DOI: 10.1016/j.watres.2018.06.003
Scopus记录号: 2-s2.0-85049347440
论文题名: Mechanism insights into bio-floc bound water transformation based on synchrotron X-ray computed microtomography and viscoelastic acoustic response analysis
作者: Wu B. ; Zhou M. ; Dai X. ; Chai X.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142 起始页码: 480
结束页码: 489
语种: 英语
英文关键词: Bound water
; Dewatering
; EPS
; Waste activated sludge
; X-ray CMT
Scopus关键词: Correlation methods
; Tomography
; Viscoelasticity
; Viscosity
; Water supply systems
; X rays
; Acoustic response analysis
; Bound water contents
; Bound waters
; Extracellular polymeric substances
; In-situ synchrotrons
; Organic compositions
; Pearson correlation coefficients
; Waste activated sludges
; Dewatering
; activated sludge
; dewatering
; exopolymer
; flocculation
; porewater
; spatial distribution
; tomography
; transformation
; viscoelasticity
; visual analysis
; water
; X-ray
; acoustic analysis
; activated sludge
; Article
; bound water transformation
; chemical composition
; chemical structure
; dewatering
; flocculation
; hydrophilicity
; micro-computed tomography
; particle size
; physical chemistry
; polymerization
; priority journal
; quartz crystal microbalance
; sludge conditioning
; synchrotron radiation
; viscoelasticity
; waste component removal
; waste water management
; water analysis
; water content
; water supply
; x-ray computed tomography
; zeta potential
英文摘要: This study visually tracked the micro-spatial water distribution in bio-flocs of waste activated sludge through in situ synchrotron X-ray computed microtomography. Primarily, the two fractions of bound water, the vicinal water adhering to the surface of organic compositions and the interstitial water mechanically trapped in the net-like structure of bio-flocs, were proposed based on the cross-section imaging results. Furthermore, the determinants on bound water occurrences were explored in terms of viscoelastic acoustic responses of extracellular polymeric substances (EPS). The joint roles of hydrophilic substance removal, EPS aggregation compaction and colloidal instability of sludge flocs in bound water reduction were confirmed by the strong correlations (Pearson correlation coefficient, Rp > 0.95, p-value<0.04) among protein levels of EPS, EPS viscosity and bound water contents. Accordingly, providing adhering sites for vicinal water and forming bio-flocs with high viscosity for trapping interstitial water were proposed to be the contributions of EPS on bound water occurrences. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112634
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China; Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois Street, Golden, CO 80401, United States; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
Recommended Citation:
Wu B.,Zhou M.,Dai X.,et al. Mechanism insights into bio-floc bound water transformation based on synchrotron X-ray computed microtomography and viscoelastic acoustic response analysis[J]. Water Research,2018-01-01,142