DOI: 10.1016/j.watres.2018.07.027
Scopus记录号: 2-s2.0-85053168939
论文题名: Bacterial growth through microfiltration membranes and NOM characteristics in an MF-RO integrated membrane system: Lab-scale and full-scale studies
作者: Park J.W. ; Lee Y.J. ; Meyer A.S. ; Douterelo I. ; Maeng S.K.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 144 起始页码: 36
结束页码: 45
语种: 英语
英文关键词: Biofouling
; Filterable bacteria
; Microfiltration
; NOM
; Reverse osmosis
Scopus关键词: Biofilms
; Biofouling
; Biopolymers
; Chemicals removal (water treatment)
; Microfiltration
; Osmosis membranes
; Reverse osmosis
; RNA
; Bacterial community structure
; Humic-like substances
; Hydraulic resistances
; Integrated membrane systems
; Micro-filtration membranes
; Natural organic matters
; Operational problems
; Water treatment systems
; Bacteria
; bacterium
; biofilm
; biofouling
; growth rate
; membrane
; organic matter
; reverse osmosis
; water treatment
; Bacteria (microorganisms)
; Comamonadaceae
; Flavobacteriaceae
; Sphingobacteriaceae
; Sphingomonadaceae
英文摘要: Biofilm formation on membrane surfaces causes many operational problems such as a decrease in permeate flux and an increase in hydraulic resistance. In this study, the ability of bacteria to pass through microfiltration (MF) membranes and the growth potential of microfilterable bacteria were investigated in order to understand biofouling in MF-reverse osmosis (RO) integrated membrane systems. Growth of microfilterable bacteria in MF permeate was observed, indicating that not all MF membranes can guarantee the total rejection of bacteria. Changes in natural organic matter (NOM) characteristics and growth potential of bacteria during the treatment process are important factors in the occurrence of biofilm development in water treatment systems. Analysis of protein-like and humic-like substances in NOM of two successive RO stages revealed an increase in the concentrations of both biopolymers and humic substances of RO concentrates. Unexpectedly, the use of antiscalants was seen to enhance the growth of bacteria in the RO feed water in this study. Bacterial 16s rRNA pyrosequencing revealed that passing source water through the MF membranes dramatically changed bacterial community structure. The bacterial communities that passed through the MF steps primarily belonged to the family Comamonadaceae. However, several bacteria groups including Flavobacteriaceae, Sphingobacteriaceae and Sphingomonadaceae selectively composed the biofilm community formed on the RO membranes. Thus, understanding the selectivity and filterability of MF towards microorganisms involved in biofouling on RO membrane surfaces is crucial for the improvement of membrane-related operational processes. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112521
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil and Environmental Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul, 05006, South Korea; K-water Convergence Institute, 125 Yuseong-daero 1689 beon-gil, Yuseong-gu, Deajeon, 34045, South Korea; Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Delft, Netherlands; Pennine Water Group, Department of Civil and Structural Engineering, The University of Sheffield, Sheffield, United Kingdom
Recommended Citation:
Park J.W.,Lee Y.J.,Meyer A.S.,et al. Bacterial growth through microfiltration membranes and NOM characteristics in an MF-RO integrated membrane system: Lab-scale and full-scale studies[J]. Water Research,2018-01-01,144