Demulsification of water-in-oil emulsion by using porous glass membrane

Sun, Dalin; Duan, Xidong; Li, Wenxu; Ding, Zhiying

doi:10.1016/s0376-7388(98)00096-9

Cited by 112 publications

(58 citation statements)

References 20 publications

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“…These values are comparable to those reported in previous work on membrane separation under externally applied pressures 3,4,6,7,39,40 . Furthermore, in intermittent stop-and-go operation, the fluxes did not decrease over a period of 100 h (Fig.…”

Section: Continuous Separation Of Oil-water Emulsionssupporting

confidence: 90%

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Hygro-responsive membranes for effective oil–water separation

et al. 2012

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There is a critical need for new energy-efficient solutions to separate oil-water mixtures, especially those stabilized by surfactants. Traditional membrane-based separation technologies are energy-intensive and limited, either by fouling or by the inability of a single membrane to separate all types of oil-water mixtures. Here we report membranes with hygro-responsive surfaces, which are both superhydrophilic and superoleophobic, in air and under water. our membranes can separate, for the first time, a range of different oil-water mixtures in a singleunit operation, with >99.9% separation efficiency, by using the difference in capillary forces acting on the two phases. our separation methodology is solely gravity-driven and consequently is expected to be highly energy-efficient. We anticipate that our separation methodology will have numerous applications, including the clean-up of oil spills, wastewater treatment, fuel purification and the separation of commercially relevant emulsions.

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Section: Continuous Separation Of Oil-water Emulsionssupporting

confidence: 90%

“…Membranes are typically classified as either hydrophobic or hydrophilic [3][4][5][6][7][8][9][10] . Their wettability by oil is often not specified because, in most cases, such membranes are oleophilic, that is, their contact angle with oil is < 90°.…”

mentioning

confidence: 99%

Hygro-responsive membranes for effective oil–water separation

et al. 2012

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“…This phenomenon leads to an increase in flux (Figure 6). Base on Darcy's law, increasing pressure results in rising permeate flux although leads to compression of the sediments, and accelerates fouling on the surface of the membrane pores [49,50]. All of the experiments were conducted at the constant operating temperature of 14˚C and velocity of 2 m/s to evaluate the effect of the transmembrane pressure on the permeation flow independently.…”

Section: Ultrafiltrationmentioning

confidence: 99%

Integrated Ultrafiltration Membranes and Chemical Coagulation for Treatment of Baker’s Yeast Wastewater

H¹,

Sadeghi²,

Rajaeieh³

et al. 2017

J Membr Sci Technol

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An integrated system ultrafiltration membrane-coagulation has been employed for removal of chemical oxygen demand (COD) and turbidity from baker's yeast effluents. Fouling in the membrane is a common problem; chemical coagulation has been used as a pre-treatment method to mitigate fouling. Poly aluminum chloride (PACl), aluminum sulfate and lime had been used as coagulants. The results indicated that PACl exhibited higher removal efficiency than other coagulants. Two-stage coagulation and combination of coagulants were also investigated. The removal efficiency of COD and turbidity were achieved 68% and 81% by two-stage coagulation by PACl-lime, respectively. The effects of operating conditions on the ultrafiltration process for two types of hollow fiber membranes polyvinylidene fluoride (PVDF) and polypropylene (PP) on permeate flow rate, turbidity and COD removal of wastewater were further investigated. The results showed that by increasing the feed pressure, flow rate and feed temperature the permeate flow rate increased and the removal efficiency decreased. Under optimum conditions, PVDF membrane showed higher performance but compromised the flux compared to PP membrane.

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“…Reduction in flux shows the fouling potential of the wastewater with time. Permeate flux is a measure of membrane performance and it decreases due to the fouling of the membranes [17]. The best fit model for RO membrane fouling followed the intermediate blocking filtration equation, which assumes that all the particles don"t block the membrane pores but settle on other particles [9].…”

Section: Mf-ro Combined Treatment At Optimized Conditionsmentioning

confidence: 99%

MF as Pretreatment of RO for Tertiary Treatment of Biologically Treated Distillery Spentwash

Sharma¹,

Joshi²

2016

IJESD

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Abstract-Biologically treated spentwash from distillery usually contains high chemical oxygen demand (COD), biological oxygen demand (BOD), color, total dissolved solids (TDS) and other contaminants. In India, reverse osmosis (RO) treatment plants have been installed in many of the distilleries at tertiary treatment, but are not properly working due to fouling problem. To make the membrane process proven and reliable technology, proper pre-treatment is mandatory which not only improve quality of RO permeate but also increase life of RO. In the present study, use of micro-filtration (MF) for pre-treatment of RO has been evaluated at the tertiary treatment stage. Experiments were optimized in terms of different operating parameters viz. initial pH (pH o : 2-10), trans-membrane pressure (1-5 bars) and temperature (15-43°C). Experimental data revealed that the MF could be an effective pre-treatment in removing the pollutants (COD, color and TOC) and improving performance and water recovery (permeate flux) in comparison to RO alone. Removal efficiency for COD, color, TDS and TOC was observed as 31.5%, 42.7% and 27.6% with MF, respectively at optimized conditions with increased permeate flux from 17. LPH (RO) to 32 LPH (MF-RO).Index Terms-Bio-digested distillery spentwash, life cycle assessment, pre-treatment, reverse osmosis, response surface methodology, micro-filtration.

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Demulsification of water-in-oil emulsion by using porous glass membrane

Cited by 112 publications

References 20 publications

Hygro-responsive membranes for effective oil–water separation

Hygro-responsive membranes for effective oil–water separation

Integrated Ultrafiltration Membranes and Chemical Coagulation for Treatment of Baker’s Yeast Wastewater

MF as Pretreatment of RO for Tertiary Treatment of Biologically Treated Distillery Spentwash

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