DOI: 10.1016/j.watres.2018.11.040
Scopus记录号: 2-s2.0-85057448375
论文题名: Functional identification behind gravity-separated sludge in high concentration organic coking wastewater: Microbial aggregation, apoptosis-like decay and community
作者: Chen B. ; Yang Z. ; Pan J. ; Ren Y. ; Wu H. ; Wei C.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 120
结束页码: 128
语种: 英语
英文关键词: Aggregation
; Apoptosis-like decay
; Functional identification
; Gravity-separated sludge
; Microbial community
Scopus关键词: Agglomeration
; Cell death
; Microorganisms
; Nitrogen removal
; Separation
; Wastewater treatment
; Biological treatment process
; Dehydrogenase activity
; Extracellular polymeric substances
; Functional identification
; Functional predictions
; Microbial communities
; Specific oxygen uptake rate
; Wastewater treatment plants
; Decay (organic)
; nitrogen
; organic compound
; oxidoreductase
; oxygen
; polymer
; activated sludge
; aggregation
; apoptosis
; biotechnology
; concentration (composition)
; identification method
; microbial activity
; microbial community
; wastewater treatment
; wastewater treatment plant
; activated sludge
; apoptosis
; apoptosis like decay
; Article
; cellular distribution
; chemical interaction
; coking industry
; concentration (parameters)
; flocculation
; fractionation
; gravity
; microbial community
; nitrogen metabolism
; nonhuman
; organic waste
; oxygen consumption
; polymerization
; prediction
; priority journal
; sludge conditioning
; sludge settling
; sludge volume index
; waste water
; waste water management
; waste water treatment plant
英文摘要: Functional identification and elimination of activity-decayed sludge are helpful for improving the performance of biological treatment process. However, cell decay-associated changes in biological functions have not been explored for gravity-separated sludge. In this work, sludge flocs from the aerobic basin of a wastewater treatment plant treating high-concentration organic coking wastewater was fractionated according to settling velocity, i.e. sludge F (fast settling), sludge M (moderate settling) and sludge S (slow settling). Sludge volume index (SVI), mean floc size, dehydrogenase activity, specific oxygen uptake rate (SOUR), extracellular polymeric substances (EPS) content and aggregation interaction were investigated in the fractionated sludges. Apoptosis-like decayed cell distribution (ALDCD), a novel property of sludge, was proposed to describe sludge decay based on cell membrane variation. ALDCD of sludge F was 6.64% and 13.5% lower than sludge M and S, respectively. Microbial community and functional prediction revealed that sludge F exhibited the highest microbial potential for organic removal and sludge M had the highest potential for nitrogen metabolism while sludge S had the lowest potential for both. Our analysis suggests that the treatment efficiency might be enhanced by retaining compact sludge flocs while eliminating dispersive sludge flocs. This study also facilitates the identification and elimination of functional microbial groups from decayed sludge 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/122108
Appears in Collections: 气候变化事实与影响
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作者单位: School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, China; School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China
Recommended Citation:
Chen B.,Yang Z.,Pan J.,et al. Functional identification behind gravity-separated sludge in high concentration organic coking wastewater: Microbial aggregation, apoptosis-like decay and community[J]. Water Research,2019-01-01