Effect of combination dope composition and evaporation time on the separation performance of cellulose acetate membrane for demak brackish water treatment

Produced water is the wastewater generated from the process of exploration in oil and gas production, which needs special treatment. A membrane with cellulose acetate is widely used for produced water treatment, but further developments and improvements are still required. Therefore, it is important to determine the factors of separation efficiency of an ultrathin cellulose acetate membrane by assessing the influence of the composition of the dope solution. The response surface methodology was employed to determine the optimal conditions for this application. The investigations were conducted by varying the cellulose acetate polymer concentration at 18-20 wt.%, polyethylene glycol 4000 at 2-3 wt.% and nonsolvent addition at 3-5 wt.%. The evaluation of membrane performance for the produced water treatment was performed in a dead-end filtration cell with permeate water flux and rejection parameters for turbidity, total dissolved solids, Ca2+, Mg2+ and sulfides of produced water upstream and downstream of the membrane. The optimal composition of the dope solution was: 19 wt.% of cellulose acetate, 3 wt.% of polyethylene glycol, and 5.67 wt.% of non-solvent.

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Effect of Solvent Evaporation Time and Casting Thickness on the Separation Performance of Cellulose Acetate Butyrate Blend Membrane

Journal of Applied Membrane Science & Technology ◽

10.11113/amst.v23n2.151 ◽

2019 ◽

Vol 23 (2) ◽

Cited By ~ 1

Author(s):

Darvin Manimaran ◽

Zeinab Abbas Jawad ◽

Chew Thiam Leng

Keyword(s):

Cellulose Acetate ◽

High Performance ◽

Solvent Evaporation ◽

Cellulose Acetate Butyrate ◽

Inversion Method ◽

Separation Performance ◽

Evaporation Time ◽

Wet Phase Inversion ◽

Carbon Dioxide Co2 ◽

Acetate Butyrate

Global warming and climate change due to greenhouse gases (GHGs) emission, mostly carbon dioxide (CO2), have induced global efforts to minimize the concentration of atmospheric CO2. To reduce the effects of this problem, membrane technology is selected for the separation of CO2 due to the energy efficiency and economic advantages exhibited. In this study, the chosen polymeric material, cellulose acetate butyrate (CAB) is optimized using a wet phase inversion method with various molecular weight and different casting conditions due to its outstanding film-forming specifications and capabilities of fabricating a defect-free layer of neat membrane. The membrane was synthesized by blending three different molecular weights (Mn) of 12,000, 30,000 and 70,000 at different casting thickness, 150 µm to 300 µm and solvent evaporation time of 3.5 to 5 min. The results of these predominant parameters were then utilized to determine a high performance CAB membrane suitable for an enhanced CO2/Nitrogen (N2) separation. Eventually, a high separation performance CAB membrane was successfully synthesized with a CO2/N2 selectivity of 1.5819 ± 0.0775 when the solvent evaporation time and casting thickness was optimized at 4.5 min and 300 µm, respectively. Through this study, an improved understanding between membrane casting conditions and membrane performance has been achieved, for future development and progress.

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Pengolahan Air Limbah Menjadi Air Minum Dengan Menghilangkan Amonium Dan Bakteri E-Coli Melalui Membran Nanofiltrasi

Walisongo Journal of Chemistry ◽

10.21580/wjc.v2i1.2668 ◽

2018 ◽

Vol 1 (1) ◽

pp. 6

Author(s):

Malikhatul Hidayah

Keyword(s):

Waste Water ◽

Wastewater Treatment ◽

Water Treatment ◽

Cellulose Acetate ◽

Solid Phase ◽

Inversion Method ◽

Cellulose Acetate Membrane ◽

Cellulose Acetate Membranes ◽

Treatment Research ◽

Non Fouling

Industrial waste water area that flows in the River Flood Canal Semarang can affect the environment if not done processing. Membrane is one alternative water treatment technologies with the principle of filtration. The presence of fouling is a problem encountered in the use of the membrane. In this study will be made of non-fouling nanofiltration membranes made from cellulose acetate. Manufacture of cellulose acetate membrane is accomplished by phase inversion method, which is changing the shape of the polymer solid phase into the liquid phase rich in solvent into solids (membrane) which is rich in polymer. Therefore, the aim of this study was to create a non-fouling nanofiltration membrane using cellulose acetate polymer as well as assess the effect of PEG additives and pre-treatment with UV light to the surface of the structure and performance of cellulose acetate membranes for produced water treatment. Research using cellulose acetate membranes for wastewater treatment is done by varying the type of PEG 1500 and 4000, variations of PEG of 1, 3 and 5% by weight and a UV irradiation for 10, 20 and 30 seconds. The research followed by testing the performance of the membrane in wastewater treatment using a dead-end filtration with the parameters of flux and rejection. Characterization of the membrane was analyzed with SEM and FTIR. Analysis of the results was conducted to determine the levels of turbidity, TDS, COD, Ca2+, S2- and oil in waste water before and after passing through the membrane.

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Effect of Evaporation Time on Separation Performance of Polysulfone/Cellulose Acetate (PSF/CA) Membrane

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/299/1/012040 ◽

2018 ◽

Vol 299 ◽

pp. 012040

Author(s):

Intan Syahbanu ◽

Bambang Piluharto ◽

Syahrul Khairi ◽

Sudarko

Keyword(s):

Cellulose Acetate ◽

Separation Performance ◽

Evaporation Time

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FOULING BEHAVIOR OF MODIFIED CELLULOSE ACETATE ASYMMETRIC MEMBRANES FOR DIFFERENT BRACKISH WATER TREATMENT

REAKTOR ◽

10.14710/reaktor.17.1.43-52 ◽

2017 ◽

Vol 17 (1) ◽

pp. 43

Author(s):

Tutuk Djoko Kusworo ◽

B Budiyono ◽

Ulfa Nurul Aulia Rochyani

Keyword(s):

Water Treatment ◽

Cellulose Acetate ◽

Skin Layer ◽

Cellulose Acetate Membrane ◽

Treatment Technology ◽

Membrane Pore ◽

Membrane Morphology ◽

Dope Solution ◽

And Performance ◽

Membrane Pore Size

Water treatment technology which is being widely developed is membrane technology as an alternative technology with sieving mechanism principle.The main purposes of this research are to investigate the effects of additives and thermal treatment on the cellulose acetate membrane morphology and performance in treating brackish water.The membrane was fabricated by preparation of dope solution consits of cellulose acetate and acetone. The membrane was casted via NIPS method using mechanic casting knife. Dope solution was prepared by varying the PEG concentration of 1 and 5wt-% and the annealing temperature at 60°C and 25°C for 10 seconds. The backwash technique was used to solve fouling mechanism in this system .The results of SEM and FTIR showed that theb higher PEG addition to the dope solution resulted in larger membrane pore size and increase the hydrophilic properties of membrane. However the higher temperature and the longer annealing timg, the skin layer of membrane become denser. The result was also shown that back wash technique can reduced fouling phenomenon in the membrane.

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