DOI: 10.1016/j.watres.2018.11.043
Scopus记录号: 2-s2.0-85056881056
论文题名: A unified thermodynamic mechanism underlying fouling behaviors of soluble microbial products (SMPs) in a membrane bioreactor
作者: Teng J. ; Zhang M. ; Leung K.-T. ; Chen J. ; Hong H. ; Lin H. ; Liao B.-Q.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 477
结束页码: 487
语种: 英语
英文关键词: Membrane bioreactor
; Membrane fouling
; Soluble microbial products
; Specific filtration resistance
; Thermodynamic analysis
Scopus关键词: Adhesives
; Bioconversion
; Bioreactors
; Free energy
; Membrane fouling
; Membranes
; Microfiltration
; Surface treatment
; Thermoanalysis
; Attractive interactions
; Energy balance principle
; Membrane bioreactor
; Soluble microbial products
; Specific filtration resistance
; Thermo dynamic analysis
; Thermodynamic mechanism
; Thermodynamic process
; Shape memory effect
; microbial products not classified elsewhere
; polysaccharide
; bioreactor
; filtration
; fouling
; membrane
; sludge
; thermodynamics
; Article
; contact angle
; controlled study
; cytolysis
; energy balance
; fouling control
; nonhuman
; priority journal
; thermodynamics
; zeta potential
英文摘要: Soluble microbial products (SMPs) are the predominate foulants determining fouling extent in membrane bioreactors (MBRs). However, exact mechanism underlying their typical fouling behaviors remains unrevealed. In this study, the typical fouling behaviors of SMPs during initial operational period of a MBR were characterized. It was found that, although being low content, SMPs rather than sludge particulates preferentially adhered to membrane surface to accumulate a gel layer, and moreover, specific filtration resistance (SFR) of SMPs was approximately 700 times larger than that of the sludge particulates at operational day 3. According to energy balance principle, a unified thermodynamic mechanism underlying these fouling behaviors of SMPs was proposed. Thermodynamic analyses demonstrated that, the attractive interaction energy strength in contact between SMPs and membrane was larger by around 3700 times than that between sludge particulates and membrane, well explaining the extremely high adhesive ability of SMPs over sludge particlulates. Meanwhile, filtration through a SMPs layer was modelled and simulated as a thermodynamic process. Simulation on an agar gel showed that, about 92.6% of SFR was originated from mixing free energy change during filtration. Such a result satisfactorily interpreted the extremely high SFR of SMPs layer over sludge cake layer. The revealed thermodynamic mechanism underlying SMPs fouling behaviors significantly deepened understanding of fouling, and facilitated to development of effective fouling control strategies. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122135
Appears in Collections: 气候变化事实与影响
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作者单位: College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China; Department of Chemical Engineering, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario, P7B 5E1, Canada
Recommended Citation:
Teng J.,Zhang M.,Leung K.-T.,et al. A unified thermodynamic mechanism underlying fouling behaviors of soluble microbial products (SMPs) in a membrane bioreactor[J]. Water Research,2019-01-01