| DOI: | 10.1016/j.watres.2018.05.007
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| Scopus记录号: | 2-s2.0-85047497227
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| 论文题名: | Temperature Enhanced Backwash |
| 作者: | Aumeier B.M.; Yüce S.; Wessling M.
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| 刊名: | Water Research
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| ISSN: | 431354
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| 出版年: | 2018
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| 卷: | 142 | | 起始页码: | 18
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| 结束页码: | 25
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| 语种: | 英语
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| 英文关键词: | Decentralized drinking water treatment
; Fouling mitigation
; Intermittent power supply
; Membrane cleaning method
; Re-contamination prevention
; Ultrafiltration
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| Scopus关键词: | Disinfection
; Electric power systems
; Evaporation
; Membranes
; Potable water
; Silica nanoparticles
; Surface waters
; Ultrafiltration
; Dead-end ultrafiltration
; Electrical power supply
; Elevated temperature
; Fouling mitigation
; Mathematical descriptions
; Membrane cleaning
; Power supply
; Steam-water mixture
; Water treatment
; drinking water
; river water
; silica nanoparticle
; surface water
; drinking water
; electrical power
; evaporation
; experimental study
; filtration
; fouling
; humic acid
; membrane
; nanoparticle
; numerical method
; river water
; silica
; temperature effect
; ultrafiltration
; water treatment
; Article
; evaporation
; gravity
; mathematical analysis
; methodology
; power supply
; priority journal
; suspended particulate matter
; temperature
; temperature enhanced backwash
; ultrafiltration
; water treatment
; water vapor
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| 英文摘要: | Decentralized drinking water treatment is limited by supply of service, consumables, spare parts and in particular, power. Therefore, gravity-driven dead-end ultrafiltration is applied to purify surface water with high suspended solid loading. To obtain high flux in the long term, an effective membrane backwash is mandatory. Also, disinfection and cleaning is required regularly. Here we propose a new process coping with these particular challenges in decentralized water production: Temperature Enhanced Backwash. Herein, the membrane is backwashed at elevated temperature and corresponding steam pressure. A mathematical description of the Temperature Enhanced Backwash reveals that membrane pores are filled predominantly with liquid phase, irrespectively of whether membranes are charged with saturated steam or boiling liquid. A steam - water mixture is discharged at the module outlet suggesting evaporation at the end of the pores. This evaporation at membrane - fluid interface supposedly creates high volume fluxes shearing off potential fouling layers. Combined with gravity-driven filtration, the overall process potentially can cope with highly intermittent electrical power supply or even its absence. The methodology shows competitive cleaning efficacy compared to mechanical backwashing as demonstrated experimentally using silica nanoparticles, humic acid and river water. © 2018 Elsevier Ltd |
| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/112604
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| Appears in Collections: | 气候减缓与适应
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作者单位: | RWTH Aachen University, Chemical Process Engineering, Forckenbeckstrasse 51, Aachen, 52074, Germany; DWI - Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, Aachen, 52074, Germany
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| Recommended Citation: | |
Aumeier B.M.,Yüce S.,Wessling M.. Temperature Enhanced Backwash[J]. Water Research,2018-01-01,142
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