A new commercial thin film composite membrane for forward osmosis

Ren, Jian; McCutcheon, Jeffrey R.

doi:10.1016/j.desal.2013.11.026

Cited by 240 publications

(164 citation statements)

References 25 publications

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“…As shown in Table 1, the Exp 7m membrane had the highest S value, followed by the Exp 3m and the pristine membranes, respectively. This result could be ascribed to the swelling of the polymer supporting layer after prolonged exposure to activated sludge, which likely increased the tortuosity and decreased the porosity of the membrane supporting layer [24].…”

Section: [Table 1]mentioning

confidence: 99%

“…TFC FO membranes comprise a thin, selective polyamide active layer on a porous supporting layer and have been reported to show higher water permeability and solute rejection capacity in comparison with CTA membranes [24][25][26]. The thin and highly porous supporting layer of CTA and TFC FO membranes considerably reduces the ICP encountered for commercial RO membranes in FO applications [18,27].…”

Section: Introductionmentioning

confidence: 99%

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Biodegradation of cellulose triacetate and polyamide forward osmosis membranes in an activated sludge bioreactor: Observations and implications

Luo

Xie

Hai

et al. 2016

Journal of Membrane Science

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. Biodegradation of cellulose triacetate and polyamide forward osmosis membranes in an activated sludge bioreactor: observations and implications. Journal of Membrane Science, 510 284-292. Biodegradation of cellulose triacetate and polyamide forward osmosis membranes in an activated sludge bioreactor: observations and implications AbstractThis study investigated long-term stability of forward osmosis (FO) membranes against biodegradation during prolonged exposure to activated sludge. Results show that cellulose triacetate (CTA) membranes were more resistant against biodegradation than polyamide thin film composite (TFC) ones. Nevertheless, CTA membrane biodegradation was discernible after seven months of exposure to activated sludge as manifested by an increase in the membrane average pore size, water and salt permeability, and membrane structural parameter. Asaresult, of prolonged exposure to activated sludge, the water and reverse salt fluxes of the CTA membrane increased; and concomitantly the rejection of a range of trace organic contaminants decreased significantly. The impact of prolonged exposure to activated sludge on the polyamide active layer of TFC FO membranes was even more severe. Our results indicate that currently available commercial CTA and polyamide TFC FO membranes may not be readily compatible for practical osmotic membrane bioreactor (OMBR) operation. Thus, the development of new and robust FO membrane materials specifically designed for membrane bioreactor operation is essential for commercial OMBR applications. Disciplines Engineering | Science and Technology Studies

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Section: [Table 1]mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biodegradation of cellulose triacetate and polyamide forward osmosis membranes in an activated sludge bioreactor: Observations and implications

Luo

Xie

Hai

et al. 2016

Journal of Membrane Science

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“…Contact angle (CA) of demineralized water on the membrane surface was measured using sessile drop method. The CA values were measured at room temperature and taken as an average of six points with a droplet volume of 10 ± 1 μL [31]. Prior to CA measurement, the membranes were dried in vacuum desiccators for 48 hours.…”

Section: Characterization Of Modified Psf Membranementioning

confidence: 99%

Modified Polysulfone Ultrafiltration Membrane for Humic Acid Removal During Peat Water Treatment

Aryanti

Noviyani

Kurnia

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In this research, UF membrane was prepared by blending polysulfone (PSf) in DMAc with the addition of PEG400 and low concentration of acetone as additives. The effect of PSf/PEG400 and polymer/solvent ratio on the performance of PSf membrane was investigated during two hours of peat water filtration. The results showed that the increase of ratio PSF/PEG400 from 1:1 to 1:2.5 improved the membrane hydrophilicity. It was indicated by a decrease of water contact angle from 62 o to 33 o and increased water content in membrane structure from 65 to 74,5%. In addition, the pure water flux also increased up to 200 times. A stable flux is achieved when the ratio PSf/PEG is 1:2 and resulted in 84% rejection of humic acid. The increase of polymer concentration in the membrane solution reduced the pure water flux but increased the rejection of humic acid. Higher polymer concentration in membrane solution reduced fouling tendency towards the membrane surface. It showed that flux decline was reduced from 60% to 40% when the ratio of polymer/solvent concentration was changed from 40/60 to 50/50.

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“…As noted by others [9] numerous academic groups around the world have made new membranes for forward osmosis but at full-scale production the dominant platform has been a cellulose acetate membrane from Hydration Technology Innovations (HTI). Whilst [9] reported on a newly launched forward osmosis membrane from HTI, namely their thin film composite (TFC) membrane, our study was based on their traditional cellulose acetate membrane.…”

Section: Introductionmentioning

confidence: 99%

“…Whilst [9] reported on a newly launched forward osmosis membrane from HTI, namely their thin film composite (TFC) membrane, our study was based on their traditional cellulose acetate membrane.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the influence of module construction upon forward osmosis performance

et al. 2018

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. (2018) 'Analysis of the in uence of module construction upon forward osmosis performance. ', Desalination., Further information on publisher's website: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractThe potential of a commercial forward osmosis (FO) module to recover water from NEWater brine, an RO retentate, was assessed by taking an innovative approach to obtaining the mass transfer coefficients. The performance comparison of the spiral wound (S-W) FO module with that of the flat sheet laboratory unit suggests that the winding involved in S-W construction can adversely affect performance; the values for the S-W mass transfer coefficients were half of those expected. This firstof-its-kind performance comparison utilised coupons of the membrane and spacers taken from the module. The module was used both in the conventional manner for FO and in the reverse manner with the active layer facing the draw solution. Estimates of membrane parameters and mass transfer coefficients experiments for the two orientations were obtained using pure water, 10mM and 25mM NaCl solution on the feed side and 1M NaCl as draw solution. The fouling potential of NEWater brine per se was found to be low. These are the first results with a S-W module that suggest potential for this niche application; nevertheless the level of the water flux through the S-W module clearly indicates that industrial applications of S-W FO will be constrained to special cases.

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A new commercial thin film composite membrane for forward osmosis

Cited by 240 publications

References 25 publications

Biodegradation of cellulose triacetate and polyamide forward osmosis membranes in an activated sludge bioreactor: Observations and implications

Biodegradation of cellulose triacetate and polyamide forward osmosis membranes in an activated sludge bioreactor: Observations and implications

Modified Polysulfone Ultrafiltration Membrane for Humic Acid Removal During Peat Water Treatment

Analysis of the influence of module construction upon forward osmosis performance

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