Dynamic microfiltration with a perforated disk for effective harvesting of microalgae

Kim, Kyochan; Jung, Joo-Young; Kwon, Jong-Hee; Yang, Ji‐Won

doi:10.1016/j.memsci.2014.10.027

Cited by 47 publications

(27 citation statements)

References 34 publications

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“…In this case, the shear stress exhibited a broad distribution (Table ). For example, Kim et al found that shear stress induced by a dynamic rotation disk ranged from 0 to 61 Pa at a rotation speed of 0–800 rpm, which was larger than that obtained using other methods (0–10 Pa) . Hughes et al , however, reported that the shear stress was only in the range 0.04–0.08 Pa .…”

Section: Methods Of Creating Shear Stress In the Membrane Systemmentioning

confidence: 94%

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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Section: Methods Of Creating Shear Stress In the Membrane Systemmentioning

confidence: 94%

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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“…A typical technique to generate flow fields as required is to apply a rotating module (e.g., straight-vane stirrer or perforated disk) near the membrane surface in filtration systems [15][16][17] . The hydrodynamic characteristics of stirred flows depend largely on the blade stirring speed.…”

Section: Resultsmentioning

confidence: 99%

“…The filtration performance is found to be intensively affected by the disk structure and rotation speed [16] . Kim et al have numerically studied the flow domain generated by perforated or unperforated disks in a dynamic filtration system to harvest microalgae, which is confirmed to generate high shear rates on the membrane comparing to the device with an unperforated disk [17] . Sarkar et al have designed a novel shear enhanced membrane module, which consists of a hollow basket with four radial arms and installs on the central shaft [18] .…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigations of Blade Shape Effects on the Flow Characteristics in a Stirred Dead-End Membrane Bioreactor

Hu¹,

X²,

Lei³

et al. 2018

Preprint

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Numerical simulations of turbulent flows in a stirred dead-end membrane bioreactor are performed by the RNG k-ε model based on finite volume method using Fluent codes. Comparisons of numerical and experimental results confirm the reliability and feasibility of the constructed model. Flow structures such as wake flows and circulation loops in stirred flows were well simulated. An increase of stirring speed is proposed to use to minimize the low velocity region. The single vane stirrer is found to be beneficial for biological separations. Results reveal that the increase of vane number can enhance the mixing effect in flow domains. However, a circular disk stirrer goes against the formation of vertical circulations. The six-vane stirrer is found to be able to provide a uniform distribution of high shear stress.

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“…module, R.V.F. Filtration, Paris, France) (Fillaudeau et al, 2007;Rayess et al, 2016;XIE et al, 2017), the DYNO filter (Bokela GmbH, Karlsruhe, Germany) (Bott et al, 2000) and the FMX (BKT United, Korea) filter (Kim et al, 2015).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Local hydrodynamics investigation within a dynamic filtration unit under laminar flow

Xie

Dietrich

Fillaudeau

et al. 2018

Chemical Engineering Research and Design

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Instantaneous wall shear stress is investigated in laminar flow in a dynamic filtration unit Mean wall shear stress distribution is deduced from vertical profiles of mean tangential velocity Organized motions induced by impeller rotation are reconstructed by P.O.D. analysis of P.I.V. data Root mean squared fluctuating wall shear stress distribution is estimated and shown to have the same order of magnitude as the mean wall shear stress.

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Dynamic microfiltration with a perforated disk for effective harvesting of microalgae

Cited by 47 publications

References 34 publications

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

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

Numerical Investigations of Blade Shape Effects on the Flow Characteristics in a Stirred Dead-End Membrane Bioreactor

Local hydrodynamics investigation within a dynamic filtration unit under laminar flow

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