Concentration polarization, membrane fouling and cleaning in ultrafiltration of soluble oil

Lee, Soobok; Aurelle, Y.; Roques, H.

doi:10.1016/s0376-7388(00)80168-4

Cited by 129 publications

(65 citation statements)

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“…Prasad and Sirkar (1987) made measurements of the breakthrough pressure for the nonwetting fluid (water), but did not measure interfacial tension and contact angles. Lee et al (1984) measured permeability of water through hydrophilic membranes at increasing levels of oil fouling. They used the capillary equation to estimate the pressure required to force oil droplets into the membrane:…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Bhave and Fleming (1988) investigated dilute suspensions of oil-in-water containing up to 5% oil using hydrophilic alumina (Membralox) membranes. Lee et al (1984) used hydrophilic ultrafiltration membranes (Iris 3042, Rhone Poulenc) to remove soluble oils. Kutowy et al (1981) used cellulose acetate (hydrophilic) membranes for treatment of oily wastes containing 5 to 35% oil.…”

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confidence: 99%

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Demulsification of water/oil/solid emulsions by hollow‐fiber membranes

1996

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Section: Theoretical Backgroundmentioning

confidence: 99%

mentioning

confidence: 99%

Demulsification of water/oil/solid emulsions by hollow‐fiber membranes

1996

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“…They were rejected at the membrane pore and were swept out the end of the module in a concentrated stream. The rapid decline in flux with time is explained by the build-up of a polarized layer of oil emulsion at the membrane surface and also by the blocking of pores by oil droplets (Lee et al, 1984;Lipp et al, 1988). Of the three ceramic membranes examined in this study, both ZrO 2 -UF and ZrO 2 -MF allowed filtration to advance efficiently with little formation of the fouling layer by oil droplets or pore blocking.…”

Section: Resultsmentioning

confidence: 81%

Differential Recovery of Terpene Hydrocarbons and Oxygenated Compounds from Condensates Containing Essential Oil Discharged during Concentration of Citrus Juices Using a Ceramic Membrane

Sakamoto¹,

Fujii²,

Inoue³

et al. 2003

FSTR

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Essential oils of citrus fruits have many uses in consumer products so that efficient methods for their isolation are needed. Membranes are often used in the separation process but a common problem is that the flux through the membranes decreases with time. In the present study we examined whether ceramic membranes might be better at maintaining the flux at acceptable levels. To test the membranes, we attempted differential recovery of nonpolar terpene hydrocarbons and aqueous oxygenated compounds from condensates produced as a by-product during the concentration of citrus juices. When zirconia membranes (ZrO 2 -UF, cut-off molecular weight 50,000 and ZrO 2 -MF, pore size 0.08 m) were used, little decrease in the flux was observed during filtration. The nonpolar terpene hydrocarbons were retained while more polar oxygenated flavor compounds passed through the membrane. The percentages of alcohols, esters, and aldehydes in the permeate increased markedly compared with their percentages before filtration. When the condensate from the concentration process of citrus juice sampled from a juice factory was filtered using ZrO 2 -UF, the hydrocarbons was concentrated, and a water-soluble essence consisting primarily of oxygenated compounds was obtained in the permeate.

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“…This is essential because previous work has demonstrated that during microfiltration of emulsions the removed oil phase tends to adsorb to the membrane surface, thus considerably changing the membrane's effective surface behavior (10,11).…”

Section: Resultsmentioning

confidence: 99%

Removal of Industrial Cutting Oil from Oil Emulsions by Polymeric Ultra- and Microfiltration Membranes

Janknecht

Lopes

Mendes

2004

Environ. Sci. Technol.

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The utilization of micro-and ultrafiltration with polymeric membranes for treatment of industrial cutting oil emulsion was investigated. The performance of 14 different membranes with pore sizes in the range of 1-800 nm, representing 8 different materials and varying hydrophobicity, was determined experimentally. Membrane permeances between 1.6 and 939 L m -2 h -1 bar -1 have been observed for the different samples as well as oil rejections between 3.42% and 99.99%. Membrane pore size and contact angle showed little influence on both values, while an interesting correlation is displayed to the individual membranes' capillary pressures. A possible explanation for this phenomenon is suggested based on the formation of oil films on the membrane surface. From the investigated membranes, the best-suited one for cutting oil treatment was selected and subjected to further experiments. The effect of process temperatures between 22 and 43°C and of feed oil concentrations between 0 and 20 vol % on the removal performance was determined. The results correspond to the explanation suggested previously.

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Concentration polarization, membrane fouling and cleaning in ultrafiltration of soluble oil

Cited by 129 publications

References 4 publications

Demulsification of water/oil/solid emulsions by hollow‐fiber membranes

Demulsification of water/oil/solid emulsions by hollow‐fiber membranes

Differential Recovery of Terpene Hydrocarbons and Oxygenated Compounds from Condensates Containing Essential Oil Discharged during Concentration of Citrus Juices Using a Ceramic Membrane

Removal of Industrial Cutting Oil from Oil Emulsions by Polymeric Ultra- and Microfiltration Membranes

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