DOI: 10.1016/j.watres.2018.05.062
Scopus记录号: 2-s2.0-85048588479
论文题名: Oriented acidification of wasted activated sludge (WAS) focused on odd-carbon volatile fatty acid (VFA): Regulation strategy and microbial community dynamics
作者: Huang L. ; Chen Z. ; Xiong D. ; Wen Q. ; Ji Y.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142 起始页码: 256
结束页码: 266
语种: 英语
英文关键词: Microbial function group
; Oriented acidification
; Response surface methodology (RSM)
; VFA_odd
; Wasted activated sludge (WAS)
Scopus关键词: Acidification
; Anaerobic digestion
; Carbon
; Ecology
; Glycerol
; Microorganisms
; Propionic acid
; Saturated fatty acids
; Sludge digestion
; Surface properties
; Activated sludge
; Intermediate metabolites
; Microbial community dynamics
; Microbial community structures
; Microbial function
; Response surface methodology
; VFA_odd
; Volatile fatty acids (VFAs)
; Volatile fatty acids
; beta cyclodextrin
; glycerol
; polyhydroxyalkanoic acid
; propionic acid
; volatile fatty acid
; acidification
; activated sludge
; anaerobic digestion
; carbon
; community dynamics
; community structure
; fatty acid
; functional group
; microbial community
; optimization
; response surface methodology
; volatile substance
; acidification
; activated sludge
; anaerobic digestion
; Article
; community dynamics
; microbial community
; pH
; priority journal
; response surface method
; synthesis
; wasted activated sludge
英文摘要: As the main intermediate metabolite in anaerobic digestion of wasted activated sludge (WAS), volatile fatty acids (VFAs) are proper substrate for mixed culture (MC) polyhydroxyalkanoate (PHA) synthesis. To further optimize the performance of MC PHA production process, VFA_odd (i.e., VFA with odd carbon atoms) oriented acidification process was proposed and conducted in this study. Three regulation factors including reaction pH, fraction of added β-cyclodextrin (β-CD) and glycerol were selected and response surface methodology (RSM) was used to enhance and effectively regulate the VFA_odd production while maintaining enough acidification degree in the WAS acidification. High percentage of VFA_odd (larger than 60% and dominated by propionic acid) can be obtained in the operating condition area with glycerol addition ratio (quantified by C/N) ranging from 15 to 20 and reaction pH ranging from 8.0 to 9.5 when β-CD addition was held at zero level (0.2 g/gTSS) according to the RSM. Semi-continuous acidification and MC PHA production assays further verified the reliability and effectiveness of the VFA_odd oriented acidification strategy. Microbial function group related to propionic acid production (Gprop) was defined based on the relationships between system function and microbial community structure, and 13 frequent species were found being involved in the Gprop. Roles of the group members in the oriented acidification were analyzed to understand the mechanisms of the regulation of VFA_odd production at microbial ecological level. A synergistic effect of WAS and glycerol on the VFA_odd production in the acidification process was revealed based on the ecological analysis. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112630
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China; Shenzhen Shenshui Baoan Water Group CO.LTD, Shenzhen, 518133, China
Recommended Citation:
Huang L.,Chen Z.,Xiong D.,et al. Oriented acidification of wasted activated sludge (WAS) focused on odd-carbon volatile fatty acid (VFA): Regulation strategy and microbial community dynamics[J]. Water Research,2018-01-01,142