Investigations of inorganic and organic fouling behaviors, antifouling and cleaning strategies for pressure retarded osmosis (PRO) membrane using seawater desalination brine and wastewater

Han, Gang; Zhou, Jie; Wan, Chunfeng; Yang, Tianshi; Chung, Tai‐Shung

doi:10.1016/j.watres.2016.07.040

Cited by 67 publications

(23 citation statements)

References 44 publications

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“…The high-flux membrane samples such as THF-2 and CFS cause high fouling potential compared to those of low-flux samples (THF-3 and CHF). In addition, poor ion selectivity of the membrane samples (THF-3 and CFS) may cause the acceleration of colloidal fouling on the membrane surface due to the electrostatic attraction between penetrated ions and charged foulants [41,42]. These results, therefore, clearly indicate that the THF-2 membrane sample possesses lower fouling potential among all the membrane samples, even though its water flux was significantly higher.…”

Section: Fouling and Cleaning Of The Flat Sheet And Hollow Fiber Tfc Membranes Under Fo Operationmentioning

confidence: 87%

Defect-free outer-selective hollow fiber thin-film composite membranes for forward osmosis applications

Lim

Tran

Akther

et al. 2019

Journal of Membrane Science

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This study presents the successful fabrication of a novel defect-free outer-selective hollow fiber (OSHF) thin-film composite (TFC) membrane for forward osmosis (FO) applications. Thin and porous FO membrane substrates made of polyether sulfone (PES) with a dense and smooth outer surface were initially fabricated at different air-gap distances. A modified vacuum-assisted interfacial polymerisation (VAIP) technique was then successfully utilised for coating polyamide (PA) layer on the hollow fiber (HF) membrane substrate to prepare OSHF TFC membranes.Experimental results showed that the molecular weight cut-off (MWCO) of the surface of the membrane substrate should be less than 88 kDa with smooth surface roughness to obtain a defectfree PA layer via VAIP. The FO test results showed that the newly developed OSHF TFC membranes achieved water flux of 30.2 L m -2 h -1 and a specific reverse solute flux of 0.13 g L -1 using 1M NaCl and DI water as draw and feed solution, respectively. This is a significant improvement on commercial FO membranes. Moreover, this OSHF TFC FO membrane demonstrated higher fouling resistance and better cleaning efficiency against alginate-silica fouling. This membrane also has a strong potential for scale-up for use in larger applications. It also has strong promise for various FO applications such as osmotic membrane bioreactor (OMBR) and fertiliser-drawn OMBR processes.

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Section: Fouling and Cleaning Of The Flat Sheet And Hollow Fiber Tfc Membranes Under Fo Operationmentioning

confidence: 87%

Defect-free outer-selective hollow fiber thin-film composite membranes for forward osmosis applications

Lim

Tran

Akther

et al. 2019

Journal of Membrane Science

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“…For surface crystallization, the crystals are formed on the membrane surface, while the scale formation occurs through the lateral crystal growth [19]. Inorganic fouling can be influenced by several parameters, including degree of super saturation, shear across the membrane, transmembrane pressure, membrane surface roughness, and the feed solution chemistry [20]. Membranes that have rougher surfaces are more susceptible to inorganic fouling than those featuring smoother surfaces.…”

Section: Inorganic Foulingmentioning

confidence: 99%

Ultrasound for Membrane Fouling Control in Wastewater Treatment and Protein Purification Downstream Processing Applications

Abdelrasoul¹,

Doan²

2020

Advances in Membrane Technologies

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Membrane fouling is one of the major issues encountered in membrane filtration including microfiltration, ultrafiltration, nanofiltration, and reverse osmosis. Membrane fouling can occur due to the reversible and irreversible deposition of particles, colloids, macromolecules, salts, and other types of elements. As a consequence, fouling causes a significant decrease in the permeate flux due to plugging of membrane pores, and adsorption of fouling material on the membrane's surface and/or in the pore walls. A lot of research efforts have been directed towards fouling remediation techniques or membrane cleaning alternatives. Although most of these methods are relatively functional, they have drawbacks and limitations. Among these methods, the use of ultrasound has been shown to be effective in enhancing mass transfer, cleaning, disinfection, and controlling fouling. In membrane filtration processes, ultrasound can help accelerating the permeate flux towards the membrane and decreasing the concentration of solutes accumulated in the membrane pores and on the membrane surfaces. Ultrasonic fouling control does not require chemical cleaning and can maintain a high permeate flux throughout the filtration process. In addition, wastewater contaminants can be degraded by ultrasound. Therefore, ultrasound creates unique physicochemical conditions, which can be used as an effective tool for membrane fouling control. In this chapter, ultrasound radiation as a unique method to modify physical and chemical properties of a complex fluid with applications in wastewater treatment and protein purification process is highlighted. At first, ultrasonic parameters and how their ability to enhance the delivery of fluid flow to the membrane surface and affect the physical and chemical properties of foulants are discussed. Furthermore, various ultrasonic methods, including continuous and intermittent waves, and its influences on membrane fouling, permeate flux, membrane cleaning and flux recovery are reviewed. The main role of wave streaming as a driving force for fluid acceleration and antifouling control, and the impact of ultrasound-generated bubble cavitation on preventing and removing fouling deposits are described. The challenges of current ultrasonic techniques, which need to be addressed so as to facilitate their widespread and successful implementation, are explored. This chapter examines how the periodic compression/ rarefaction cycles of ultrasound can influence mass transfer and membrane fouling. Also, the current knowledge and approaches to advance ultrasonic technology as an Advances in Membrane Technologies 2 effective method for membrane fouling remediation in wastewater treatment and protein purification downstream processing are presented in this chapter.

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“…For this reason, a pressure, significantly bigger than the osmotic gradient of water, is needed [123]. Great hydraulic power is needed for the same cause [124]. This further elevates operating costs [125].…”

Section: Problems Arising In Ro Processmentioning

confidence: 99%

Short Communication: Requiring Reverse Osmosis Membranes Modifications – An Overview

Ghernaout¹

2017

AJCHE

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Do really reverse osmosis (RO) membranes need modification to cover their disadvantages or enhance their efficiency? Are there any defects in RO membranes manufacturing that require modification? These questions are discussed here in this short review. Through the world, there are thousands of patents, publications, and PhD theses dealing with surface modification and grafting of RO membranes. This growing phenomenon should attract the attention of the scientific community for technologic and economic reasons. Due to the increasing water pollution levels, which overpassed the RO membranes capacities, there is an urgent need to manufacture RO membranes, with multidisciplinary characteristics and high performance regarding both salts removal and fouling resistance, before sending them to the market and avoiding to think to their following modification.

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Investigations of inorganic and organic fouling behaviors, antifouling and cleaning strategies for pressure retarded osmosis (PRO) membrane using seawater desalination brine and wastewater

Cited by 67 publications

References 44 publications

Defect-free outer-selective hollow fiber thin-film composite membranes for forward osmosis applications

Defect-free outer-selective hollow fiber thin-film composite membranes for forward osmosis applications

Ultrasound for Membrane Fouling Control in Wastewater Treatment and Protein Purification Downstream Processing Applications

Short Communication: Requiring Reverse Osmosis Membranes Modifications – An Overview

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