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Simultaneous degumming, dewaxing and decolorizing crude rice bran oil using nonporous membranes

Manjula, S. and Subramanian, R. (2009) Simultaneous degumming, dewaxing and decolorizing crude rice bran oil using nonporous membranes. Separation and Purification Technology, 66 (2). pp. 223-228. ISSN 1383-5866

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Abstract

Efficacy of nonporous membrane has been evaluated for simultaneous degumming, decolorizing and dewaxing crude rice bran oil (CRBO). Membrane processing of CRBO showed that phospholipids (PL) were almost completely rejected (>99%) by nonporous membranes in both industrial and laboratory-prepared samples. Phosphorus levels in the membrane processed rice bran oil (RBO) samples were very low (<2ppm) which indicated that both hydratable as well as nonhydratable PL were effectively rejected by the membrane. Further phosphoglycolipids were absent in the permeate (processed oil) whose presence in degummed RBO affects the color in the subsequent processing, posing problem in producing an acceptable quality final product. The color reduction measured in terms of area under the visible spectra (350-550nm) was to the extent of 50-55%. The membrane process also reduced the wax content to the extent of 40-50%. Hexane-dilution improved the oil flux by one order of magnitude without affecting the selectivity to a greater extent. The results revealed that processing using nonporous membranes could be an effective pretreatment step for achieving the techno-economical benefits of physical refining of CRBO.

Item Type: Article
Uncontrolled Keywords: Decolorization Degumming Dewaxing Rice bran oil Nonporous membrane
Subjects: 600 Technology > 08 Food technology > 05 Processing and Engineering
600 Technology > 08 Food technology > 19 Lipids-oils/fats
Divisions: Food Engineering
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 18 Jun 2009 04:29
Last Modified: 28 Dec 2011 10:09
URI: http://ir.cftri.com/id/eprint/9051

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