scholarly journals Influence of Surface Properties of Filtration-Layer Metal Oxide on Ceramic Membrane Fouling during Ultrafiltration of Oil/Water Emulsion

2016 ◽  
Vol 50 (9) ◽  
pp. 4668-4674 ◽  
Author(s):  
Dongwei Lu ◽  
Tao Zhang ◽  
Leo Gutierrez ◽  
Jun Ma ◽  
Jean-Philippe Croué
Keyword(s):  
Metal Oxide ◽  
Surface Properties ◽  
Membrane Fouling ◽  
Ceramic Membrane ◽  
Water Emulsion ◽  
Oil Water

scholarly journals Development of Red Clay Ultrafiltration Membranes for Oil-Water Separation

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 248
Author(s):  
Saad A. Aljlil
Keyword(s):  
Ceramic Membrane ◽  
Applied Pressure ◽  
Operating Pressure ◽  
Permeate Flux ◽  
Carbon Membrane ◽  
Red Clay ◽  
Water Separation ◽  
Water Emulsion ◽  
Cross Flow Filtration ◽  
Oil Water

In this study, a red clay/nano-activated carbon membrane was investigated for the removal of oil from industrial wastewater. The sintering temperature was minimized using CaF2 powder as a binder. The fabricated membrane was characterized by its mechanical properties, average pore size, and hydrophilicity. A contact angle of 67.3° and membrane spore size of 95.46 nm were obtained. The prepared membrane was tested by a cross-flow filtration process using an oil-water emulsion, and showed a promising permeate flux and oil rejection results. During the separation of oil from water, the flux increased from 191.38 to 284.99 L/m2 on increasing the applied pressure from 3 to 6 bar. In addition, high water permeability was obtained for the fabricated membrane at low operating pressure. However, the membrane flux decreased from 490.28 to 367.32 L/m2·h due to oil deposition on the membrane surface; regardless, the maximum oil rejection was 99.96% at an oil concentration of 80 NTU and a pressure of 5 bar. The fabricated membrane was negatively charged, as were the oil droplets, thereby facilitating membrane purification through backwashing. The obtained ceramic membrane functioned well as a hydrophilic membrane and showed potential for use in oil wastewater treatment.

scholarly journals Hydrophilic Fe2O3 dynamic membrane mitigating fouling of support ceramic membrane in ultrafiltration of oil/water emulsion

2016 ◽  
Vol 165 ◽  
pp. 1-9 ◽  
Author(s):  
Dongwei Lu ◽  
Wei Cheng ◽  
Tao Zhang ◽  
Xinglin Lu ◽  
Qianliang Liu ◽  
...  
Keyword(s):  
Ceramic Membrane ◽  
Dynamic Membrane ◽  
Water Emulsion ◽  
Oil Water

scholarly journals Development of Polysulfone Membrane via Vapor-Induced Phase Separation for Oil/Water Emulsion Filtration

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2519
Author(s):  
Nafiu Umar Barambu ◽  
Muhammad Roil Bilad ◽  
Mohamad Azmi Bustam ◽  
Nurul Huda ◽  
Juhana Jaafar ◽  
...  
Keyword(s):  
Phase Separation ◽  
Surface Chemistry ◽  
Exposure Time ◽  
Membrane Fouling ◽  
Membrane Structure ◽  
Membrane Surface ◽  
Hydrophobic Membrane ◽  
Polysulfone Membrane ◽  
Water Emulsion ◽  
Oil Water

