Effect of particle shape on crossflow filtration flux

Connell, HJ; Zhu, Jesse; Bassi, Amarjeet

doi:10.1016/s0376-7388(98)00250-6

Cited by 19 publications

(12 citation statements)

References 21 publications

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“…Connell et al [14] demonstrated that particle shapes influence the permeate fluxes through the structure of the cake layer formed. Highly irregular shaped particles such as "branched" particles enabled them to bridge far apart and provide high cake voidage.…”

Section: Discussionmentioning

confidence: 99%

Influence of oil conditioning on the permeate flux and cake properties during microfiltration of lampante olive oil

Hafidi

Pioch

Teyssier

et al. 2004

Euro J Lipid Sci & Tech

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This work studies the deacidification of lampante virgin olive oil (acidity ranging from 2.15-4.65%) by microfiltration through alumina membrane. The effects of (i) the amount of absorbed water during the neutralization of the free fatty acids with various NaOH concentrations, and (ii) the acid pre-treatment with phosphoric acid on permeate fluxes during microfiltration were studied. Physical properties of the cake (specific resistance and compressibility) were also investigated. The soap molecules are known to self assemble and form multilamellar vesicles with hundreds of bilayers entrapping water molecules between the polar groups. Swelling and deformability of such structures must be influenced by the amount of solubilized water. Our results show for all tested oils that a dilute NaOH solution (20%) allows the highest flux through the membrane, i.e. about 3-fold the flux resulting from 40%-NaOH treatment. The improvement of the initial fluxes reached approximately 300% in comparison with those obtained with more concentrated NaOH solutions, whereas the use of a more diluted solution (10% NaOH) caused a loss of separation efficiency. The addition of 0.1% (wt/wt) of phosphoric acid prior to neutralization results in further flux improvement especially at the beginning of filtration. The initial fluxes doubled when passing from 0-0.05% H 3 PO 4 and then, in case of 20% NaOH to 0.1%. The average cake-specific resistance was the highest in the case of neutralization with 30% NaOH and the lowest when coupling 0.1% H 3 PO 4 pre-treatment with 20% NaOH neutralization. In the latter case the cake showed a highly compressible behavior.

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Section: Discussionmentioning

confidence: 99%

Influence of oil conditioning on the permeate flux and cake properties during microfiltration of lampante olive oil

Hafidi

Pioch

Teyssier

et al. 2004

Euro J Lipid Sci & Tech

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“…When compared with laminar flow condition, increased crossflow velocity resulted in higher steady state flux. It was because high crossflow velocity sweeps away more effectively the cake deposited on the membrane and maintains a relatively higher flux [22]. Fig.…”

Section: Effects Of Filtration Pressure and Crossflow Velocitymentioning

confidence: 99%

“…The higher value of specific cake resistance and cake mass per unit filtration area under laminar flow condition than that under turbulent flow condition indicated that higher amount of and more compact cake was deposited on the membrane surface under laminar flow condition. The decrease of specific cake resistance was related to the fact that pressure drop across the filter cake increases as the crossflow velocity increases [22]. The decrease of cake mass might be caused by high crossflow velocity that reduced the amount of particles attached on the membrane surface.…”

Section: Effects Of Filtration Pressure and Crossflow Velocitymentioning

confidence: 99%

Removal of phosphate and fluoride from wastewater by a hybrid precipitation–microfiltration process

Liu

2010

Separation and Purification Technology

132

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“…In all these steps, the size and shape of the particles are of key importance. For example, during filtration process one should avoid platelet shaped particles if cake resistance is an issue [5,6]; good powder flowability and high packing density would require compact, rather than needle shaped particles [7]. Further, in pharmaceutical processes, both crystal size and shape significantly affect the dissolution properties of the drug and hence its efficacy [8,9].…”

Section: Introduction To Microparticle Characterizationmentioning

confidence: 99%

“…5 shows the relative error in the measured real length for different out-of-plane tilts using superimposition and 3D point cloud algorithm. As can be seen fromFig.…”

mentioning

confidence: 99%

On-line monitoring of particulate processes using digital holography

Khanam¹

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Effect of particle shape on crossflow filtration flux

Cited by 19 publications

References 21 publications

Influence of oil conditioning on the permeate flux and cake properties during microfiltration of lampante olive oil

Influence of oil conditioning on the permeate flux and cake properties during microfiltration of lampante olive oil

Removal of phosphate and fluoride from wastewater by a hybrid precipitation–microfiltration process

On-line monitoring of particulate processes using digital holography

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