Use of axial membrane vibrations to enhance mass transfer in a hollow tube oxygenator

Krantz, William B.; Bilodeau, Robert R.; Voorhees, Marc E.; Elgas, Roger J.

doi:10.1016/s0376-7388(96)00245-1

Cited by 38 publications

(35 citation statements)

References 12 publications

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“…Krantz et al [233] applied longitudinal vibrations to a bundle of silicon hollow tube membranes to enhance the mass transfer to the liquid on the lumen side of the membrane, and found that the mass-transfer coefficient was increased by a factor of 2.65 relative to that without vibrations. An analytical solution was developed for the velocity profile of the laminar flow within the vibrating tube.…”

Section: Vibrationsmentioning

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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Section: Vibrationsmentioning

confidence: 99%

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

et al. 2017

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“…Vibration enhances relative fluid motion and increases WSS at the membrane surface in a limited user space [27,28]. A high wall shear rate induced by mechanical vibration inhibits the development of secondary mass transfer resistances like concentration polarization and protein gel layer.…”

Section: Discussionmentioning

confidence: 99%

Enhancement of Solute Removal in a Hollow-Fiber Hemodialyzer by Mechanical Vibration

et al. 2011

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Better solute clearance, particularly of middle-molecular-weight solutes, has been associated with improved patient outcomes. However, blood-membrane interaction during dialysis results in the development of secondary mass transfer resistances on the dialyzer membrane surface. We discuss the potential effects of mechanical vibration on the diffusion, convection and adsorption of uremic solutes during dialysis. For sinusoidal and triangular vibratory motions, we conceptualized the hemodynamic changes inside the membrane and consequent effects on membrane morphology. Longitudinal vibration generates reverse flow by relative membrane motion, and transverse vibration generates a symmetric swirling flow inside the hollow fiber, which enhances wall shear stress and flow mixing. Moreover, the impulse induced by triangle wave vibration could provide higher absorption capacity to middle-molecular-weight solutes. Mechanical vibration could enhance solute removal by minimizing membrane morphology changes resulting from blood-membrane interaction during hemodialysis. These effects of mechanical vibration can be helpful in extracorporeal blood purification therapies including continuous, portable and wearable systems.

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“…Recently, several researchers have tried to broaden its applications in the food industry [88,89] or pervaporation process [90], and extend this concept to hollow fiber modules such as submerged membrane bioreactors [91][92][93][94]. Although the hollow fiber modules have higher potential for practical applications, there are only limited studies involving vibrating assisted hollow fiber modules [10,91,93,94] (a vibrating submerged hollow fiber module is shown in Fig. 18).…”

Section: Vibrating Membranesmentioning

confidence: 99%

“…This paper starts by summarizing the basic types of membrane module used for aqueous separations with a focus on hollow fiber modules and related mass transfer models. Then we discuss passive process enhancement techniques involving module/fiber configuration designs and active process enhancement techniques involving shear enhanced aids (vibrations/oscillation, bubbles and ultrasound etc) [10][11][12]. The focus is given to the latest developments in hollow fiber module design concepts and principles of mass transfer enhancement, because hollow fiber membrane technology is an attractive platform for many engineering processes.…”

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confidence: 99%

Membrane module design and dynamic shear-induced techniques to enhance liquid separation by hollow fiber modules: a review

Yang¹,

Wang²,

Fane³

et al. 2013

Desalination and Water Treatment

119

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Membrane-based separation processes have found numerous applications in various industries over the past decades. However, higher energy consumption, lower productivity and shorter membrane lifespan due to polarization and membrane fouling continue to present severe technical challenges to membrane-based separation. Improved membrane module design and novel hydrodynamics offer strategies to address these challenges.This review focuses on hollow fiber membrane modules which are well-suited to membrane contactor separation processes. Attempts to improve membrane module design should begin with a better understanding of the mass transfer in the hollow fiber module, therefore this review provides a summary of prior studies on the mass transfer models related to both the shell-side and tube-side fluid dynamics. Based on the mass transfer analysis, two types of technique to enhance hollow fiber membrane module performance are discussed: (1) passive enhancement techniques that involve the design and fabrication of effective modules with optimized flow geometry; or (2) active enhancement techniques that uses external energy to induce a high shear regime to suppress the undesirable fouling and concentration polarization phenomena. This review covers the progress over the past five years on the most commonly proposed techniques such as bubbling, vibrations and ultrasound.Both enhancement modes have their advantages and drawbacks. Generally, the passive enhancement techniques offer modest improvement of the system performance, while the active techniques, including bubbling, vibrating and ultrasound, are capable of providing as high as 315 times enhancement of the permeation flux. Fundamentally, the objectives of module design should include the minimization of the cost per amount of mass transferred (energy consumption 3 and module production cost) and the maximization of the system performance through optimizing the flow geometry and operating conditions of the module, scale-up potential and expansion of niche applications. It is expected that this review can provide inspiration for novel module development.

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Use of axial membrane vibrations to enhance mass transfer in a hollow tube oxygenator

Cited by 38 publications

References 12 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

Enhancement of Solute Removal in a Hollow-Fiber Hemodialyzer by Mechanical Vibration

Membrane module design and dynamic shear-induced techniques to enhance liquid separation by hollow fiber modules: a review

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