Role of foam drainage in producing protein aggregates in foam fractionation

Li, Rui; Zhang, Yuran; Chang, Yuwei; Wu, Zhaoliang; Wang, Yanji; Chen, Xiang'e; Wang, Tao

doi:10.1016/j.colsurfb.2017.07.040

Cited by 8 publications

(2 citation statements)

References 25 publications

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“…The first study mentioning this process was reported in 1937 by Ostwald and Sierh when they separated albumen from beet and potato juices [8,13,14]. Years later, illuminating works on the subject were discussed in the literature [15][16][17] and the process has since become the target of research [18][19][20][21][22][23][24][25][26][27][28][29][30][31].…”

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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“…Proteins in tofu whey were identified as predominantly glycinin, basic 7S globulin, γ-conglycinin, and β-conglycinin (Stanojević et al, 2023), where the more abundant glycinin had more hydrophobic groups on the surface that contributed to higher adsorption of oil/protein on the interface (Riblett et al, 2001). The configuration of hydrophobic and hydrophilic groups contributes to protein agglomeration and drainage during foam fractionation (Li et al, 2017). On the other hand, foam drainage and holdup time are also influenced by the interaction between the foam-protein system and reactor surface, therefore, the use of a hydrophobic surface is envisaged (Liu et al, 2017).…”

Section: Process Evaluationmentioning

confidence: 99%

Protein Recovery from Tofu Whey Wastewater Using a Column Reactor: Preliminary Results

PERMATASARI,

SENANIA,

DARA

et al. 2023

Jurtekling

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ABSTRAK Industri tahu menghasilkan air limbah pekat atau whey (dadih), yang memiliki pH rendah dan bahan organik yang tinggi, sehingga dapat menyebabkan pencemaran lingkungan jika tidak diolah dengan baik. Di sisi lain, salah satu kandungan limbah tahu pekat yaitu protein dapat dimanfaatkan kembali untuk mengurangi potensi pencemaran lingkungan dan diolah lebih lanjut menjadi produk yang bernilai ekonomis. Penelitian ini bertujuan untuk mendapatkan data awal untuk menilai kelayakan penggunaan metode fraksinasi busa untuk pemulihan protein dari limbah tahu pekat. Limbah tahu pekat dalam penelitian kami memiliki konsentrasi protein awal 3.115 mg/l. Percobaan dilakukan dengan menggunakan reaktor fraksinasi busa berbentuk kolom dalam mode semi-curah. Kombinasi tiga laju alir udara (10, 30, dan 60 l/jam) dan tiga konsentrasi limbah tahu pekat (10, 50, dan 100%) diuji. Hasil percobaan menunjukkan bahwa konsentrasi protein awal mempengaruhi pemulihan protein, sehingga diperlukan konsentrasi protein awal sekitar 3.000 mg/l. Rasio pengayaan tertinggi 1,0 ± 0,5, setara dengan pemulihan protein 6 ± 4%, dicapai pada laju alir 10 l/jam dan konsentrasi limbah tahu pekat 100%. Peningkatan laju alir hingga 30 l/jam tidak mengubah rasio pengayaan (0,9 ± 0,2), tetapi meningkatkan pemulihan protein hingga 71 ± 14%. Penelitian lebih lanjut diperlukan untuk parameter-parameter lain seperti konsentrasi protein awal, komposisi limbah tahu pekat, laju aliran udara, ukuran gelembung, holdup cairan, dan desain reaktor. ABSTRACT The tofu industry generates highly-polluted wastewater called whey, which has a low pH and high organic matter, and therefore can cause environmental pollution when not treated properly. On the other hand, one of the whey constituents namely protein can be recovered from the wastewater to reduce its environmental potency and to be further processed as a product that has an economic value. This study aimed to obtain preliminary data to assess the feasibility of using the foam fractionation method for the recovery of protein from tofu whey wastewater. Tofu whey in our study had an initial protein concentration of 3115 mg.L-1. The experiment was performed using a column foam fractionation reactor in a semi-batch mode. Combinations of three air flow rates (10, 30, and 60 L.h-1) and three tofu whey concentrations (10, 50, and 100%) were tested. Our results show that initial protein concentration influenced protein recovery, with a protein concentration of approximately 3000 mg.L-1 required. The highest enrichment ratio of 1.0 ± 0.5, which corresponded to 6 ± 4% protein recovery, was achieved at 10 L.h-1 flow rate and 100% whey concentration. Increasing the flow rate to 30 L.h-1 did not change the enrichment ratio (0.9 ± 0.2), but increased the protein recovery to 71 ± 14%. Further investigation is needed for parameters such as initial protein concentration, whey composition, air flow rate, bubble size, holdup time, and reactor design.

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Foam fractionation for effective recovery of resveratrol from the leaching liquor of Polygonum cuspidatum by using partially ethylated β-cyclodextrin as collector and frother

Liu

Tian

et al. 2018

Industrial Crops and Products

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Role of foam drainage in producing protein aggregates in foam fractionation

Cited by 8 publications

References 25 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

Protein Recovery from Tofu Whey Wastewater Using a Column Reactor: Preliminary Results

Foam fractionation for effective recovery of resveratrol from the leaching liquor of Polygonum cuspidatum by using partially ethylated β-cyclodextrin as collector and frother

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