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Soy protein recovery in a solvent‐free process using continuous liquid–solid circulating fluidized bed ion exchanger
Author(s) -
Prince Andrew,
Bassi Amarjeet S.,
Haas Christine,
Zhu Jesse X.,
Dawe Jennifer
Publication year - 2011
Publication title -
biotechnology progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 129
eISSN - 1520-6033
pISSN - 8756-7938
DOI - 10.1002/btpr.725
Subject(s) - soy protein , chemistry , ion exchange , fluidization , chromatography , extrusion , desorption , adsorption , precipitation , fluidized bed , chemical engineering , food science , ion , materials science , organic chemistry , physics , meteorology , engineering , metallurgy
Abstract Soy protein concentrates and soy protein isolates act as ingredients in bakery, meat and dairy products, baby formulas, starting materials for spun textured vegetable products, and other nutritional supplements. In this study, the effectiveness of a liquid–solid circulating fluidized bed (LSCFB) ion exchanger is demonstrated for the recovery of soluble soy proteins from full fat and defatted soy flour. Under steady‐state operating conditions, about 50% of the proteins could be recovered from the feed streams entering the ion exchanger. The LSCFB was shown to be a promising system for the recovery of soy protein from both defatted and full fat soy flour solutions. As the ion exchange process captures dissolved proteins, the system may offer a less damaging form of processing compared with the acid precipitation process where soy protein aggregates form and functionality is affected. In addition, the LSCFB allows simultaneous adsorption and desorption of the proteins allowing for a continuous operation. No prefiltration of feed containing suspended particles is required as well, because fluidization is used in place of packed bed technology to improve on current ion exchange processes. © 2011 American Institute of Chemical Engineers Biotechnol. Prog., 2012