Mesh-reinforced thin film composite membranes for forward osmosis applications: The structure–performance relationship

Stillman, Daniel; Krupp, Leslie; La, Young‐Hye

doi:10.1016/j.memsci.2014.06.015

Cited by 49 publications

(34 citation statements)

References 28 publications

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“…The cathode electrode was a piece of carbon cloth coated with Platinum (Pt) as the catalyst (0.3 mg Pt cm À2 ). Before use, the TFC membrane was soaked in deionized (DI) water for 30 min according to the manufacturer's instruction (Stillman et al, 2014). The surface area of the FO membrane was about 98 cm 2 .…”

Section: Osmfc Setupmentioning

confidence: 99%

Effects of current generation and electrolyte pH on reverse salt flux across thin film composite membrane in osmotic microbial fuel cells

Qin

Abu-Reesh

2016

Water Research

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a b s t r a c tOsmotic microbial fuel cells (OsMFCs) take advantages of synergy between forward osmosis (FO) and microbial fuel cells (MFCs) to accomplish wastewater treatment, current generation, and high-quality water extraction. As an FO based technology, OsMFCs also encounter reverse salt flux (RSF) that is the backward transport of salt ions across the FO membrane into the treated wastewater. This RSF can reduce water flux, contaminate the treated wastewater, and increase the operational expense, and thus must be properly addressed before any possible applications. In this study, we aimed to understand the effects of current generation and electrolyte pH on RSF in an OsMFC. It was found that electricity generation could greatly inhibit RSF, which decreased from 16.3 ± 2.8 to 3.9 ± 0.7 gMH when the total Coulomb production increased from 0 to 311 C. The OsMFC exhibited 45.9 ± 28.4% lower RSF at the catholyte pH of 3 than that at pH 11 when 40 U external resistance was connected. The amount of sodium ions transported across the FO membrane was 18.3e40.7% more than that of chloride ions. Ion transport was accomplished via diffusion and electrically-driven migration, and the theoretical analysis showed that the inhibited electrically-driven migration should be responsible for the reduced RSF. These findings are potentially important to control and reduce RSF in OsMFCs or other osmotic-driven processes.

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Section: Osmfc Setupmentioning

confidence: 99%

Effects of current generation and electrolyte pH on reverse salt flux across thin film composite membrane in osmotic microbial fuel cells

Qin

Abu-Reesh

2016

Water Research

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“…The cathode electrode was a piece of carbon cloth coated with Platinum (Pt) as the catalyst (0.3 mg Pt cm -2 ). Before use, the TFC membrane was soaked in deionized (DI) water for 30 min according to the manufacturer's instruction (Stillman et al 2014). The surface area of the FO membrane was about 98 cm 2 .…”

Section: Osmfc Setupmentioning

confidence: 99%

Resource recovery by osmotic bioelectrochemical systems towards sustainable wastewater treatment

Qin

2017

Environ. Sci.: Water Res. Technol.

