|Table of Contents|

Purification of Soy Molasses Supernatant by Ion-Exchange Resins

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2016年01期
Page:
130-135
Research Field:
Publishing date:

Info

Title:
Purification of Soy Molasses Supernatant by Ion-Exchange Resins
Author(s):
SHI Yun KONG Xiang-zhen HUA Yu-fei
School of Food Science and Technology/State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
Keywords:
Soy molasses Ion-exchange Soy oligosaccharides Adsorption
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2016.01.0130
Abstract:
Soy molasses supernatant mainly consists of soy oligosaccharides (sucrose, raffinose and stachyose) and other impurities such as chromogenic substances, inorganic salts, nitrogen-containing components and organic acids.This paper studied the mechanism of removing impurities from decolorized soy molasses supernatant by ion-exchange resins, and optimized the process.The results showed that the main nitrogen-containing components were five kinds of free amino acids (Aspartic acid, Glutamic acid, Asparagine, Alanine and Tyrosine) and one kind of dipeptide (Glu-Tyr).Adoption of decolorized supernatant by ion-exchange resins showed low efficient since the handling capacity was about just 3 times of column volume when the effluent broke through. However, ion-exchange resins performed very well on adsorbing nitrogen-135containing components from pure solution with handling capacity of 40 times of column volume. Therefore, it was reasonable to consider that the limiting factors of adsorption were inorganic salts (Na+, K+and Cl-) and organic acid (Citric acid). After desalination by electrodialysis, handling capacity for adsorption of nitrogen-containing components by anion resin rose to about 35 times of column volume.And then high-purity soy oligosaccharides could be got by removing organic acid using anion resin from effluent of cation resin column Besides, the maximum solid phase concentration for nitrogen-containing components and citric acid was respectively calculated by fitting Thomas model.

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Last Update: 2016-02-05