DOI: 10.1016/j.watres.2018.06.052
Scopus记录号: 2-s2.0-85053132247
论文题名: A metabolomic view of how low nitrogen strength favors anammox biomass yield and nitrogen removal capability
作者: Guo Y. ; Zhao Y. ; Zhu T. ; Li J. ; Feng Y. ; Zhao H. ; Liu S.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 143 起始页码: 387
结束页码: 398
语种: 英语
英文关键词: 16S rRNA transcript
; Anammox
; Biomass yield
; Metabolomics
; Nitrogen removal
Scopus关键词: Amino acids
; Biomass
; Bioreactors
; Biosynthesis
; Metabolism
; Nucleic acids
; Physiology
; RNA
; Wastewater treatment
; 16S rRNA
; Anaerobic ammonium oxidation
; ANAMMOX
; Biomass yield
; Hydraulic retention time
; Membrane bio reactor (MBR)
; Metabolomics
; Microbial metabolism
; Nitrogen removal
; ammonium compound
; bacterium
; biomass
; bioreactor
; metabolism
; nitrogen
; pollutant removal
; protein
; RNA
; wastewater treatment
; yield response
; Bacteria (microorganisms)
英文摘要: The low yield of anaerobic ammonium oxidation (anammox) biomass has attracted great attention because of its difficulty to be abundantly enriched. Patterns of substrate supply greatly influence microbial metabolism and behavior. The present study proposed that low nitrogen strength was beneficial to anammox biomass yield and nitrogen removal when comparing a membrane bioreactor (MBR) operated at low nitrogen strength with short hydraulic retention time (HRT) (R-low; influent: fixed at 100 mg-N L−1) and one operated at high nitrogen strength with long HRT (R-stepwise; influent: 100-700 mg-N L−1). Different nitrite concentrations in the two MBRs would indicate discrepant environments, and inevitably resulted in the discrepant microbial responses for anammox community. In particular, we found that at low nitrogen strength, increased activities of purine and pyrimidine metabolism pathways provided more abundant nucleic acids for bacterial proliferation. More active reaction of lipid and protein synthesis favored the synthesis of cellular structure. Importantly, the metabolism of cheaper amino acids was more active under low nitrogen strength, which was coupled with higher metabolic flux and potentially more active exchange of costly amino acids as public goods. In this way, more energy could be saved and applied to biomass yield. Higher active bacterial diversity and more positive interactions among bacterial species in R-low further favored biomass yield and nitrogen removal. The present study highlighted the significant effect of substrate supply patterns on anammox, which is meaningful to overcome the current bottleneck of deficient anammox biomass for application in wastewater treatment. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112596
Appears in Collections: 气候减缓与适应
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作者单位: Department of Environmental Engineering, Peking University, Beijing, 100871, China; State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology, Shenzhen Key Laboratory of Emerging Contaminants Detection & Control in Water Environment, Shenzhen Academy of Environmental Sciences, Shenzhen, 518001, China; School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, China; State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai 810016, China
Recommended Citation:
Guo Y.,Zhao Y.,Zhu T.,et al. A metabolomic view of how low nitrogen strength favors anammox biomass yield and nitrogen removal capability[J]. Water Research,2018-01-01,143