Effects of cavitation on different microorganisms: The current understanding of the mechanisms taking place behind the phenomenon. A review and proposals for further research

Zupanc, Mojca; Pandur, Žiga; Perdih, Tadej Stepišnik; Stopar, David; Petkovšek, Martin; Dular, Matevž

doi:10.1016/j.ultsonch.2019.05.009

Cited by 186 publications

(114 citation statements)

References 168 publications

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“…When we compared the sizes of the cleaning area, model D had the largest cleaning area of 100.83 cm 2 , which increased up to 39.65% compared to model A which cleaning area was 72.20 cm 2 , and larger than model B as well. From Figures 7 and 8, the acoustic pressure distribution indicated that the design of the UCT and transducer position did affect acoustic pressure distribution and cleaning area, consistent to the report in [14][15][16][17][18][19]. Actually, if we relocated some transducers to the side as in the study [17][18][19], we would get a larger cleaning area and higher acoustic pressure than in this study.…”

Section: Validation and Hra Approachsupporting

confidence: 85%

“…In the case which cleaning fluids flow in the UCT, when the flow rate increases, the bubble collapsing rate drops along with the cavitation [13]. The transducers' position also affects cleaning performance; if the transducers are placed in a suitable position, the cleaning performance will be high [14][15][16][17][18][19]. In order to design a UCT with high cleaning performance, computer simulation was applied to find the cause of why the UCT in this industrial factory was not cleaning properly.…”

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confidence: 99%

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A Novel Ultrasonic Cleaning Tank Developed by Harmonic Response Analysis and Computational Fluid Dynamics

Tangsopa

Thongsri

2020

Metals

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The manufacturer of an ultrasonic cleaning tank (UCT) received advise from a customer to seek the cause to why the UCT could not clean their products effectively and develop a novel UCT to replace the conventional model. This UCT had a capacity of 10 L, a frequency of 28 kHz, four horn transducers, and a total power of 200 W. To resolve that problem and respond to customers’ needs, we presented new methods to develop the UCT using the harmonic response analysis (HRA) and computational fluid dynamics (CFD) to simulate the cleaning process which occurred within the UCT based on the actual conditions. Results from the HRA showed that the acoustic pressure in a problematic UCT was low, resulting in a smaller cleaning area, which was consistent with the results from the foil corrosion test, and thus caused the cleaning process to be ineffective. We developed a novel UCT with improved effectiveness by adjusting the design and adding a water circulation system. From the HRA, we were able to design the dimensions of the UTC and position of the transducer to be suitable to increase the acoustic pressure and cleaning area. CFD results enabled us to design proper inlet and outlet shapes, as well as simulate the water flow behavior to find the optimal cleaning condition so the novel UCT had a water circulation system that could eliminate the excess particles.

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Section: Validation and Hra Approachsupporting

confidence: 85%

mentioning

confidence: 99%

A Novel Ultrasonic Cleaning Tank Developed by Harmonic Response Analysis and Computational Fluid Dynamics

Tangsopa

Thongsri

2020

Metals

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“…Other than conventional wastewater treatment methods, which can only selectively remove a specific category of pollutants, the performance of HC spans a wide variety of contaminants, which has the potential to replace multistep treatment methods. Several investigations on HC-assisted treatment of pesticides, dyes, pharmaceuticals, and cyanobacteria have indicated its ability in the elimination of the concerned contaminants [3,4].…”

Section: Introductionmentioning

confidence: 99%

Controlled Hydrodynamic Cavitation: A Review of Recent Advances and Perspectives for Greener Processing

2020

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The 20th century has witnessed a remarkable enhancement in the demand for varieties of consumer products, ranging from food, pharmaceutical, cosmetics, to other industries. To enhance the quality of the product and to reduce the production cost, industries are gradually inclined towards greener processing technologies. Cavitation-based technologies are gaining interest among processing technologies due to their cost effectiveness in operation, minimization of toxic solvent usage, and ability to obtain superior processed products compared to conventional methods. Also, following the recent advancements, cavitation technology with large-scale processing applicability is only denoted to the hydrodynamic cavitation (HC)-based method. This review includes a general overview of hydrodynamic cavitation-based processing technologies and a detailed discussion regarding the process effectiveness. HC has demonstrated its usefulness in food processing, extraction of valuable products, biofuel synthesis, emulsification, and waste remediation, including broad-spectrum contaminants such as pharmaceuticals, bacteria, dyes, and organic pollutants of concern. Following the requirement of a specific process, HC has been implemented either alone or in combination with other process-intensifying steps, for example, catalyst, surfactant, ultraviolet (UV), hydrogen peroxide (H2O2), and ozone (O3), for better performance. The reactor set-up of HC includes orifice, slit venturi, rotor-stator, and sonolator type constrictions that initiate and control the formation of bubbles. Moreover, the future directions have also been pointed out with careful consideration of specific drawbacks.

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“…Actually, the mechanisms of HC effects are more complex than those of ultrasonic effects due to the complicated matrix of HC formation. Beside cavitation number, other hydrodynamic factors, such as inlet pressure, flow rate and velocities in the constrictions, α value (the ratio of total perimeter of the holes to the total area of the opening), and β0 value (the ratio of total area of holes to the cross-sectional area of the pipe), etc., synergistic efficiency [68,69]. The cavitation number (C v ) is usually employed to characterise the cavitation event [65]:…”

Section: Orifice Platesmentioning

confidence: 99%

Plant and Biomass Extraction and Valorisation under Hydrodynamic Cavitation

Ferreira

Crudo³

et al. 2019

Processes

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Hydrodynamic cavitation (HC) is a green technology that has been successfully used to intensify a number of process. The cavitation phenomenon is responsible for many effects, including improvements in mass transfer rates and effective cell-wall rupture, leading to matrix disintegration. HC is a promising strategy for extraction processes and provides the fast and efficient recovery of valuable compounds from plants and biomass with high quality. It is a simple method with high energy efficiency that shows great potential for large-scale operations. This review presents a general discussion of the mechanisms of HC, its advantages, different reactor configurations, its applications in the extraction of bioactive compounds from plants, lipids from algal biomass and delignification of lignocellulosic biomass, and a case study in which the HC extraction of basil leftovers is compared with that of other extraction methods.

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Effects of cavitation on different microorganisms: The current understanding of the mechanisms taking place behind the phenomenon. A review and proposals for further research

Cited by 186 publications

References 168 publications

A Novel Ultrasonic Cleaning Tank Developed by Harmonic Response Analysis and Computational Fluid Dynamics

A Novel Ultrasonic Cleaning Tank Developed by Harmonic Response Analysis and Computational Fluid Dynamics

Controlled Hydrodynamic Cavitation: A Review of Recent Advances and Perspectives for Greener Processing

Plant and Biomass Extraction and Valorisation under Hydrodynamic Cavitation

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