The discharge of improperly treated oil/water emulsion by industries imposes detrimental effects on human health and the environment. The membrane process is a promising technology for oil/water emulsion treatment. However, it faces the challenge of being maintaining due to membrane fouling. It occurs as a result of the strong interaction between the hydrophobic oil droplets and the hydrophobic membrane surface. This issue has attracted research interest in developing the membrane material that possesses high hydraulic and fouling resistance performances. This research explores the vapor-induced phase separation (VIPS) method for the fabrication of a hydrophilic polysulfone (PSF) membrane with the presence of polyethylene glycol (PEG) as the additive for the treatment of oil/water emulsion. Results show that the slow nonsolvent intake in VIPS greatly influences the resulting membrane structure that allows the higher retention of the additive within the membrane matrix. By extending the exposure time of the cast film under humid air, both surface chemistry and morphology of the resulting membrane can be enhanced. By extending the exposure time from 0 to 60 s, the water contact angle decreases from 70.28 ± 0.61° to 57.72 ± 0.61°, and the clean water permeability increases from 328.70 ± 8.27 to 501.89 ± 8.92 (L·m−2·h−1·bar−1). Moreover, the oil rejection also improves from 85.06 ± 1.6 to 98.48 ± 1.2%. The membrane structure was transformed from a porous top layer with a finger-like macrovoid sub-structure to a relatively thick top layer with a sponge-like macrovoid-free sub-structure. Overall results demonstrate the potential of the VIPS process to enhance both surface chemistry and morphology of the PSF membrane.

A wavy flow channel system for membrane fouling control in oil/water emulsion filtration

2021 ◽  
Vol 44 ◽  
pp. 102340
Author(s):  
Nafiu Umar Barambu ◽  
Muhammad Roil Bilad ◽  
Afiq Mohd Laziz ◽  
Nik Abdul Hadi Md Nordin ◽  
Mohamad Azmi Bustam ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Flow Channel ◽  
Channel System ◽  
Water Emulsion ◽  
Fouling Control ◽  
Oil Water ◽  
Emulsion Filtration

scholarly journals Development of Polyvinylidene Fluoride Membrane via Assembly of Tannic Acid and Polyvinylpyrrolidone for Filtration of Oil/Water Emulsion

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 976
Author(s):  
Normi Izati Mat Nawi ◽  
Syasya Ong Amat ◽  
Muhammad Roil Bilad ◽  
Nik Abdul Hadi Md Nordin ◽  
Norazanita Shamsuddin ◽  
...  
Keyword(s):  
Tannic Acid ◽  
Membrane Fouling ◽  
Polyvinylidene Fluoride ◽  
Ecological Impact ◽  
Mean Flow ◽  
Water Emulsion ◽  
Emulsion Separation ◽  
Oil Water ◽  
The Impact ◽  
Enhanced Surface

Wastewater containing oil/water emulsion has a serious ecological impact and threatens human health. The impact worsens as its volume increases. Oil/water emulsion needs to be treated before it is discharged or reused again for processing. A membrane-based process is considered attractive in effectively treating oil/water emulsion, but progress has been dampened by the membrane fouling issue. The objective of this study is to develop polyvinylidene fluoride (PVDF) membranes customized for oil/water emulsion separation by incorporating assembly of tannic acid (TA) and polyvinylpyrrolidone (PVP) in the polymer matrix. The results show that the assembly of TA/PVP complexation was achieved as observed from the change in colour during the phase inversion and as also proven from the characterization analyses. Incorporation of the TA/PVP assembly leads to enhanced surface hydrophilicity by lowering the contact angle from 82° to 47°. In situ assembly of the TA/PVP complex also leads to enhanced clean water permeability by a factor of four as a result of enhanced mean flow pore size from 0.2 to 0.9 µm. Owing to enhanced surface chemistry and structural advantages, the optimum hydrophilic PVDF/TA/PVP membrane poses permeability of 540.18 L/(m2 h bar) for oil/water emulsion filtration, three times higher than the pristine PVDF membrane used as the reference.

Anti-fouling graphene oxide based nanocomposites membrane for oil-water emulsion separation

2017 ◽  
Vol 77 (5) ◽  
pp. 1179-1185 ◽  
Author(s):  
Yang Feng ◽  
Zhiwen Wang ◽  
Ruixue Zhang ◽  
Yuanyuan Lu ◽  
Yuqing Huang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Membrane Fouling ◽  
Self Assembly ◽  
High Efficiency ◽  
Rejection Rate ◽  
Contact Angles ◽  
Water Contact ◽  
Water Emulsion ◽  
Emulsion Separation ◽  
Oil Water

