Isolation of soy whey proteins from isoflavones in the concentrated solution using foam fractionation

Liu, Wei; Wu, Zhaoliang; Wang, Yanji; Li, Rui; Huang, Di

doi:10.1016/j.seppur.2015.05.010

Cited by 15 publications

(7 citation statements)

References 34 publications

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“…The final surfactant concentration in the bubble surface can be given according to its adsorption isotherm, the rate of mass transfer in the gas-liquid interface and the process operating parameters. The timed variation of the surfactant concentration can be obtained by mass balance equations in the liquid column [10,[32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Ascertainment of Surfactin Concentration in Bubbles and Foam Column Operated in Semi-Batch

Gonçalves

Santana

2019

Processes

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This paper describes a mathematical model for the convection, diffusion, and balance phenomena for predicting the depletion curves, i.e., variations in the timed surface-active molecule concentration for fractionation processes in bubbles and foam column, operated in semi-batch. The model was applied for the purification of the surfactin solution and the results were compared with experimental data. Gibbs adsorption curves were obtained for the biosurfactant at different temperatures, and then adjusted with estimated parameters, according to the Langmuir adsorption model. The gas bubble sizes were optically determined. The isotherm adsorption parameters and bubble average diameter are crucial for the attainment of the depletion curves, generated by the model described. The results demonstrate that the process is most effective when operating a column with reduced gas flow and low initial concentration. A top product with two or thirty times greater concentration than the initial one was achieved and the highest biosurfactant concentrations were attained for higher operating temperatures. It was also observed that bubble diameter increased with a higher gas flow. The adjustment obtained for the adsorption curves of Gibbs was satisfactory. Therefore, there was evidence that surfactin molecules adsorb in monolayers in the liquid–gas interface.

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Section: Introductionmentioning

confidence: 99%

Ascertainment of Surfactin Concentration in Bubbles and Foam Column Operated in Semi-Batch

Gonçalves

Santana

2019

Processes

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“…However, Figure shows that the increase of superficial air flow rate significantly reduced P u obtained at each asymptotic time from 65.1 to 33.7. In foam fractionation, increasing superficial air flow rate increased both the liquid holdup in foam and the amount of UK molecules adsorbed at bubble surfaces . As a result, both R A and separation efficiency increased.…”

Section: Resultsmentioning

confidence: 98%

“…In human urine, the isoelectric point of UK was near pH 9.0 . The increase in pH reduced the electrostatic charge of UK molecules and thereby weakened the intermolecular electrostatic repulsion, so they were more readily adsorbed at the gas‐liquid interface in foam fractionation . Therefore, both P u and R A obtained by foam fractionation increased as pH increased.…”

Section: Resultsmentioning

confidence: 99%

Foam fractionation for enhancing silica gel adsorption of urokinase from human urine

Wang

Dou

et al. 2019

Asia-Pacific J Chem Eng

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In this work, foam fractionation (FF), a cost-effective method, was used to enhance the silica gel adsorption (SGA) of urokinase from human urine. The analysis of how FF enhanced the adsorption/desorption of urokinase onto silica gel was conducted. The results show that FF increased both the adsorption rate of urokinase onto silica gel and the activity concentration of urokinase adsorbed at silica gel by pre-enriching urokinase from urine. It also reduced the activity loss of urokinase in the desorption process. Then, a coupled technology of FF and SGA was developed. The effects of pH, superficial air flow rate, beta-cyclodextrin concentration, and amount of silica gel added on activity recovery yield and purification fold of urokinase were studied. At pH 7.5, superficial air flow rate 1.70 mm/s, beta-cyclodextrin concentration 0.2 g/L, and amount of silica gel added 0.9%, the activity recovery and purification fold of urokinase reached 89.5% and 56.8 in the coupled technology, which were 25.3% and 79.2% higher than those obtained by SGA alone, respectively. Furthermore, the amount of silica gel added in the coupled technology was 40.0% lower than that in SGA alone. Therefore, FF effectively enhanced the SGA of urokinase from human urine.

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“…Soybean seeds are basically constituted by proteins, lipids, carbohydrates, and ashes in the average proportions of 40%, 20%, 15%, and 5% in dry mass, respectively. Around 85% of the world production of soy is destined for crushing, as a result of which soybean meal (made basically of proteins), and soybean oil (lipids) are produced as the byproducts of the processing 32 . So‐called soybean meal is used mostly to produce animal feed (around 98% of the total production), and the rest is sent to soybean protein factories.…”

Section: Resultsmentioning

confidence: 99%

Soybean‐based concept biorefinery

Biazatti

Miranda

2021

Biofuels Bioprod Bioref

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Soybean is an important commodity. Its processing generates a great variety of important commercial products and processable residues. Using the concept of biorefinery, it is possible to integrate different technologies and increase the value added by the whole process. In this work, we conducted an oriented review. First, a base process was chosen, which would produce edible soybean oil, soy protein, and soy protein isolate. From this base process, we listed the residues and made a review of the processing technologies to convert them into valuable products. We elaborated a process network for each residue, linking the intermediary products to their processing technologies and, subsequently, the commercial value‐added products. Based on a price and market evaluation, the result was an integrated conceptual biorefinery process for soybean processing, mostly considering the Brazilian scenario. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd

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Isolation of soy whey proteins from isoflavones in the concentrated solution using foam fractionation

Cited by 15 publications

References 34 publications

Ascertainment of Surfactin Concentration in Bubbles and Foam Column Operated in Semi-Batch

Ascertainment of Surfactin Concentration in Bubbles and Foam Column Operated in Semi-Batch

Foam fractionation for enhancing silica gel adsorption of urokinase from human urine

Soybean‐based concept biorefinery

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