Experimental Study of Ultrasonic Effects on Flux Enhancement in Forward Osmosis Process

Kim, Hyunse; Lee, Yanglae; Elimelech, Menachem; Adout, Atar; Kim, Yu Chang

doi:10.1149/ma2012-01/4/90

Cited by 2 publications

(3 citation statements)

References 5 publications

(6 reference statements)

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“…Other studies that have been conducted on ultrasound-assisted FO cannot be utilized to validate Eqs. ( 3) and ( 4) because either they applied intermittent (not continuous) ultrasound mode (Chanukya and Rastogi 2017;Nguyen et al 2015), the applied ultrasound frequency significantly deviates from the one used in this study (Choi et al 213;Heikkinen et al 2017), or they did not report the applied ultrasound frequency (Kim et al 2012). Qasim et al (2020) investigated the effect of ultrasound on the performance of the FO process with MgSO 4 and CuSO 4 draw solutions.…”

Section: Applicability Of the Developed Relations To Other Data Setsmentioning

confidence: 92%

“…In order to simulate the salinity, scaling agents, and algae features of seawater as closely as possible, the feed solution (FS) was created utilizing a variety of ingredients. Calcium sulfate dihydrate (CaSO 4 •2H 2 O) was used to represent inorganic fouling and scaling materials (Choi et al 2013;Kim et al 2012), sodium alginate was used to simulate the algal organic matter biofouling that would exist in seawater intakes (Mi and Elimelech 2008), and sodium chloride (NaCl) was used to simulate the dissolved solids content (Qasim et al 2020). In every test, the initial draw solution (DS) concentration was fixed at 4.5 M for NaCl and 2 M for MgCl 2 .…”

Section: Methodsmentioning

confidence: 99%

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Assessment of ultrasound-assisted forward osmosis process performance for seawater desalination using experimental factorial design

2022

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The effect of ultrasound on water flux through forward osmosis membrane for seawater desalination was investigated using the factorial design approach. Sodium chloride (NaCl) was used to simulate the dissolved solids content. In every test, the initial draw solution (DS) concentration was fixed at 4.5 M for NaCl and 2 M for MgCl2. Parameters considered in the investigation included membrane crossflow velocity (0.25 and 1.0 cm/s), flow configuration (co-current versus counter-current), direction of ultrasound waves relative to the membrane side (active layer versus support layer), and type of draw solution (NaCl versus MgCl2). A two-level factorial design was considered in the analysis of the results obtained from the experimental work. Based on the factorial design analysis, crossflow velocity and use of ultrasound have a positive effect on water flux enhancement for both draw solutions. However, the velocity effect on water flux enhancement was more pronounced than that of the use of ultrasound. The effect of flow configuration was statistically insignificant for both draw solutions. The interaction effect between crossflow velocity and ultrasound was statistically significant for both draw solutions. However, the interaction between crossflow velocity and flow configuration was only significant for the case of MgCl2. The three-way interaction was insignificant for both draw solutions. The developed factorial model equations were used to predict other flux data in ultrasound-assisted FO systems and showed adequate representation of these data at relatively similar conditions after adjustment of the model for the baseline conditions of the evaluated cases.

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Section: Applicability Of the Developed Relations To Other Data Setsmentioning

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Assessment of ultrasound-assisted forward osmosis process performance for seawater desalination using experimental factorial design

2022

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“…However, the number of conducted studies is very limited and diverse in terms of the intended applications and testing conditions. Nonetheless, there is a consensus that coupling ultrasound with FO would enhance the water flux through the membrane under certain conditions [23][24][25][26][27]. The previously reported enhancement of flux with the use of ultrasound-assisted FO for water desalination could be challenged by the fact that most of these studies were not conducted using feed solutions that closely resemble brackish or seawater.…”

Section: Introductionmentioning

confidence: 99%

Effects of Operating Conditions on the Performance of Forward Osmosis with Ultrasound for Seawater Desalination

Al-Sakaji

Al‐Asheh

Maraqa

2022

Water

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This study investigates the effect of using ultrasound on water flux through a forward osmosis membrane when applied for seawater desalination. A synthetically prepared solution simulating seawater with scaling substances and organic foulants was used. The parameters considered include membrane cross-flow velocity, flow configuration (co-current versus counter-current), direction of ultrasound waves relative to the membrane side (active layer versus support layer), and type of draw solution (NaCl versus MgCl2). The study revealed that applying a continuous ultrasound frequency of 40 kHz was effective in enhancing water flux, especially when the ultrasound source faces the membrane active layer, irrespective of the used draw solution. The highest water flux enhancement (70.8% with NaCl draw solution and 61.9% with MgCl2 draw solution) occurred at low cross-flow velocity and with the ultrasound waves facing the membrane active layer. It was also observed that the use of ultrasound generally caused an adverse effect on the water flux when the ultrasound source faces the membrane support layer. Moreover, applying the ultrasound at the membrane support layer increased the reverse solute flux. For all tested cases, higher water flux enhancement was observed with NaCl as a draw solution compared to the cases when MgCl2 was used as a draw solution.

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Experimental Study of Ultrasonic Effects on Flux Enhancement in Forward Osmosis Process

Abstract: not Available.

Cited by 2 publications

References 5 publications

Assessment of ultrasound-assisted forward osmosis process performance for seawater desalination using experimental factorial design

Assessment of ultrasound-assisted forward osmosis process performance for seawater desalination using experimental factorial design

Effects of Operating Conditions on the Performance of Forward Osmosis with Ultrasound for Seawater Desalination

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