A multi-barrier osmotic dilution process for simultaneous desalination and purification of impaired water

Cath, Tzahi Y.; Hancock, Nathan T.; Lundin, Carl D.; Hoppe‐Jones, Christiane; Drewes, Jörg E.

doi:10.1016/j.memsci.2010.06.056

Cited by 293 publications

(197 citation statements)

References 25 publications

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“…The rejection rates of various pollutants in wastewater by FO membrane have been reported in some recent publications [14,15,25,26]. The present study aimed to investigate the feasibility of FO of concentrating the organic matters from energy recovery points of view.…”

Section: Water Analysis and Membrane Characterizationmentioning

confidence: 88%

“…For instance, Lutchmiah et al investigated water recovery from primary effluent of WWTP by FO and found that it was technically feasible to effectively remove most of the pollutants for clean water production [14]. Cath et al studied FO filtration of secondary and tertiary treated effluent and claimed that FO could be an alternative process for water production [15].…”

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confidence: 99%

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Processing municipal wastewaters by forward osmosis using CTA membrane

Zhang

Ning

Wang

et al. 2014

Journal of Membrane Science

104

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Direct sewage filtration by forward osmosis (FO) was investigated with the aim of concentrating organic matters in sewage into a small volume of energy source. The results showed that chemical oxidation demand (COD) in the feed sewage solution was concentrated by more than 300%. Although a gradual decline in membrane flux with filtration time occurred, a flux of 3-7.4 L m -2 h -1 was still produced satisfactorily. The membrane flux decline was caused by both membrane fouling and the decline of osmotic driving force due to the salinity change in both feed solution and draw solution. The membrane fouling analysis indicated that the fouling was mainly attributed to the formation of cake layer on the membrane surface in both membrane orientation, the active layer facing the feed side (AL-FS) and the active layer facing the draw solution side (AL-DS). However, AL-FS outperformed AL-DS in terms of membrane flux and fouling. This study may offer new insight into the development of lowenergy wastewater treatment processes and energy recovery. 2 HighlightsOrganic matters in sewage can be effectively concentrated to small volume by FO.Membrane flux decline is caused by both membrane fouling and the decline of osmotic driving force.Cake layer is the dominant contributor to the membrane fouling.This study offers new insight into the development of low-energy wastewater treatment.

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Section: Water Analysis and Membrane Characterizationmentioning

confidence: 88%

mentioning

confidence: 99%

Processing municipal wastewaters by forward osmosis using CTA membrane

Zhang

Ning

Wang

et al. 2014

Journal of Membrane Science

104

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“…This equation, however, assumes a well-stirred system without the presence of boundary layers, which in ODMPs occur on both the feed and draw solution sides of the membrane and inside the porous support layer of the membrane. McCutcheon et al [30,31] presented a model for osmotic flux across a dense, symmetric membrane: (2) where π D,b and π F,b are the bulk osmotic pressures of the draw and feed solutions, respectively, and k D and k F are the mass transfer coefficients on the draw and feed solution sides of the membrane, respectively. This implicit flux model incorporates concentration polarization moduli that account for boundary layer phenomenon on both sides of the membrane.…”

Section: Governing Equations In Odmpsmentioning

confidence: 99%

“…Osmotically driven membrane processes (ODMP) are innovative technologies with applications in water treatment and desalination (forward osmosis, FO), power generation (pressure retarded osmosis, PRO), and dewatering of aqueous solutions (direct osmotic concentration, DOC, and osmotic dilution, ODN) [1][2][3][4]. These methods utilize osmotic pressure difference between a dilute feed solution and a concentrated draw solution to induce mass transport of water through semipermeable membranes from the feed stream into the draw solution.…”

