Purification of soluble rice bran fiber using ultrafiltration technology

Document Type

Article

Publication Date

1-1-2012

Abstract

Defatted rice bran (DRB), an excellent source of soluble rice bran fiber (SRBF), is a byproduct of rice bran oil extraction from whole rice bran. The common process for purifying SRBF extracted from DRB, dialysis and alcohol precipitation, is a complex process. Ultrafiltration technology was evaluated as an alternative process. Membranes of molecular weight cut-off (MWCO) 1, 5, and 10kDa were used to purify the SRBF at 100kPa. The apparent viscosity and °Brix of the SRBF solution increased after ultrafiltration, which demonstrated that the SRBF solution was concentrated during the ultrafiltration process. The apparent viscosity of the retentate collected in the ultrafiltration unit with the 1kDa MWCO membrane had a higher (P<0.05) viscosity than those collected in the 5 and 10kDa MWCO membrane. The SRBF solution purified with 1, 5, and 10kDa MWCO had similar concentrations of arabinose, galactose, and glucose, while the retentate of SRBF obtained from 10kDa MWCO membrane had slightly lower xylose concentration than that resulting from 1kDa MWCO. The 10kDa MWCO membrane at a pressure of 100kPa more effectively purified the SRBF solution than did 1 and 5kDa MWCO membranes at the same pressure. © 2011 Elsevier Ltd.

Publication Source (Journal or Book title)

LWT

First Page

574

Last Page

579

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