DOI: 10.1016/j.watres.2018.05.028
Scopus记录号: 2-s2.0-85047460332
论文题名: Deterministic mechanisms define the long-term anaerobic digestion microbiome and its functionality regardless of the initial microbial community
作者: Peces M. ; Astals S. ; Jensen P.D. ; Clarke W.P.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 141 起始页码: 366
结束页码: 376
语种: 英语
英文关键词: Activity assays
; Anaerobic digestion
; Core-community
; Correlation
; Kinetics
; Microbial community
Scopus关键词: Correlation methods
; Enzyme kinetics
; Metabolism
; Microorganisms
; Activity assays
; Core-community
; Deterministic mechanism
; Microbial communities
; Microbial community composition
; Microbial composition
; Operational conditions
; Positive correlations
; Anaerobic digestion
; acetic acid
; butyric acid
; casein
; formic acid
; genomic DNA
; methane
; microcrystalline cellulose
; propionic acid
; RNA 16S
; volatile fatty acid
; anaerobic digestion
; bioassay
; bioreactor
; community composition
; correlation
; inoculation
; metabolism
; microbial activity
; microbial community
; microbial ecology
; microorganism
; reaction kinetics
; relative abundance
; acetogenesis
; agricultural inoculation
; anaerobic digestion
; Article
; Bacteroidales
; Bacteroidetes
; chemical oxygen demand
; Chlorobi
; Fibrobacter
; Firmicutes
; hydrolysis
; metabolic activity assay
; metabolic rate
; Methanobacterium
; methanogenesis
; Methanomicrobiales
; Methanosaeta
; microbial community
; microbiome
; nonhuman
; pH
; population abundance
; priority journal
; Proteobacteria
; retention time
; Ruminococcaceae
; spirochete
; anaerobic growth
; bioreactor
; metabolism
; microbiology
; microflora
; Cores
; Digesters
; Impact
; Metabolism
; Microorganisms
; Performance
; Processes
; Startup
; Acetates
; Anaerobiosis
; Bioreactors
; Hydrolysis
; Methane
; Microbiota
英文摘要: The impact of the starting inoculum on long-term anaerobic digestion performance, process functionality and microbial community composition remains unclear. To understand the impact of starting inoculum, active microbial communities from four different full-scale anaerobic digesters were each used to inoculate four continuous lab-scale anaerobic digesters, which were operated identically for 295 days. Digesters were operated at 15 days solid retention time, an organic loading rate of 1 g COD Lr −1 d−1 (75:25 - cellulose:casein) and 37 °C. Results showed that long-term process performance, metabolic rates (hydrolytic, acetogenic, and methanogenic) and microbial community are independent of the inoculum source. Digesters process performance converged after 80 days, while metabolic rates and microbial communities converged after 120–145 days. The convergence of the different microbial communities towards a core-community proves that the deterministic factors (process operational conditions) were a stronger driver than the initial microbial community composition. Indeed, the core-community represented 72% of the relative abundance among the four digesters. Moreover, a number of positive correlations were observed between higher metabolic rates and the relative abundance of specific microbial groups. These correlations showed that both substrate consumers and suppliers trigger higher metabolic rates, expanding the knowledge of the nexus between microorganisms and functionality. Overall, these results support that deterministic factors control microbial communities in bioreactors independently of the inoculum source. Hence, it seems plausible that a desired microbial composition and functionality can be achieved by tuning process operational conditions. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112665
Appears in Collections: 气候减缓与适应
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作者单位: Centre for Solid Waste Bioprocessing, Schools of Civil and Chemical Engineering, The University of Queensland, St. Lucia CampusQLD 4072, Australia; Advanced Water Management Centre, The University of Queensland, St. Lucia CampusQLD 4072, Australia
Recommended Citation:
Peces M.,Astals S.,Jensen P.D.,et al. Deterministic mechanisms define the long-term anaerobic digestion microbiome and its functionality regardless of the initial microbial community[J]. Water Research,2018-01-01,141