Influence of Design Parameters on Biomass Separation in Mini‐hydrocyclones

Brito-Parada, Pablo R.; Dewes, R.; Vega-Garcia, Dennis; Cilliers, J.J.

doi:10.1002/ceat.201800290

Cited by 10 publications

(4 citation statements)

References 13 publications

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“…These parameters were changed based on previous papers to improve the separation performance. For instance, it was found that expanding the overflow diameter has a positive impact on the separation process [11,38], so it was increased to 5 mm in the current work. However, the separation performance was found not to be influenced by the height of the vortex finder [38], so it was not changed.…”

Section: Geometry Of the Hydrocyclonesmentioning

confidence: 82%

“…The total experimental concentration ratio was obtained as 1.2 for MC‐3at 120 mL s −1 inlet flow rate and 0.5 wt % feed concentration which is higher than reported by Pinto et al (1.11) 47 with the same particle size. Overall, there is a trade‐off between amount of solid recovery from underflow and concentration ratio although both of them are the separation performance 38. In fact, the high solid recovery might not mean the better separation performance because it is possible that the most of the inlet volume flow rate exits from the underflow for the sake of a large underflow diameter.…”

Section: Resultsmentioning

confidence: 99%

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Numerical and Experimental Biomass Separation from Fermentation Process by Minihydrocyclones

et al. 2020

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Biomass particle separation is challenging in the pharmaceutical industry because of the smallness and lightness of such particles. Centrifugation is applied conventionally for batch separation. However, imposing multiple wash steps in order to eliminate culture residues and the high risk of extrinsic contamination hamper batch techniques. In this research, minihydrocyclones were introduced to provide a better solution for the mentioned limitations in continuous processes. Numerical separation of methylotrophic yeast from fermentation broth was carried out in three hydrocyclones with different lengths, and the most efficient one was examined experimentally. Three various feed flow rates and seven feed concentrations were evaluated. The concentration of biomass suspension in the product was raised to 20 %.

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Section: Geometry Of the Hydrocyclonesmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Numerical and Experimental Biomass Separation from Fermentation Process by Minihydrocyclones

et al. 2020

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“…The operational success of a hydrocyclone depends on the relationship between its main dimensions. − Consequently, it is possible to manipulate or optimize the geometric variables of this device in order to meet the demands of a specific application. − In addition, its performance can also be improved by modifying its construction, creating the so-called nonconventional hydrocyclones. These new devices may have a parabolic shape instead of conical, − the structure of their vortex finder modified, − a solid rod inserted along their vertical axis, , and the number of feeds or design of the feed ducts changed. − …”

Section: Introductionmentioning

confidence: 99%

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

Morimoto,

Gonçalves,

Barrozo

et al. 2023

Ind. Eng. Chem. Res.

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Hydrocyclones are devices used to separate a discrete phase (solid or liquid) from a continuous liquid phase. Although this partition process is simple and versatile, there are limitations when separating concentrated suspensions with high viscosity. By replacing the cylinder or cone walls of hydrocyclones by a permeable wall, our research group developed the so-called filtering hydrocyclones. Although previous studies have shown that filtering hydrocyclones have a better performance than conventional devices of the same geometry, they were performed with diluted Newtonian suspensions. Thus, the aim of the present work is to evaluate the performance of a filtering and a conventional hydrocyclone of the same geometry operating with concentrate suspensions with pseudoplastic rheological behavior. The geometric relationship of these hydrocyclones was obtained in a previous optimization study that aimed at maximizing overall efficiency in aqueous diluted suspensions; this high-efficiency device is known as MOEH. When operating a pseudoplastic fluid with a behavior index equal to 0.6536, there was a 48% decrease in the efficiency of the MOEH hydrocyclone. The MOEH experiments performed with a pseudoplastic suspension containing 9.5 wt % of solids and 0.6 wt % of carboxymethyl cellulose achieved an Euler number of 1108, a split ratio of 44%, and an overall efficiency of 47%. However, the average results demonstrated that the operation with the newly designed filtering hydrocyclone, called MOEH-CoF, led to an Euler number about 10% lower and an overall efficiency about 5% higher than that obtained with the conventional device. The findings of this study can lead to a better understanding of solid–liquid separation in the petrochemical, mineral, and food industries, which generally works with concentrated non-Newtonian fluids.

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“…Experimental research on mini-hydrocyclone design parameters, such as spigot and vortex finder, has often been limited to designs that are commercially available. More recently, this drawback has been overcome by the application of 3D printing technology as a tool for manufacturing mini-hydrocyclones [11,12,13].…”

Section: Introductionmentioning

confidence: 99%

CFD modelling of particle classification in mini-hydrocyclones

Vega-Garcia

Cilliers

Brito-Parada

2020

Separation and Purification Technology

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This work presents validated Computational Fluid Dynamics (CFD) predictions of the effect that changes in vortex finder and spigot diameters have on the classification performance of mini-hydrocyclones. Mini-hydrocyclones (e.g. 10 mm in diameter) have been applied successfully to the separation of micron-sized particles since their bypass fraction is larger than the water recovery, which results in a high particle recovery to the underflow, as well as low water recovery. However, a larger bypass fraction can be a disadvantage when the purpose of the hydrocyclone is particle classification, because of the large amount of fine particles that are misplaced in the underflow.Although it is well known that changes in the outlets of the hydrocyclone affect its performance, there is limited research on the effect of these design

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Influence of Design Parameters on Biomass Separation in Mini‐hydrocyclones

Cited by 10 publications

References 13 publications

Numerical and Experimental Biomass Separation from Fermentation Process by Minihydrocyclones

Numerical and Experimental Biomass Separation from Fermentation Process by Minihydrocyclones

Study on Filtering Hydrocyclones Operating with Concentrated Non-Newtonian Suspensions

CFD modelling of particle classification in mini-hydrocyclones

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