Osmotically and Thermally Isolated Forward Osmosis–Membrane Distillation (FO–MD) Integrated Module

Kim, Youngjin; Li, Sheng; Francis, Lijo; Li, Zhenyu; Linares, Rodrigo Valladares; Alsaadi, Ahmad Salem; Abu-Ghdaib, Muhannad; Son, Hyuk Soo; Amy, Gary L.; Ghaffour, Noreddine

doi:10.1021/acs.est.8b05587

Cited by 58 publications

(24 citation statements)

References 57 publications

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“…It shows that the FO flux increased from 11.17 ± 3.85 to 30.19 ± 5.51 L m −2 h −1 when the temperature differences was increased from 20 to 60 °C, which was comparable with other studies [ 36 , 39 , 40 , 41 ]. As reported by Kim et al [ 36 ], the significant augmentation of water flux could be justified by analyzing two effects: ( i ) an increase in osmotic pressure induced by high temperature, according to the van ’t Hoff equation [ 42 ] and ( ii ) an increase in the diffusivity of draw solutes due to an increase of DS temperature according to Stokes–Einstein equation which reduced the mass transfer resistance [ 43 ]. Increasing the temperature of DS promoted the heat transfer to the FS across the FO membrane due to temperature polarization.…”

Section: Resultssupporting

confidence: 91%

The Water Flux Dynamic in a Hybrid Forward Osmosis-Membrane Distillation for Produced Water Treatment

et al. 2020

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Standalone membrane distillation (MD) and forward osmosis (FO) have been considered as promising technologies for produced water treatment. However, standalone MD is still vulnerable to membrane-wetting and scaling problems, while the standalone FO is energy-intensive, since it requires the recovery of the draw solution (DS). Thus, the idea of coupling FO and MD is proposed as a promising combination in which the MD facilitate DS recovery for FO—and FO acts as pretreatment to enhance fouling and wetting-resistance of the MD. This study was therefore conducted to investigate the effect of DS temperature on the dynamic of water flux of a hybrid FO–MD. First, the effect of the DS temperature on the standalone FO and MD was evaluated. Later, the flux dynamics of both units were evaluated when the FO and DS recovery (via MD) was run simultaneously. Results show that an increase in the temperature difference (from 20 to 60 °C) resulted in an increase of the FO and MD fluxes from 11.17 ± 3.85 to 30.17 ± 5.51 L m−2 h−1, and from 0.5 ± 0.75 to 16.08 L m−2 h−1, respectively. For the hybrid FO–MD, either MD or FO could act as the limiting process that dictates the equilibrium flux. Both the concentration and the temperature of DS affected the flux dynamic. When the FO flux was higher than MD flux, DS was diluted, and its temperature decreased; both then lowered the FO flux until reaching an equilibrium (equal FO and MD flux). When FO flux was lower than MD flux, the DS was concentrated which increased the FO flux until reaching the equilibrium. The overall results suggest the importance of temperature and concentration of solutes in the DS in affecting the water flux dynamic hybrid process.

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Section: Resultssupporting

confidence: 91%

The Water Flux Dynamic in a Hybrid Forward Osmosis-Membrane Distillation for Produced Water Treatment

et al. 2020

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“…This hypothesis was previously presented by Goosen et al [46] whose work revealed a change in the membrane's pore size when the feed solution temperature increases from 30 °C to 40 °C. Other studies also found an optimum Jw and RSF under different draw solution temperatures [47]. In our study, we also find that the temperature near the membrane surface affects more the Jw and RSF than the bulk temperatures (Fig.…”

Section: Influence Of Draw and Feed Temperaturessupporting

confidence: 84%

Predicting the performance of large-scale forward osmosis module using spatial variation model: Effect of operating parameters including temperature

Lee

Ghaffour

2019

Desalination

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Forward osmosis (FO) is considered as an energy-efficient process for numerous applications.Although its performance is determined by the spatially varied operation factors and the length of the channel, most of the reported simulation studies rely on length-averaged lumped models.Here, we introduce a one-D model based on heat and mass transfer and transport behavior for both bulk draw and feed channel flows. We find prediction results to be in good agreement with two different experimental results at inlet feed temperatures below 25 °C. However, the difference of water flux (Jw) and reverse salt flux (RSF) between measured and predicted data increases when both feed and draw temperatures also increase. Our theoretical simulation study first reveals that the feed temperature near the membrane active layer surface is the main factor for improving water and salt permeabilities. We find that, with a channel width of 0.3 m and a channel length of 2.5 m, Jw and RSF calculated using the length-averaged based lumped model are overestimated by 13.01% and 13.12%, respectively, compared to those obtained using our new spatial variation model. Our study demonstrates that the length-averaged based lumped model is not an appropriate simulation model to predict the performance of large-scale FO modules at lower inlet velocities.

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“…Each of these processes has advantages at the cost of more or less severe drawbacks and their association with MD offers improvement opportunities. Kim et al [129] proposed a novel module design to integrate FO and MD. The two processes are sealed in one module and operated simultaneously, making the system compact and suitable for a wide range of applications.…”

Section: Hybrid and Integrated Systemsmentioning

confidence: 99%

Comparative Analysis of Conventional and Emerging Technologies for Seawater Desalination: Northern Chile as A Case Study

et al. 2021

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The aim of this work was to study different desalination technologies as alternatives to conventional reverse osmosis (RO) through a systematic literature review. An expert panel evaluated thermal and membrane processes considering their possible implementation at a pilot plant scale (100 m3/d of purified water) starting from seawater at 20 °C with an average salinity of 34,000 ppm. The desalination plant would be located in the Atacama Region (Chile), where the high solar radiation level justifies an off-grid installation using photovoltaic panels. We classified the collected information about conventional and emerging technologies for seawater desalination, and then an expert panel evaluated these technologies considering five categories: (1) technical characteristics, (2) scale-up potential, (3) temperature effect, (4) electrical supply options, and (5) economic viability. Further, the potential inclusion of graphene oxide and aquaporin-based biomimetic membranes in the desalinization processes was analyzed. The comparative analysis lets us conclude that nanomembranes represent a technically and economically competitive alternative versus RO membranes. Therefore, a profitable desalination process should consider nanomembranes, use of an energy recovery system, and mixed energy supply (non-conventional renewable energy + electrical network). This document presents an up-to-date overview of the impact of emerging technologies on desalinated quality water, process costs, productivity, renewable energy use, and separation efficiency.

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Osmotically and Thermally Isolated Forward Osmosis–Membrane Distillation (FO–MD) Integrated Module

Cited by 58 publications

References 57 publications

The Water Flux Dynamic in a Hybrid Forward Osmosis-Membrane Distillation for Produced Water Treatment

The Water Flux Dynamic in a Hybrid Forward Osmosis-Membrane Distillation for Produced Water Treatment

Predicting the performance of large-scale forward osmosis module using spatial variation model: Effect of operating parameters including temperature

Comparative Analysis of Conventional and Emerging Technologies for Seawater Desalination: Northern Chile as A Case Study

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