Section: Introductionmentioning

confidence: 99%

Standard Methodology for Evaluating Membrane Performance in Osmotically Driven Membrane Processes

et al. 2013

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Osmotically driven membrane processes (ODMPs) such as forward osmosis (FO) and pressure retarded osmosis (PRO) are extensively investigated for utilization in a broad range of applications. In ODMPs, the operating conditions and membrane properties play more critical roles in mass transport and process performance than in pressure-driven membrane processes. Search of the literature reveals that ODMP membranes, especially newly developed ones, are tested under different temperatures, draw solution compositions and concentrations, flow rates, and pressures. In order to compare different membranes, it is important to develop standard protocols for testing of membranes for ODMPs. In this article we present a standard methodology for testing of ODMP membranes based on experience gained and operating conditions used in FO and PRO studies in recent years. A round-robin testing of two commercial membranes in seven independent laboratories revealed that water flux and membrane permeability coefficients were similar when participants performed the experiments and calculations using the same protocols. The thin film composite polyamide membrane exhibited higher water and salt permeability than the asymmetric cellulosebased membrane, but results with the high permeability thin-film composite membrane were more scattered. While salt rejection results in RO mode were relatively similar, salt permeability coefficients for both membranes in FO mode were more varied. Results suggest that high permeability ODMP membranes should be tested at lower hydraulic pressure in RO mode and that RO testing be conducted with the same membrane sample used for testing in FO mode. AbstractOsmotically driven membrane processes (ODMP) such as forward osmosis (FO) and pressure retarded osmosis (PRO) are extensively investigated for utilization in a broad range of applications. In ODMPs, the operating conditions and membrane properties play more critical roles in mass transport and process performance than in pressure-driven membrane processes.Search of the literature reveals that ODMP membranes, especially newly developed ones, are tested under different temperatures, draw solution compositions and concentrations, flowrates, and pressures. In order to compare different membranes, it is important to develop standard protocols for testing of membranes for ODMP. In this article we present a standard methodology for testing of ODMP membranes based on experience gained and operating conditions used in FO and PRO studies in recent years. A round-robin testing of two commercial membranes in seven independent laboratories revealed that water flux and membrane permeability coefficients were similar when participants performed the experiments and calculations using the same protocols. The thin film composite polyamide membrane exhibited higher water and salt permeability than the asymmetric cellulose-based membrane, but results with the high permeability thin-film composite membrane were more scattered. While salt rejection results in RO mode were...

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“…It only requires hydraulic pressure for pumping/circulation thus requires low operational energy. FO has shown effective for isolation of emerging contaminants in wastewater that often bypassing all treatments and eventually accumulate in the water bodies (Cartinella et al, 2006;Cath et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Module-scale simulation of forward osmosis module-part B: Modified Spiral-Wound

Bilad

2017

IJOST

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Forward osmosis (FO) is an attractive technology that offers advantages especially for treatment of challenging feeds in comparison to other membrane technologies. Substantial developments of membrane material have been shown recently. To support further development of FO process, a larger scale study via membrane module development is required to accurately envisage the most critical factors to be exploited to realize the promises. In this study, we applied a mass-transfer model coupled with the mass conservation and area discretization to simulate the performance of modified spiral-wound (MSW) modules (10 sheets of 1x1m). The study focuses on the spatial flux profile in a full-scale module as function of operational mode: co- vs counter cross current and membrane orientations (active-layer facing feed (ALFS); solution and active layer facing draw solution, (ALDS)). Results show that all modes offer almost similar average flux of about 9-10 L/m2h, but the co-current flows have much higher flux ranges (≈43%). The latter is expected to worsen membrane fouling resistant due to mal distribution in hydraulic loading. An operation with counter current and ALFS and counter current flow is then recommended because it offer similar flux but lower spatial flux ranges (7%).

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A multi-barrier osmotic dilution process for simultaneous desalination and purification of impaired water

Cited by 293 publications

References 25 publications

Processing municipal wastewaters by forward osmosis using CTA membrane

Processing municipal wastewaters by forward osmosis using CTA membrane

Standard Methodology for Evaluating Membrane Performance in Osmotically Driven Membrane Processes

Module-scale simulation of forward osmosis module-part B: Modified Spiral-Wound

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