DOI: 10.1016/j.watres.2018.11.006
Scopus记录号: 2-s2.0-85056862070
论文题名: Prevention of UF membrane fouling in drinking water treatment by addition of H 2 O 2 during membrane backwashing
作者: Yu W. ; Graham N. ; Liu T.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 394
结束页码: 405
语种: 英语
英文关键词: Biopolymers
; Coagulation
; H 2 O 2
; Membrane fouling
; Ultrafiltration
; Water treatment
Scopus关键词: Biogeochemistry
; Biopolymers
; Chemical bonds
; Chemical water treatment
; Coagulation
; Deterioration
; Hydrophobicity
; Membrane fouling
; Organic compounds
; Potable water
; Tanks (containers)
; Ultrafiltration
; Water treatment
; Growth of bacteria
; H2O2
; Irreversible fouling
; Organics adsorption
; Soluble microbial products
; Two-membrane systems
; Ultrafiltration membranes
; Water treatment process
; Membranes
; drinking water
; extracellular polymeric substance
; hydrogen peroxide
; organic matter
; polysaccharide
; protein
; unclassified drug
; adsorption
; coagulation
; concentration (composition)
; dose-response relationship
; drinking water
; fouling
; hydrophobicity
; laboratory method
; membrane
; organic matter
; polymer
; protein
; ultrafiltration
; water treatment
; adsorption
; Article
; bacterial growth
; chemical binding
; coagulation ultrafiltration
; fouling control
; hydrophilicity
; hydrophobicity
; membrane
; membrane resistance
; membrane stabilization
; physical chemistry
; pressure
; priority journal
; scanning electron microscopy
; stress strain relationship
; transmembrane pressure
; turbidity
; ultrafiltration
; water quality
; water treatment
英文摘要: Although conventional coagulation pre-treatment can mitigate the fouling of ultrafiltration (UF) membrane when treating raw waters, it is insufficient to restrict the development of irreversible fouling and reversible fouling to a low level. In this paper we demonstrate that the intermittent addition of H 2 O 2 into the membrane tank during backwash events (after coagulation pre-treatment) successfully prevented the development of any significant membrane fouling. Laboratory-scale tests were undertaken using two membrane systems operated in parallel over 60 days, one serving as a reference coagulation-ultrafiltration (CUF) process, and the other receiving the H 2 O 2 (CUF-H 2 O 2 ), with a decreasing dose in three successive phases: 10, 5 and 2 mg/L. The results showed that the addition of H 2 O 2 (via a separate dosing tube) during a 1 min backwash process (at 30 min intervals) reduced the growth of bacteria in the membrane tank, and the associated concentrations of soluble microbial products (SMP, including protein and polysaccharide). This resulted in a much reduced cake layer, which contained significantly less high MW organic matter (>50%), such as EPS, thereby improving the interaction between particles in the cake layer and/or particles and the membrane surface. There was also less organic matter, of all MW fractions, adsorbed in the membrane pores of the CUF-H 2 O 2 system. The addition of H 2 O 2 in the membrane tank appeared to alter the nature of the organic matter with a conversion of hydrophobic to hydrophilic fractions, which induced less organics adsorption within the hydrophobic PVDF membrane pores, and a reduced bonding ability for particles. There was no physico-chemical evidence of any deterioration of the membrane from exposure to H 2 O 2 , which indicates the feasibility of applying this novel method of fouling control for full-scale UF based water treatment processes. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122137
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom; Key Laboratory of Drinking Water Science and Technology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
Recommended Citation:
Yu W.,Graham N.,Liu T.. Prevention of UF membrane fouling in drinking water treatment by addition of H 2 O 2 during membrane backwashing[J]. Water Research,2019-01-01