Effect of transmembrane pressure on microfiltration concentration of yeast biomass

Ковалева, О. А.; Лазарев, С. И.; Ковалев, С. В.

doi:10.1134/s0965544117110044

Cited by 7 publications

(8 citation statements)

References 13 publications

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“…The total membrane area (per unit volume of the system) is 13.6% greater than in the system proposed in [11]; and 8.1% less than in the system in [12]. The volume of industrial solution processed (per unit system volume) in the proposed equipment is 88.1% greater than in [11] and 17.3% greater than in [12].…”

mentioning

confidence: 87%

“…Analysis of the literature does not reveal a wide range of systems for processing solutions, except in [11,12]. While such systems are described, little attention is paid to optimizing their design in terms of strengths.…”

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confidence: 99%

“…This method is used to determine the effective working area in the proposed electromembrane system (for comparison with the systems in [11,12]) and to calculate the volume of solution processed in relation to the system volume (Table 1).…”

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confidence: 99%

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Optimized Flat-Chamber Electrobaric Membrane System for the Processing of Industrial Solutions

Лазарев

Selivanov

et al. 2021

Russ. Engin. Res.

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The development of an optimized flat-chamber electrobaric membrane system is considered. In the design of electromembrane systems for the separation of solutions in the chemical industry and in manufacturing, efficient use of polyamide 6 (PA6) in the workpiece may be ensured. Two-loop supply of the charged solution (successive circulation) is promising in such electrobaric membrane systems. The key to the design is to determine the total area of membrane filtration.

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confidence: 87%

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confidence: 99%

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Optimized Flat-Chamber Electrobaric Membrane System for the Processing of Industrial Solutions

Лазарев

Selivanov

et al. 2021

Russ. Engin. Res.

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“…In a particular case, similar characteristics are associated with the hydrodynamic permeability of the solution through the membrane, and this also depends on the distribution of pores along the radii for a particular type of membrane. The development of methods for assessing the distribution of pores by radii (or diameters) and the study of the surface microstructure for a particular membrane partition is still relevant today [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Studies of the pore space of the UPM-K, UAM-50, UAM-100 composite ultrafiltration membrane

Лазарев

Ковалева

Хорохорина

et al. 2021

JAMT

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The development of methods for assessing the distribution of pores by radii (or diameters) and studying the microstructure of the surface of a membrane partition is an urgent task. The authors of the paper carried out experimental studies of the pore diameter distribution for the UPM-K ultrafiltration membrane, determined the porosity and hydrodynamic permeability of the UAM-50, UAM-100 membranes. The analysis of the experimental results showed that the UPM-K ultrafiltration membrane had an average pore diameter of 54 nm. The UAM-50 and UAM-100 membranes were characterized by an asymmetric structure (an active layer (dense) and a porous substrate), while the pores were 2.5–40 and 10–40 nm in size, respectively. The experiments on the study of the hydrodynamic permeability of UAM-50, UAM-100 ultrafiltration membranes when separating a solution of sodium lauryl sulfate showed that the kinetic response curves of the “membrane-solution” system were conventionally divided into two stages. The first stage of the process was faster and lasted only a few minutes. After 7.8 and 13.05 min, the hydrodynamic permeability decreased by ~ 27 %, 7 %, which was due to structural changes in the cellulose acetate layer under the action of mechanical load (transmembrane pressure). The second stage was slower – with a duration of ~ 33 and 60 min and a decrease in hydrodynamic permeability by 41 % and 11 %. Based on the analysis of the approximating function, the rate constants of the membrane separation of solutions and the empirical coefficients of the equation are found.

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“…Membrane filtration is a process in which many types of soft particles can be present such as proteins 3,4 , cells 5 and sludge flocs 6,7 . Although membrane filtration is used for various separations, ranging from microfiltration to reversed osmosis, and even gas separation, in most of these processes, particle properties play an important role.…”

Section: Introductionmentioning

confidence: 99%

Microfluidic model systems used to emulate processes occurring during soft particle filtration

Meireles

Bouchoux

Schroën

2019

Sci Rep

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Cake layer formation in membrane processes is an inevitable phenomenon. For hard particles, especially cake porosity and thickness determine the membrane flux, but when the particles forming the cake are soft, the variables one has to take into account in the prediction of cake behavior increase considerably. In this work we investigate the behavior of soft polyacrylamide microgels in microfluidic model membranes through optical microscopy for in situ observation both under regular flow and under enhanced gravity conditions. Particles larger than the pore are able to pass through deformation and deswelling. We find that membrane clogging time and cake formation is not dependent on the applied pressure but rather on particle and membrane pore properties. Furthermore, we found that particle deposits subjected to low pressures and low g forces deform in a totally reversible fashion. Particle deposits subjected to higher pressures only deform reversibly if they can re-swell due to capillary forces, otherwise irreversible compression is observed. For membrane processes this implies that when using deformable particles, the pore size is not a good indicator for membrane performance, and cake formation can have much more severe consequences compared to hard particles due to the sometimes-irreversible nature of soft particle compression.

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Effect of transmembrane pressure on microfiltration concentration of yeast biomass

Cited by 7 publications

References 13 publications

Optimized Flat-Chamber Electrobaric Membrane System for the Processing of Industrial Solutions

Optimized Flat-Chamber Electrobaric Membrane System for the Processing of Industrial Solutions

Studies of the pore space of the UPM-K, UAM-50, UAM-100 composite ultrafiltration membrane

Microfluidic model systems used to emulate processes occurring during soft particle filtration

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