Water desalination using membrane distillation with acidic stabilization of scaling layer thickness

Gryta, Marek

doi:10.1016/j.desal.2015.02.031

Cited by 21 publications

(5 citation statements)

References 29 publications

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“…Analysis of SEM image showed possible superficial tears of the membrane in the pressurized air backwashing technique [195]. The risk of partial membrane wettability can also be limited by reducing the period between cleaning process to maintain a thin scaling layer on the membrane surface [203]. Removal of scaling from the membrane surface in quick intervals limits the degree of oversaturation inside the wetted pores, which reduces internal scaling [203].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…The risk of partial membrane wettability can also be limited by reducing the period between cleaning process to maintain a thin scaling layer on the membrane surface [203]. Removal of scaling from the membrane surface in quick intervals limits the degree of oversaturation inside the wetted pores, which reduces internal scaling [203]. The dissolution of pore deposits can initiate wetting as a result of internal scaling [204][205].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Fouling and wetting in the membrane distillation driven wastewater reclamation process – A review

Choudhury

Anwar

Jassby

et al. 2019

Advances in Colloid and Interface Science

189

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Fouling and wetting of membranes are significant concerns that can impede widespread application of the membrane distillation (MD) process during high-salinity wastewater reclamation. Fouling, caused by the accumulation of undesirable materials on the membrane surface and pores, causes a decrease in permeate flux. Whereas membrane wetting, the direct permeation of the feed solution through the membrane pores, results in reduced contaminant rejection and overall process failure. Lately, the application of MD for water recovery from various types of wastewaters has gained increased attention among researchers. In this review, we discuss fouling and wetting phenomena observed during the MD process, along with the effects of various mitigation strategies. In addition, we examine the interactions between contaminants and different types of MD membranes and the influence of different operating conditions on the occurrence of fouling and wetting. We also report on previously investigated feed pre-treatment options before MD, application of integrated MD processes, the performance of fabricated/modified MD membranes, and strategies for MD membrane maintenance during water reclamation. We also discussed energy consumption and economic aspects of MD for wastewater recovery. Throughout the review, we engage in discussions highlighting research needs for furthering the development of MD: notably the incorporation of MD in the overall wastewater treatment and recovery scheme (including selection of appropriate membrane material, suitable pre-treatment or integrated processes, and membrane maintenance strategies), and the application of MD in long-term pilot-scale studies using real wastewater.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Accepted Manuscriptmentioning

confidence: 99%

Fouling and wetting in the membrane distillation driven wastewater reclamation process – A review

Choudhury

Anwar

Jassby

et al. 2019

Advances in Colloid and Interface Science

189

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show abstract

“…Surface wetting of hydrophobic membranes happens when hydrophilic groups (e.g., C=O, OH, and COOH) forms on the polypropylene surface [54]. But, when the air bubbles are introduced in the feed, SDS diffuses in water molecules and adsorb at the interfaces of air and water.…”

Section: Effect Of High Salinity Feed On Wettingmentioning

confidence: 99%

Wetting prevention in membrane distillation through superhydrophobicity and recharging an air layer on the membrane surface

Rezaei

Warsinger

Lienhard

et al. 2017

Journal of Membrane Science

123

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Although membrane distillation offers distinctive benefits in some certain areas, i.e., RO concentrate treatment, concentrating solutions in the food industry and solar heat utilization, the occurrence of wetting of the hydrophobic membrane hinders its potential industrial applications.Therefore, wetting prevention is a vital criterion for the treatment of solutions with lower surface tension than water. The present work examines the effect of recharging air bubbles on the membrane surface for the wetting incidence when a surfactant (sodium dodecyl sulfate, SDS) exists in a highly concentrated NaCl aqueous solution. This study shows that the presence of the air bubbles on the surface of the superhydrophobic membrane in a direct contact membrane distillation setup inhibited the occurrence of wetting (~100% salt rejection) even for high concentrations of the surface-active species (up to 0.8 mM SDS) in the feed solution while no undesirable influence on the permeate flux was observed. Introducing air into the feed side of the membrane displaces the liquid which partly tends to penetrate the macroporous structure with air bubbles and therefore increases the liquid entry pressure, and in addition, the simultaneous use of a superhydrophobic membrane enhances the solution contact angle.

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“…He et al (2011) and Adham et al (2013) have worked on MD processes and found that the conductivity of the distillates produced were in range of 1-3 µS/cm. Gryta (2015) have shown that when analyzing the distillate of a DCMD process that was used for tap water desalination, the salt rejection was almost 100% and the electrical conductivity was in range of 2-3 µS/cm. Kullab & Martin (2011) have studied MD-based water treatment using a pilot plant operated with waste heat from a cogeneration facility in Sweden.…”

Section: 12-water Qualitymentioning

confidence: 99%

“…These include hydroxides, phosphates, nitric acid, and phosphoric acid among others. The cleaning process should get rid of the deposits and restore the membrane's normal capacity and separation characteristics Gryta (2015). has shown that rinsing the MD module used for tap water desalination with diluted HCl solutions resulted in removing the CaCO 3 deposits formed on the membrane and the flux was maintained.…”

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confidence: 99%

An Investigation into Hydrophobic Membrane Fouling in Desalination Using Membrane Distillation Technology

Al-Obaidli

2016

Qatar Foundation Annual Research Conference Proceedings Volume 2016 Issue 1

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Water desalination using membrane distillation with acidic stabilization of scaling layer thickness

Cited by 21 publications

References 29 publications

Fouling and wetting in the membrane distillation driven wastewater reclamation process – A review

Fouling and wetting in the membrane distillation driven wastewater reclamation process – A review

Wetting prevention in membrane distillation through superhydrophobicity and recharging an air layer on the membrane surface

An Investigation into Hydrophobic Membrane Fouling in Desalination Using Membrane Distillation Technology

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