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(academic)Recovering valuable resources from wastewater will transform wastewater management from a treatment focused to sustainability focused strategy, and creates the need for new technology development. An innovative treatment concept -osmotic bioelectrochemical system (OsBES), which is based on cooperation between bioelectrochemical systems (BES) and forward osmosis (FO), has been introduced and studied in the past few years. An OsBES can accomplish simultaneous treatment of wastewater and recovery of resources such as nutrient, energy, and water (NEW). The cooperation can be accomplished in either an integrated (osmotic microbial fuel cells, OsMFC) or coupled (microbial electrolysis cell-forward osmosis system, MEC-FO) configuration.In OsMFC, higher current generation than regular microbial fuel cell (MFC) was observed, resulting from the lower resistance of FO membrane. The electricity generation in OsMFC could greatly inhibit the reverse salt flux. Besides, ammonium removal was successfully demonstrated in OsMFC, making OsMFCs a promising technology for "NEW recovery" (NEW: nutrient, energy and water). For the coupled OsBES, an MEC-FO system was developed. The MEC produced an ammonium bicarbonate draw solute via recovering ammonia from synthetic organic solution, which was then applied in the FO for extracting water from the MEC anode effluent. The system has been advanced with treating landfill leachate. A mathematical model developed for ammonia removal/recovery in BES quantitatively confirmed that the NH4 + ions serve as effective proton shuttles across cation exchange membrane (CEM). Resource Recovery by Osmotic Bioelectrochemical Systems towards Sustainable Wastewater TreatmentMohan Qin Abstract (general audience)Nowadays, wastewater is no longer considered as waste. Instead, it is a pool for different kinds of resources, such as nutrient, energy, and water (NEW). Various technologies were developed to achieve NEW recovery from wastewater. A novel concept, osmotic bioelectrochemical system (OsBES) has been introduced and studied in the past few years. OsBES is based on two technologies: bioelectrochemical systems (BES) and forward osmosis (FO); and the corporation between these two technologies could accomplish simultaneous wastewater treatment and resource recovery. We investigated two kinds of OsBES: one is osmotic microbial fuel cells (OsMFC), and the other is microbial electrolysis cell-forward osmosis system (MEC-FO). For OsMFC, a mathematical model was built to understand the internal resistance, which will affect the current generation according to Om's law (I=U/R). The salt transport across the cation exchange membrane (CEM) is related to the current generation. The ion transport, especially ammonium/ammonia transport, across CEM membrane in BES was modelled, which will help the BES design and operation for ammonia recovery systems. The system performance for wastewater treatment and resource recovery in MEC-FO was fully investigated with both synthetic wastewater and landfill leach...

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“…3 (A), the PET mesh not only possesses a small thickness of only 45 μm, a large mesh opening of 64 µm and a high open area of 45%, but also is robust and hydrophilic (water contact angle is around 50-60 °C). Theoretically, these characteristics would make the PET mesh as an effective supporting fabric for high-performance osmosis membranes [11,12]. Compared to cellulose esters and other conventional materials 13 [21,32], the sulfonated polyphenylenesulfone (sPPSU) is a preferred substrate material for osmosis membranes because of its super-hydrophilic nature and good mechanical and chemical robustness [15,16,18,35].…”

Section: Characteristics Of Pet Open Mesh and Mesh-reinforced Sppsu Mmentioning

confidence: 99%

“…When increasing the polymer concentration to 17 wt%, the PET mesh in the #2 sPPSU substrate moves toward the center of the membrane crosssection and consequently reduces the macroscopic pores on its bottom surface. Since a higher polymer concentration could result in a slower demixing rate during the phase inversion, the polymer solution has more time to penetrate into the mesh and form a more continuous polymer layer underneath the mesh [11]. The commercial HTI-TFC membrane possesses a quite different bottom surface morphology compared to the sPPSU ones.…”

Section: Characteristics Of Pet Open Mesh and Mesh-reinforced Sppsu Mmentioning

confidence: 99%

“…ICP has been found to dramatically reduce the effective osmotic driving force across the membrane for water transport. The performance of the current osmotic-driven polymeric membranes is still 4 much limited by ICP, particularly for commercially available thin-film composite (TFC) membranes cast on nonwoven/woven fabrics [7,[11][12][13]. The detrimental effects of ICP can be quantitatively modeled by membrane structural parameter, S, which is partially determined by substrate materials, porosity and structure [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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High performance thin-film composite membranes with mesh-reinforced hydrophilic sulfonated polyphenylenesulfone (sPPSU) substrates for osmotically driven processes

Han

Zhao

et al. 2016

Journal of Membrane Science

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Mesh-reinforced thin film composite membranes for forward osmosis applications: The structure–performance relationship

Cited by 49 publications

References 28 publications

Effects of current generation and electrolyte pH on reverse salt flux across thin film composite membrane in osmotic microbial fuel cells

Effects of current generation and electrolyte pH on reverse salt flux across thin film composite membrane in osmotic microbial fuel cells

Resource recovery by osmotic bioelectrochemical systems towards sustainable wastewater treatment

High performance thin-film composite membranes with mesh-reinforced hydrophilic sulfonated polyphenylenesulfone (sPPSU) substrates for osmotically driven processes

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