DOI: 10.1016/j.watres.2019.01.014
Scopus记录号: 2-s2.0-85060628932
论文题名: Desalination of brackish groundwater and reuse of wastewater by forward osmosis coupled with nanofiltration for draw solution recovery
作者: Giagnorio M. ; Ricceri F. ; Tiraferri A.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 134
结束页码: 143
语种: 英语
英文关键词: Brackish groundwater
; Desalination
; Draw solution recovery
; Forward osmosis
; Nanofiltration
; Wastewater
; Water reuse
Scopus关键词: Chlorine compounds
; Desalination
; Effluents
; Groundwater
; Magnesium compounds
; Nanofiltration
; Osmosis
; Quality control
; Sodium sulfate
; Sulfur compounds
; Wastewater
; Wastewater reclamation
; Wastewater treatment
; Water conservation
; Brackish ground water
; Draw solutions
; Economic feasibilities
; Forward osmosis
; Magnesium chlorides
; Physical cleanings
; Reuse of wastewater
; Water reuse
; Water filtration
; ground water
; magnesium chloride
; sodium sulfate
; brackish water
; desalination
; feasibility study
; filtration
; osmosis
; recycling
; solute
; technical efficiency
; wastewater treatment
; water flux
; Article
; desalination
; effluent
; nanofiltration
; osmosis
; osmotic pressure
; permeability
; priority journal
; reverse osmosis
; salinity
; solute
; waste water
; waste water recycling
英文摘要: This study evaluates a treatment system centered on forward osmosis (FO) to extract high-quality water from real brackish groundwater and wastewater. The groundwater had salinity of 4 g/L, while the wastewater sample consisted of a secondary effluent. These feed solutions were treated first in a FO step, achieving a recovery of >60%. Subsequently, the diluted draw solutions were subject to a nanofiltration (NF) step to regenerate their original osmotic pressure and to simultaneously collect a final permeate product. Magnesium chloride and sodium sulfate were both suitable draw solutes for this application. MgCl 2 had a larger specific reverse salt flux and induced a more pronounced fouling-related flux decline with groundwater samples. Na 2 SO 4 was re-concentrated with a higher permeability NF membrane but may require the use of anti-scalants. The average fluxes obtained in high-recovery batch FO were between 5 and 11 L m −2 h −1 with an initial bulk draw osmotic pressure in the range of 12–15 bar. Relatively low flux decline was observed in fouling experiments with both samples, while physical cleaning proved promising to recover the related loss in productivity. The final product waters were all of very high quality, suggesting the potential of this coupled system for water reuse and desalination. Some challenges related to the relatively low water flux in the FO step, as well as the loss of draw solutes and the gradual change in composition of the draw solution, need further analysis to establish the technical and economic feasibility of the system. © 2019 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121988
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environment, Land and Infrastructure Engineering (DIATI), Politecnico di Torino, Corso Duca degli Abruzzi 24, Turin, 10129, Italy; CleanWaterCenter@PoliTo, Politecnico di Torino, Corso Duca degli Abruzzi 24, Turin, 10129, Italy
Recommended Citation:
Giagnorio M.,Ricceri F.,Tiraferri A.. Desalination of brackish groundwater and reuse of wastewater by forward osmosis coupled with nanofiltration for draw solution recovery[J]. Water Research,2019-01-01