Investigation of parameters affecting the ultrafiltration of oil-in-water emulsion wastewater

Kiss, Z.; Kertész, Szabolcs; Beszédes, Sándor; Hodúr, Cecília; László, Zsuzsanna

doi:10.1080/19443994.2013.795323

Cited by 10 publications

(6 citation statements)

References 17 publications

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“…In turn, with regards to the impact of temperature on the process performance, it should be noted that, generally, the viscosity of the solution decreases with the temperature [ 31 , 32 ], hence, according to Darcy’s law (Equation (3)) increasing the feed temperature T F from 298 to 308 K resulted in an increase in the permeate flux. Importantly, this result substantiates previous findings in the literature [ 33 , 34 , 35 , 36 ] wherein it has been shown that during the UF of oil-in-water emulsion, the temperature has a significant influence on the permeate flux. Worthy of note, the reduced oil viscosity facilitated its penetration through the membranes pore and, as a result, its retention degree at 308 K slightly decreased.…”

Section: Resultssupporting

confidence: 92%

Long-Term Performance of Ultrafiltration Membranes: Corrosion Fouling Aspect

Tomczak

Gryta

2023

Materials

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The past decade has seen a rise in the importance of the ultrafiltration (UF) technique in the separation of various complex solutions. However, the fouling phenomenon is the main limitation to faster process development. To the best of the authors’ knowledge, the present paper is the first to aim to identify the role of corrosion fouling in long-term UF. For this purpose, polyvinylidene fluoride (PVDF) and polyethersulfone (PES) membranes were used. The investigations were carried out with the use of both pilot-scale and laboratory-scale units. Results obtained in the present study have clearly demonstrated that the oil concentration has a significant impact on the process performance. Indeed, it has been noted that a reduction in oil concentration from 160 to 100 mg/L resulted in an increase in the PVDF membrane flux from 57 to 77 L/m2h. In addition, it has been shown that the feed temperature has a significant influence on the UF performance. Importantly, it has been shown that corrosion fouling is of vital importance in UF membranes. Indeed, corrosion products such as iron oxides contaminated the membrane surface leading to an irreversible decrease in the UF process performance. In addition, it has been found that repeating the chemical cleaning of the membrane units significantly reduced the intensity of the fouling phenomenon. However, the complete elimination of its effects was not achieved. Therefore, it has been indicated that cleaning agents recommended by membrane manufacturers do not remove corrosion products deposited on the membrane surface. Undoubtedly, the obtained results can be used in the design of UF units leading to the extension of membrane installation lifetime.

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Section: Resultssupporting

confidence: 92%

Long-Term Performance of Ultrafiltration Membranes: Corrosion Fouling Aspect

Tomczak

Gryta

2023

Materials

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“…The major membranes for the separation of water and oil are microfiltration (MF) and ultrafiltration (UF) 14,15 . Earlier studies have shown that the fundamental parameters of oil droplet filtration are the membrane form (a higher flow of hydrophilic membrane), oil concentration, and flow velocity 16 . Maximum permeate flow and maximum oil rejection are the main criteria for optimizing the membrane processes 17 .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Electrospun Nanofibers Membrane for Emulsified Oil Removal from Oily Wastewater

Alkarbouly

Waisi

2022

Baghdad Sci.J

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The electrospun nanofibers membranes have gained considerable interest in water filtration applications. In this work, the fabrication and characterization of the electrospun polyacrylonitrile-based nonwoven nanofibers membrane are reported. Then, the membrane's performance and antifouling properties were evaluated in removing emulsified oil using a cross flow filtration system. The membranes were fabricated with different polyacrylonitrile (PAN) concentrations (8, 11, and 14 wt. %) in N, N-Dimethylformamide (DMF) solvent resulted in various average fiber sizes, porosity, contact angle, permeability, oil rejection, and antifouling properties. Analyses of surface morphology of the fabricated membranes before and after oil removal revealed increasing the fiber size, decreasing the fouling amount, and increasing the permeate flux. On the other hand, decreasing the fiber size resulting in increases the oil rejection. It was observed that 11 wt. % PAN based nonwoven nanofiber membrane was the optimum membrane for emulsified oil removal due to its good porosity, permeability with good oil rejection. In addition, fouled nonwoven nanofiber membrane cleaning was done by backwashing technique using warm distilled water which was effective in retaining the membrane permeability and oil rejection for 7 times. The obtained results confirmed an efficient performance of the fabricated nanofibers membrane for oil-water separation with oil rejection percentage of 92.5% and a permeate flux of 120 LMH.

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“…Ultrafiltration membranes, from both natural and synthetic polymers, were used for the removal of oil from oil-in-water emulsions. Regenerated cellulose and cellulose derivatives were studied for making membranes to remove different types of oils from oil-in-water emulsions [ 17 , 18 , 19 , 20 ]. Recently, cellulose nanofibers were used as ultra-thin films membranes for the same purpose [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Use of Bacterial Cellulose and Crosslinked Cellulose Nanofibers Membranes for Removal of Oil from Oil-in-Water Emulsions

Hassan

Abou-Zeid

et al. 2017

Polymers

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Never-dried bacterial cellulose (BC) and crosslinked cellulose nanofibers (CNF) were used for the removal of oil from stabilized and non-stabilized oil-in-water emulsions with droplet sizes less than 1 µm. The CNF membranes were exchanged with isopropyl alcohol before drying. The microscopic structure of the prepared membranes was evaluated using scanning electron microscopy (SEM); the water flux and the rejection of oil were evaluated using a dead-end filtration cell. BC harvested after different incubation time periods (2 to 10 days) did not show a change in the width of the nanofibers, but only the thickness of the membranes was increased. Pure water flux was not affected as a result of increasing thicknesses of BC membranes harvested after 4-10 days while BC harvested after two days had significantly higher water flux than the others. BC showed a higher flux and efficiency in removing oil from oil emulsions than CNF membranes. Removal of oil by the different membranes from the non-stabilized oil emulsion was more efficient than from the stabilized one.

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Investigation of parameters affecting the ultrafiltration of oil-in-water emulsion wastewater

Cited by 10 publications

References 17 publications

Long-Term Performance of Ultrafiltration Membranes: Corrosion Fouling Aspect

Long-Term Performance of Ultrafiltration Membranes: Corrosion Fouling Aspect

Fabrication of Electrospun Nanofibers Membrane for Emulsified Oil Removal from Oily Wastewater

Use of Bacterial Cellulose and Crosslinked Cellulose Nanofibers Membranes for Removal of Oil from Oil-in-Water Emulsions

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