Air sparging in ultrafiltration hollow fibers: relationship between flux enhancement, cake characteristics and hydrodynamic parameters

Cabassud, Corinne; Laborie, Stéphanie; Durand-Bourlier, L.; Laîné, J.M.

doi:10.1016/s0376-7388(00)00538-x

Cited by 150 publications

(84 citation statements)

References 10 publications

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“…Similar result was obtained with an alternative design equipment to increase turbulence and other type of membranes as well (Bellhouse et al 2001, Costigan et al 2002. The fouling of the membranes was possible to decrease at the introduction of gas into the liquid (Laboire et al 1998, Cabassud et al 2001, Cui and Wright, 1996. The introduction of a specific gasin this case air -directly into the fluid created a two-phase gas/liquid flow.…”

Section: Introductionsupporting

confidence: 57%

Analysis of the different filtration parameters of whey by tubular and vibratory filtration systems

Szélpál¹,

Kohány²,

Fogarassy³

et al. 2014

Anal. Tech. Szeged.

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The largest quantities of by-product of the dairy, namely whey comes from the cheese making. The whey proteins are used by the agriculture in animal nutrition, and by the human nutrition as well; dry soups, infant formulas and supplements. The aim of our experiments was the separation of the lipid fraction of whey. During the measurements 0.05 μm, 0.2 μm and 0.45 μm microfiltration membranes were used in vibrating membrane filtration equipment (VSEP) and in a laboratory tubular membrane module. During the microfiltration, analytical characteristics, the fouling and the retention values were examined. Using the VSEP and the tubular module made possible to compare the effect of vibration, the static mixer and/ the airflow on the separation parameters.

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Section: Introductionsupporting

confidence: 57%

Analysis of the different filtration parameters of whey by tubular and vibratory filtration systems

Szélpál¹,

Kohány²,

Fogarassy³

et al. 2014

Anal. Tech. Szeged.

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“…Yeo et al [202] [Yeo, 2017 #321] showed that aeration also influenced the biofilm growth. In addition, Cabassud et al [203] reported that bubbles seem to alter the structure of the cake or fouling layer such that the specific resistance is reduced. They based this conclusion on the observation that gas sparging applied to the MF of particles increased the fluxes significantly after a period of flux decline at the higher feed concentrations.…”

Section: Role Of Air Bubblesmentioning

confidence: 99%

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

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Abstract:The submerged membrane filtration concept is well-established for low-pressure microfiltration (MF) and ultrafiltration (UF) applications in the water industry, and has become a mainstream technology for surface-water treatment, pretreatment prior to reverse osmosis (RO), and membrane bioreactors (MBRs). Compared to submerged flat sheet (FS) membranes, submerged hollow fiber (HF) membranes are more common due to their advantages of higher packing density, the ability to induce movement by mechanisms such as bubbling, and the feasibility of backwashing. In view of the importance of submerged HF processes, this review aims to provide a comprehensive landscape of the current state-of-the-art systems, to serve as a guide for further improvements in submerged HF membranes and their applications. The topics covered include recent developments in submerged hollow fiber membrane systems, the challenges and developments in fouling-control methods, and treatment protocols for membrane permeability recovery. The highlighted research opportunities include optimizing the various means to manipulate the hydrodynamics for fouling mitigation, developing online monitoring devices, and extending the submerged HF concept beyond filtration.

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“…Injecting air on the feed side creates a shear force on the membrane surface as bubbles rise along the membrane (Cui et al, 2003, Cabassud et al, 2001, which enhance the backtransport of foulants from the membrane surface, thus preventing deposition (Cabussud et al, 2001, Ducom et al, 2002. In an air-sparged UF system, bubble size and frequency result in different shear stresses at the membrane surface which can impact hydrodynamics and mass transfer (Zhang et al, 2009) and therefore fouling (Chan et al, 2011).…”

Section: List Of Tablesmentioning

confidence: 99%

“…Air sparging creates shear force at the membrane surface as bubbles rise along the membrane (Cui et al, 2003, Cabassud et al, 2001). The air-sparging induced shear force helps keeping particles that are near the membrane in suspension and enhances particle back-transport from the membrane surface, thus preventing particle deposition and enhances permeate flux (Cabassud et al, 2001, Ducom et al, 2002. A study performed by De Souza et al, (2013) showed that air sparging dominated UF fouling control.…”

Section: Air Spargingmentioning

confidence: 99%

Ultrafiltration Fouling: Impact of Backwash Frequency and Air Sparging

Wray

Bérubé

2014

Separation Science and Technology

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A bench-scale study was performed to optimize backwash frequency and air sparging conditions during ultrafiltration (UF) of natural surface waters in order to maximize water production and minimize irreversible fouling as well as operating and maintenance costs. Surface shear stress representing different air sparging conditions (continuous coarse bubble, discontinuous coarse bubble, and large pulse bubble sparging) was applied in combination with various backwash frequencies (0.5, 2 and 6 h) and fouling was assessed. Results indicated that air sparging with discontinuous coarse bubbles or large pulse bubbles significantly reduced the irreversible fouling rate while providing cost savings when compared to the baseline condition, which assumed a 0.5 h-backwash frequency and no air sparging during filtration. Cost savings were more pronounced at lower backwash frequencies, due to value associated with extra water produced over longer filtration times and longer membrane life resulted from fewer recovery chemical cleans because of lower irreversible fouling.

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Air sparging in ultrafiltration hollow fibers: relationship between flux enhancement, cake characteristics and hydrodynamic parameters

Cited by 150 publications

References 10 publications

Analysis of the different filtration parameters of whey by tubular and vibratory filtration systems

Analysis of the different filtration parameters of whey by tubular and vibratory filtration systems

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

Ultrafiltration Fouling: Impact of Backwash Frequency and Air Sparging

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