DOI: 10.1016/j.watres.2018.04.041
Scopus记录号: 2-s2.0-85046010146
论文题名: Changes in the physical properties of the dynamic layer and its correlation with permeate quality in a self-forming dynamic membrane bioreactor
作者: Guan D. ; Dai J. ; Watanabe Y. ; Chen G.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 140 起始页码: 67
结束页码: 76
语种: 英语
英文关键词: Dynamic layer compression
; Membrane bioreactor
; Permeate deterioration
; Self-forming dynamic membrane
Scopus关键词: Bioconversion
; Biological materials
; Biological water treatment
; Deterioration
; Membranes
; Pore size
; Turbidity
; Wastewater treatment
; Biological waste water treatment
; Conventional membrane bioreactors
; Layer compression
; Membrane bioreactor
; Self-forming dynamic membranes (SFDM)
; Solid liquid separation
; Supporting material
; Transmembrane pressures
; Bioreactors
; ammonia
; nylon
; polysaccharide
; protein
; activated sludge
; bioreactor
; experimental study
; filtration
; membrane
; physical property
; turbidity
; wastewater treatment
; activated sludge
; adsorption
; Article
; bacterial cell
; chemical oxygen demand
; compression
; confocal laser scanning microscopy
; desorption
; dissociation
; effluent
; particle size
; priority journal
; scanning electron microscopy
; surface area
; surface property
; suspended particulate matter
; turbidity
英文摘要: The self-forming dynamic membrane bioreactor (SFDMBR) is a biological wastewater treatment technology based on the conventional membrane bioreactor (MBR) with membrane material modification to a large pore size (30–100 μm). This modification requires a dynamic layer formed by activated sludge to provide effective filtration function for high-quality permeate production. The properties of the dynamic layer are therefore important for permeate quality in SFDMBRs. The interaction between the structure of the dynamic layer and the performance of SFDMBRs is little known but understandably complex. To elucidate the interaction, a lab-scale SFDMBR system coupled with a nylon woven mesh as the supporting material was operated. After development of a mature dynamic layer, excellent solid-liquid separation was achieved, as evidenced by a low permeate turbidity of less than 2 NTU. The permeate turbidity stayed below this level for nearly 80 days. In the fouling phase, the dynamic layer was compressed with an increase in the trans-membrane pressure and the quality of the permeate kept deteriorating until the turbidity exceeded 10 NTU. The investigation revealed that the majority of permeate particles were dissociated from the dynamic layer on the back surface of the supporting material, which is caused by the compression, breakdown, and dissociation of the dynamic layer. This phenomenon was observed directly in experiment instead of model prediction or conjecture for the first time. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112699
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil and Environmental Engineering, Water Technology Lab, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, Hong Kong; Research and Development Initiative, Chuo University, Kasuga, Bunkyou-ku, Tokyo, Japan
Recommended Citation:
Guan D.,Dai J.,Watanabe Y.,et al. Changes in the physical properties of the dynamic layer and its correlation with permeate quality in a self-forming dynamic membrane bioreactor[J]. Water Research,2018-01-01,140