Submerged hollow fibre membrane filtration with transverse and longitudinal vibrations

Tian, Li; Fane, Anthony G.

doi:10.1016/j.memsci.2013.12.042

Cited by 39 publications

(15 citation statements)

References 36 publications

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“…Low et al [222] found that the use of vibrations slowed the flux decline for the submerged HF system that they investigated, and that longitudinal oscillation outperforms rotational oscillation. Li et al [223] showed that vibration was more effective for a bentonite suspension compared to a washed yeast solution that may cause internal fouling; hence, vibration is more effective primarily for cake removal but not for the mitigation of internal fouling, which was corroborated by Kola et al [220]. It was also shown that transverse vibration decreases the fouling rate much more effectively than longitudinal vibration [223].…”

Section: Vibrationsmentioning

confidence: 94%

“…Li et al [223] showed that vibration was more effective for a bentonite suspension compared to a washed yeast solution that may cause internal fouling; hence, vibration is more effective primarily for cake removal but not for the mitigation of internal fouling, which was corroborated by Kola et al [220]. It was also shown that transverse vibration decreases the fouling rate much more effectively than longitudinal vibration [223]. Genkin et al [224] reported that adding transverse vibration to longitudinal vibration (by using chess-patterned vanes) resulted in an almost doubling of the critical fluxes at the same frequency; adding coagulants further elevated the critical flux of the vibrating system, although floc breakup at higher frequencies (namely, 10 Hz) tended to reduce the critical flux.…”

Section: Vibrationsmentioning

confidence: 99%

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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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Section: Vibrationsmentioning

confidence: 94%

Section: Vibrationsmentioning

confidence: 99%

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

et al. 2017

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“…Various methods can be employed to induce shear stress in the membrane system, including rotation, spacer, varied gas bubble, fluid dynamic gauging, turbulence promoter, and vibration . The estimated magnitude of shear stress on a membrane surface, summarised in Table , is in the range of 0–100 Pa under different conditions (i.e.…”

Section: Methods Of Creating Shear Stress In the Membrane Systemmentioning

confidence: 99%

Shear stress in a pressure-driven membrane system and its impact on membrane fouling from a hydrodynamic condition perspective: a review

Wang

Leslie

et al. 2016

J. Chem. Technol. Biotechnol

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Pressure‐driven membrane technology has gained increasing popularity in municipal/domestic and industrial wastewater treatment, desalination, and water reclamation. Careful manipulation of surface shear stress, which plays a vital role in membrane fouling control from a purely hydrodynamic perspective, can minimise concentration polarisation of solute on flat sheet membranes, or enhance the particle back transport from hollow fibre membranes. This review considers the techniques to generate turbulence and shear at the membrane surface, the magnitude of shear stress, and the experimental, as well as numerical methods for evaluation of shear stress. The findings are presented in terms of the amount of shear stress reported to control membrane fouling in these systems. Operational disadvantages of fouling control via application of shear stress occur while changing the properties of the solute or particles, such as cell breakup, bacterial population change, or shear stress classification. The literature teaches that future developments on shear stress for membrane systems must be addressed, in addition to energy consumption, shear stress distribution and the development of combined analytical methods to characterise and visualise shear in situ for different membrane configurations. © 2016 Society of Chemical Industry

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“…Low frequency transverse vibration of the membrane module itself has been recently investigated as a means to control fouling in membrane bioreactors. Li et al found that a reduction in fouling occurred even at a vibration frequency of 1 Hz [24]. Fouling reduction was attributed to the ability to focus the shear forces directly onto the membrane surface, which is difficult to achieve when recirculating the bulk fluid [25].…”

Section: Introductionmentioning

confidence: 99%

Submerged membrane distillation for inland desalination applications

Meng

Hsu

et al. 2015

Desalination

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Submerged hollow fibre membrane filtration with transverse and longitudinal vibrations

Cited by 39 publications

References 36 publications

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

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

Shear stress in a pressure-driven membrane system and its impact on membrane fouling from a hydrodynamic condition perspective: a review

Submerged membrane distillation for inland desalination applications

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