Novel dual-layer hollow fiber membranes applied for forward osmosis process

Setiawan, Laurentia; Wang, Rong; Shi, Lei; Li, K.; Fane, Anthony G.

doi:10.1016/j.memsci.2012.07.020

Cited by 80 publications

(52 citation statements)

References 37 publications

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“…ICP is an inherent phenomenon associated with the thick supporting layer of commercially available RO membranes [18]. Indeed, most research progress in current FO applications and exploration of new applications can be attributed to the development of improved semi-permeable membranes as well as novel techniques to fabricate FO membranes [19][20][21]. Recently reported FO membranes can achieve high water flux and salt rejection with minimal ICP and excellent mechanical strength.…”

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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. 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: 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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show abstract

“…Another study utilized polyamide-imide (PAI) as hollow fiber substrate material followed by polyelectrolyte post-treatment with ployethyleneimine (PEI) to achieve a NF-like selective layer [21]. Similarly, a dual-layer composite membrane comprised of PAI/PES was also investigated [25]. These membranes all exhibited good flux performance, but were still limited to nanofiltration selectivity.…”

Section: Introductionmentioning

confidence: 99%

Polyacrylonitrile supported thin film composite hollow fiber membranes for forward osmosis

Ren

McCutcheon

2015

Desalination

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Thin film composite (TFC) hollow fiber membranes have shown great promise as a platform for osmotic processes such as forward osmosis (FO) and pressure retarded osmosis (PRO). Previous work on asymmetric FO membranes demonstrated that employing a hydrophilic supporting structure is essential to promote wetting and mitigate concentration polarization. In this study, we have developed an intrinsically hydrophilic polyacrylonitrile (PAN) hollow fiber supported TFC membrane. A selective polyamide thin film was synthesized on the membrane shell side via interfacial polymerization. The impact of fiber pore structure was investigated during our study with some of our membranes exhibiting water flux of 36.6 L m −2 h −1 using 1 M sodium chloride draw solution against deionized water in PRO mode. These results suggest the potential of utilizing intrinsically hydrophilic polymeric hollow fibers with finely tuned pore structures as support for TFC membranes for osmotic processes.

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“…Dual-layer hollow fiber membranes are consisted of a functional outer layer and a porous matrix layer in which an extremely high-performance or functional membrane material as the selective layer and a low-cost material as the supporting layer are used [1][2][3]. Due to its high performance and low cost, it had been used for specific applications, including gas separation [1,4], pervaporation [5], membrane distillation [6,7], forward osmosis [2,3], nanofiltration [8] and ultrafiltration [9].…”

Section: Introductionmentioning

confidence: 99%

“…Due to its high performance and low cost, it had been used for specific applications, including gas separation [1,4], pervaporation [5], membrane distillation [6,7], forward osmosis [2,3], nanofiltration [8] and ultrafiltration [9]. For all these dual-layer hollow fiber membranes, the matrix membrane was fabricated by nonsolvent-induced phase separation (NIPS) method which exhibited poor mechanical performance.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on interface structure and performance of homogeneous-reinforced polyvinyl chloride hollow fiber membranes

et al. 2015

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Novel dual-layer hollow fiber membranes applied for forward osmosis process

Cited by 80 publications

References 37 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

Polyacrylonitrile supported thin film composite hollow fiber membranes for forward osmosis

Study on interface structure and performance of homogeneous-reinforced polyvinyl chloride hollow fiber membranes

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