A critical review of membrane modification techniques for fouling and biofouling control in pressure-driven membrane processes

Díez, Berta; Rosal, Roberto

doi:10.1007/s41204-020-00077-x

Cited by 68 publications

(30 citation statements)

References 175 publications

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“…The most common removal procedures involve hydraulic and pneumatic cleaning [123]. Biofilm formation is affected by several biological factors, including cell physiology, mechanical properties and physicochemical factors, such as hydrodynamic conditions and membrane morphology [50,122]. These elements impact the film structure, leading to uncommon fouling phenomena such as the formation of filamentous structures, termed streamers, downstream of the membrane pores [124].…”

Section: Biofoulingmentioning

confidence: 99%

Membrane Fouling Phenomena in Microfluidic Systems: From Technical Challenges to Scientific Opportunities

2021

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The almost ubiquitous, though undesired, deposition and accumulation of suspended/dissolved matter on solid surfaces, known as fouling, represents a crucial issue strongly affecting the efficiency and sustainability of micro-scale reactors. Fouling becomes even more detrimental for all the applications that require the use of membrane separation units. As a matter of fact, membrane technology is a key route towards process intensification, having the potential to replace conventional separation procedures, with significant energy savings and reduced environmental impact, in a broad range of applications, from water purification to food and pharmaceutical industries. Despite all the research efforts so far, fouling still represents an unsolved problem. The complex interplay of physical and chemical mechanisms governing its evolution is indeed yet to be fully unraveled and the role played by foulants’ properties or operating conditions is an area of active research where microfluidics can play a fundamental role. The aim of this review is to explore fouling through microfluidic systems, assessing the fundamental interactions involved and how microfluidics enables the comprehension of the mechanisms characterizing the process. The main mathematical models describing the fouling stages will also be reviewed and their limitations discussed. Finally, the principal dynamic investigation techniques in which microfluidics represents a key tool will be discussed, analyzing their employment to study fouling.

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Section: Biofoulingmentioning

confidence: 99%

Membrane Fouling Phenomena in Microfluidic Systems: From Technical Challenges to Scientific Opportunities

2021

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“…These membranes are either synthesized or result from structural modification of existing membranes. To develop the surface, permselectivity efficiency and ion exchange capacity (IEC) of any membrane, various preparation and modification techniques are applied, which include phase inversion, irradiation and film etching, microfabrication, film stretching, sintering of powders, track-etching, electro-deposition, sol-gel process and coating (dip coating, in situ polymerization, plasma polymerization, interfacial polymerization) [ 62 , 63 ]. However, surface engineering and modification is focused on the use of solvent-free technologies.…”

Section: Ion Exchange Membranes (Iem)mentioning

confidence: 99%

Donnan Membrane Process for the Selective Recovery and Removal of Target Metal Ions—A Mini Review

et al. 2021

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Membrane-based water purification technologies contribute significantly to water settings, where it is imperative to use low-cost energy sources to make the process economically and technically competitive for large-scale applications. Donnan membrane processes (DMPs) are driven by a potential gradient across an ion exchange membrane and have an advantage over fouling in conventional pressure driven membrane technologies, which are gaining attention. DMP is a removal, recovery and recycling technology that is commonly used for separation, purification and the concentrating of metals in different water and waste streams. In this study, the principle and application of DMP for sustainable wastewater treatment and prospects of chemical remediation are reviewed and discussed. In addition, the separation of dissolved metal ions in wastewater settings without the use of pressure driven gradients or external energy supply membrane technologies is highlighted. Furthermore, DMP distinctive configurations and operational factors are explored and the prospects of integrating them into the wastewater treatment plants are recommended.

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“…Membrane technology (MT) encompasses the related engineering and scientific approaches for the transport of components, species, or substances through or by membranes [44]. This technique is generally adopted to explain the mechanical processes for the separation of gas or liquid streams.…”

Section: Membrane Technologymentioning

confidence: 99%

“…This technique is generally adopted to explain the mechanical processes for the separation of gas or liquid streams. Membranes are classified as a thin layer barrier for size differential separation, which are usually integrated with chemical and biological treatments, or as a standalone system in secondary treatment of wastewater [44,45]. For a typical membrane mechanism, there is usually a driving force such as a semi-permeable barrier which controls the rate of movement of components by fractional permeation, and rejection through pores of different sizes as depicted in Figure 1.…”

Section: Membrane Technologymentioning

confidence: 99%

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Emerging Trends in Wastewater Treatment Technologies: The Current Perspective

Armah¹,

Chetty²,

Adedeji³

et al. 2021

Promising Techniques for Wastewater Treatment and Water Quality Assessment

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The quality of freshwater and its supply, particularly for domestic and industrial purposes are waning due to urbanization and inefficient conventional wastewater treatment (WWT) processes. For decades, conventional WWT processes have succeeded to some extent in treating effluents to meet standard discharge requirements. However, improvements in WWT are necessary to render treated wastewater for re-use in the industrial, agricultural, and domestic sectors. Three emerging technologies including membrane technology, microbial fuel cells and microalgae, as well as WWT strategies are discussed in this chapter. These applications are a promising alternative for manifold WWT processes and distribution systems in mitigating contaminants to meet acceptable limitations. The basic principles, types and applications, merits, and demerits of the aforementioned technologies are addressed in relation to their current limitations and future research needs. The development in WWT blueprints will augment the application of these emerging technologies for sustainable management and water conservation, with re-use strategies.

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A critical review of membrane modification techniques for fouling and biofouling control in pressure-driven membrane processes

Cited by 68 publications

References 175 publications

Membrane Fouling Phenomena in Microfluidic Systems: From Technical Challenges to Scientific Opportunities

Membrane Fouling Phenomena in Microfluidic Systems: From Technical Challenges to Scientific Opportunities

Donnan Membrane Process for the Selective Recovery and Removal of Target Metal Ions—A Mini Review

Emerging Trends in Wastewater Treatment Technologies: The Current Perspective

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