Insights into the roles of membrane pore size and feed foulant concentration in ultrafiltration membrane fouling based on collision‐attachment theory

The experiment was carried out to investigate the influence of membrane pore size and hydrophobicity on the quality of clarified pineapple wine and fouling characteristics, using stirred cell dead–end microfiltration. The test membranes were mixed cellulose acetate (MCE, pore size 0.45 and 0.22 μm), modified polyvinylidene fluoride (MPVDF, 0.22 μm) and polyethersulfone (PESF, 0.22 μm). It was found that all types of membrane successfully clarified the pineapple wine. The membrane pore size and hydrophobicity played an importance role in membrane fouling, both reversible and irreversible. Regarding the permeate flux and fouling, 0.45 μm MCE was the most suitable for pineapple wine clarification. However, intensive organoleptic test with pilot scale would be needed.

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Effect of membrane pore size on the pH-sensitivity of polyethersulfone hollow fiber ultrafiltration membrane

Journal of Applied Polymer Science ◽

10.1002/app.34902 ◽

2011 ◽

Vol 123 (4) ◽

pp. 2320-2329 ◽

Cited By ~ 9

Author(s):

Lulu Li ◽

Tao Xiang ◽

Baihai Su ◽

Huijuan Li ◽

Bosi Qian ◽

...

Keyword(s):

Pore Size ◽

Hollow Fiber ◽

Ultrafiltration Membrane ◽

Ph Sensitivity ◽

Membrane Pore ◽

Membrane Pore Size

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A new design of microfiltration system and application to wastewater treatment

Water Science & Technology ◽

10.2166/wst.2000.0638 ◽

2000 ◽

Vol 41 (10-11) ◽

pp. 181-188

Author(s):

D.J. Chang ◽

S.H. Chen ◽

C.Y. Chang ◽

S.S. Lin ◽

J.S. Chang

Keyword(s):

Pore Size ◽

Membrane Fouling ◽

Cross Flow ◽

Reverse Direction ◽

Feed Concentration ◽

Force System ◽

Concentrated Suspension ◽

Membrane Pore ◽

Stock Tank ◽

Membrane Pore Size

A new microfiltration system with two sets of dead-end membrane cells and driven by a piston force system was designed in this study. In this system, suction of the filtrate was through the membrane in the reverse direction with a piston to backwash and reduce membrane fouling. In addition, after a few forward-reverse filtration cycles, the concentrated suspension of particles or solute on the retentate side was discharged into the stock tank under the cross flow condition. For maximizing the filtrate volume, it was found that the optimum times for forward and reverse filtration were 90 s and 3 s respectively, and the discharge frequency of retentate was 1 time per cycle. Moreover, it was also found that the filtrate volume increased with an increase in particle size and membrane pore size but decreased with an increase in feed concentration. Furthermore, an optimal filtrate volume existed on effecting the pressure drop. Finally, it could be used efficiently to treat and recycle the backwash wastewater from a rapid sand filter by a membrane with pore size of 0.1 and 0.22 μm.

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Flow and fouling in membrane filters: effects of membrane morphology

Journal of Fluid Mechanics ◽

10.1017/jfm.2017.102 ◽

2017 ◽

Vol 818 ◽

pp. 744-771 ◽

Cited By ~ 13

Author(s):

P. Sanaei ◽

L. J. Cummings

Keyword(s):

Pore Size ◽

Void Fraction ◽

Membrane Fouling ◽

Membrane Pore ◽

Membrane Filters ◽

Membrane Morphology ◽

Specific Morphology ◽

Fine Control ◽

Membrane Pore Size ◽

Optimum Filtration

Membrane filters are used extensively in microfiltration applications. The type of membrane used can vary widely depending on the particular application, but broadly speaking the requirements are to achieve fine control of separation, with low power consumption. The solution to this challenge might seem obvious: select the membrane with the largest pore size and void fraction consistent with the separation requirements. However, membrane fouling (an inevitable consequence of successful filtration) is a complicated process, which depends on many parameters other than membrane-pore size and void fraction; and which itself greatly affects the filtration process and membrane functionality. In this work we formulate mathematical models that can (i) account for the membrane internal morphology (internal structure, pore size and shape, etc.); (ii) describe fouling of membranes with specific morphology; and (iii) make some predictions as to what type of membrane morphology might offer optimum filtration performance.

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