Abstract Anti-fouling copper hydroxide nanowires (CHNs)-graphene oxide (GO) nanocomposites membrane was fabricated by a vacuum-assisted filtration self-assembly process. CHNs were covered on the surface and inserted into the interlayers of the GO nanosheets to form the rough surface and nanostructure channels. The membrane with water contact angles (CAs) of 53° and oil CAs of 155° exhibited superior stability, hydrophilicity, underwater superoleophobicity and ultralow oil adhesion, and hence it could separate the oil-water emulsion with a high efficiency of >99%. This membrane showed the combined advantages of high oil rejection rate and ultralow membrane fouling, making it promising for practical oil-water emulsion separation applications.

scholarly journals Membrane surface properties and their effects on real waste oil-in-water emulsion ultrafiltration

Water SA ◽  
2019 ◽  
Vol 45 (3 July) ◽  
Author(s):  
Marjana Simonič
Keyword(s):  
Surface Properties ◽  
Membrane Fouling ◽  
Membrane Surface ◽  
Cross Flow ◽  
Influential Factors ◽  
Permeate Flux ◽  
Chemical Cleaning ◽  
Water Emulsion ◽  
Oil In Water ◽  
Oil In Water Emulsion

Membrane surface properties and their effect on the efficiency of ultrafiltration (UF) of real waste oily emulsions was studied. Experiments were performed in cross-flow operation at total recycle condition in a lab-scale system. The ceramic UF membrane in the tubular type module was employed. During the experiments permeate flux was measured. The most important influential factors, such as temperature, TMP, and pH, were considered during the experiments. Zeta potential was measured in order to explain the phenomena on the membrane surface. The isoelectric point of the fouled membrane was shifted to the alkaline range. COD removal efficiency reached 89%. Gas chromatography measurements were performed in order to determine the composition of waste emulsions. SEM micrographs showed the formation of calcite on the membrane, which contributed to membrane fouling. Chemical cleaning was examined using alkaline and acid solutions, and a cleaning strategy was determined.

scholarly journals Polyvinylidene Fluoride Membrane Via Vapour Induced Phase Separation for Oil/Water Emulsion Filtration

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 427
Author(s):  
Normi Izati Mat Nawi ◽  
Nur Rifqah Sait ◽  
Muhammad Roil Bilad ◽  
Norazanita Shamsuddin ◽  
Juhana Jaafar ◽  
...  
Keyword(s):  
Phase Separation ◽  
Pore Size ◽  
Water Permeability ◽  
Membrane Fouling ◽  
Polyvinylidene Fluoride ◽  
Clean Water ◽  
Mean Flow ◽  
Water Emulsion ◽  
Oil Water ◽  
Emulsion Filtration

Membrane-based technology is an attractive option for the treatment of oily wastewater because of its high oil removal efficiency, small footprint and operational simplicity. However, filtration performance is highly restricted by membrane fouling, especially when treating oil/water emulsion as a result of strong interaction between oil droplets and the hydrophobic property of the membrane. This study explores the fabrication of polyvinylidene fluoride (PVDF)-based membrane via the vapour induced phase separation (VIPS) method while incorporating polyvinyl pyrrolidone (PVP) as a hydrophilic additive to encounter membrane fouling issues and improve membrane filterability. The resulting membranes were characterized and tested for oil/water emulsion filtration to evaluate their hydraulic, rejection and anti-fouling properties. Results show that the changes in membrane morphology and structure from typical macrovoids with finger-like substructure to cellular structure and larger membrane pore size were observed by the prolonged exposure time from 0 to 30 min through the VIPS method. The enhanced clean water permeability is attributed to the addition of PVP–LiCl in the dope solution that enlarges the mean flow pore size from 0.210 ± 0.1 to 7.709 ± 3.5 µm. The best performing membrane was the VIPS membrane with an exposure time of 5 min (M-5), showing oil/water emulsion permeability of 187 Lm−2 h−1 bar−1 and oil rejection of 91.3% as well as an elevation of 84% of clean water permeability compared to pristine PVDF developed using a typical non-solvent induced phase separation (NIPS) method. Despite the relatively high total fouling, M-5 was able to maintain its high permeability by water flushing as a simple operation for membrane fouling control. The performance was achieved thanks to combination of the large mean flow pore size and hydrophilic property from residual PVP in the membarne matrix. Overall, the results demonstrate the potential of the optimum VIPS method in the presence of PVP and LiCl additives for oil/water emulsion treatment.

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