nonetheless, oxygen is mostly found in the proximity of AnAOB in nitrogen removal applications, being a substrate for nitritation. The experiments performed to date were mostly limited to batch activity tests where AnAOB activity is estimated during oxygen exposure. However, little attention has been paid to the recovery and reversibility of activity following aerobic conditions, of direct relevance for bioreactor operation. In this work, anoxic and autotrophic reactor cultivation at 20 °C yielded an enriched microbial community in AnAOB, consisting for 75% of a member of the genus Brocadia. High-resolution kinetic data were obtained with online ammonium measurements and further processed with a newly developed Python data pipeline. The experimentally obtained AnAOB response showed complete inhibition until micro-aerobic conditions were reached again (<0.02 mg O2 L−1). After oxygen inhibition, AnAOB recovered gradually, with recovery times of 5–37 h to reach a steady-state activity, dependent on the perceived inhibition. The recovery immediately after inhibition was lowest when exposed to higher oxygen concentrations (range: 0.5–8 mg O2 L−1) with long contact times (range: 9–24 h). The experimental data did not fit well with a conventional ‘instant recovery’ Monod-type inhibition model. Yet, the fit greatly improved by incorporating a dynamic growth rate formula accurately describing gradual activity recovery. With the upgraded model, long-term kinetic simulations for partial nitritation/anammox (PN/A) with intermittent aeration showed a decrease in growth rate compared to the instant recovery mode. These results indicate that recovery of AnAOB after oxygen exposure was previously overlooked. It is recommended to account for this effect in the intensification of partial nitritation/anammox. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112528
Appears in Collections: 气候减缓与适应
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作者单位: Center for Microbial Ecology and Technology (CMET), Ghent University, Gent, Belgium; Technische Universität Darmstadt, Institute IWAR, Chair of Wastewater Engineering, Darmstadt, Germany; Biomath, Ghent University, Gent, Belgium; Research Group of Sustainable Energy, Air and Water Technology, University of Antwerp, Antwerpen, Belgium
Recommended Citation:
Seuntjens D.,Carvajal-Arroyo J.M.,Ruopp M.,et al. High-resolution mapping and modeling of anammox recovery from recurrent oxygen exposure[J]. Water Research,2018-01-01,144