Protein (BSA) fouling of reverse osmosis membranes: Implications for wastewater reclamation

Ang, Wui Seng; Elimelech, Menachem

doi:10.1016/j.memsci.2007.03.018

Cited by 339 publications

(272 citation statements)

References 43 publications

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“…As RO membrane is non-porous, the fouling behavior of BSA is different. BSA fouling of RO usually occurs on membrane surface, with the first step of depositing on the surface via foulant-surface interactions followed by BSA-BSA interactions, the latter of which could cause more BSA to deposit on membrane surface and finally resulted in serious membrane fouling if no action (e.g., cleaning) takes place (Ang and Elimelech, 2007). Furthermore, when other pollutants such as alginate exist together, BSA fouling could be intensified due to foulant-foulant interactions (Yu et al, 2012).…”

Section: Figmentioning

confidence: 99%

“…The frequency of particle collision and the attachment coefficient could decide the rate of colloidal aggregation, while the coefficient is the reflect of the energy barrier that results from the summation of the van der Waals force and the electrostatic interaction force . The cake layer formed by deposition of colloids on the membrane surface could lead to an additional hydraulic resistance and a serious concentration polarization, which could cause decrease of permeate flux and increase of operating pressure (Ang and Elimelech, 2007).…”

Section: Colloidal Foulingmentioning

confidence: 99%

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A review of reverse osmosis membrane fouling and control strategies

Jiang

Li²

2017

Science of The Total Environment

753

362

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Reverse osmosis (RO) membrane technology is one of the most important technologies for water treatment. However, membrane fouling is an inevitable issue. Membrane fouling leads to higher operating pressure, flux decline, frequent chemical cleaning and shorter membrane life. This paper reviews membrane fouling types and fouling control strategies, with a focus on the latest developments. The fundamentals of fouling are discussed in detail, including biofouling, organic fouling, inorganic fouling and colloidal fouling. Furthermore, fouling mitigation technologies are also discussed comprehensively. Pretreatment is widely used in practice to reduce the burden for the following RO operation while real time monitoring of RO has the advantage and potential of providing support for effective and efficient cleaning. Surface modification could slow down membrane fouling by changing surface properties such as surface smoothness and hydrophilicity, while novel membrane materials and synthesis processes build a promising future for the next generation of RO membranes with big advancements in fouling resistance. Especially in this review paper, statistical analysis is conducted where appropriate to reveal the research interests in RO fouling and control.Graphic Abstract

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Section: Figmentioning

confidence: 99%

Section: Colloidal Foulingmentioning

confidence: 99%

A review of reverse osmosis membrane fouling and control strategies

Jiang

Li²

2017

Science of The Total Environment

753

362

View full text Add to dashboard Cite

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“…Intrinisc water permeability, A, NaCl permeability coefficient, B, and salt rejection, R, of the fabricated membranes were evaluated in a laboratory-scale crossflow RO test unit [24], following the procedure described in our previous publication [20] …”

Section: Determination Of Membrane Active Layer Transport Properties mentioning

confidence: 99%

Relating performance of thin-film composite forward osmosis membranes to support layer formation and structure

Tiraferri¹,

Yip²,

Phillip³

et al. 2011

Journal of Membrane Science

575

404

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Osmotically-driven membrane processes have the potential to treat impaired water sources, desalinate sea/brackish waters, and sustainably produce energy. The development of a membrane tailored for these processes is essential to advancing the technology to the point that it is commercially viable. Here, a systematic investigation of the influence of thin-film composite membrane support layer structure on forward osmosis performance is conducted. The membranes consist of a selective polyamide active layer formed by interfacial polymerization on top of a polysulfone support layer fabricated by phase separation. By systematically varying the conditions used during the casting of the polysulfone layer, an array of support layers with differing structures were produced. The role that solvent quality, dope polymer concentration, fabric layer wetting, and casting blade gate height play in the support layer structure formation was investigated. Using a 1 M NaCl draw solution and a deionized water feed, water fluxes ranging from 4 to around 25 L m -2 h -1 with consistently high salt rejection (>95.5%) were produced. The relationship between membrane structure and performance was analyzed. This study confirms the hypothesis that the optimal forward osmosis membrane consists of a mixedstructure support layer, where a thin sponge-like layer sits on top of highly porous macrovoids.Both the active layer transport properties and the support layer structural characteristics need to be optimized in order to fabricate a high performance forward osmosis membrane.

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“…Factors that could influence membrane fouling are membrane surface properties (Combe and others 1999;Childress and Elimelech 2000;Herzberg and Elimelech 2007;Li and others 2007), physicochemical properties of feed (Li and Elimelech 2004;Ang and others 2006;Ang and Elimelech 2007;Tang and others 2007;Ang and Elimelech 2008), and operating conditions of the processing system (Seidel and Elimelech 2002;Tang and others 2007). Additionally, continuous development of biofilms along with the concentration of organics and inorganics may lead to rapid flux decline with an increase in pressure by 10% to 15%.…”

Section: The Process Of Membrane Fouling and Its Implicationsmentioning

confidence: 99%

Development and Control of Bacterial Biofilms on Dairy Processing Membranes

Anand

Singh

Avadhanula

et al. 2013

Comp Rev Food Sci Food Safe

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Membrane fouling is a major operational problem that leads to reduced membrane performance and premature replacement of membranes. Bacterial biofilms developed on reverse osmosis membranes can cause severe flux declines during whey processing. Various types of biological, physical, and chemical factors regulate the formation of biofilms. Extracellular polymeric substances produced by constitutive microflora provide an effective barrier for the embedded cells. Cultural and microscopic techniques also revealed the presence of biofilms with attached bacterial cells on membrane surfaces. Presence of biofilms, despite regular cleaning processes, reflects ineffectiveness of cleaning agents. Cleaning efficiency depends upon factors such as pH of the cleaning agent, temperature, pressure, cleaning agent dose, optimum cleaning time, and cross-flow velocity during cleaning. Among different cleaning agents, surfactants help to prevent bacterial attachment to surfaces by reducing the surface tension of water and interfacial tension between the layers. Enzymes mixed with surfactants and chelating agents can be used to penetrate the biofilm matrix formed by microbes. Recent studies have shown the role of quorum-sensing-based cell-to-cell signaling, which provides communication within bacterial cells to form a mature biofilm, and also the role of applying quorum inhibitors to prevent biofilm formation. Major cleaning applications are also summarized in Table 1.

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Protein (BSA) fouling of reverse osmosis membranes: Implications for wastewater reclamation

Cited by 339 publications

References 43 publications

A review of reverse osmosis membrane fouling and control strategies

A review of reverse osmosis membrane fouling and control strategies

Relating performance of thin-film composite forward osmosis membranes to support layer formation and structure

Development and Control of Bacterial Biofilms on Dairy Processing Membranes

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