Influence of Acoustic Oscillations on Continuous-Flow Water Disinfection

Abramova, Anna V.; Bayazitov, Vadim M.; Fedulov, Igor S.; Nikonov, Roman V.; Систер, В. Г.; Cravotto, Giancarlo

doi:10.3390/pr8101259

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…Continuous reactors with incorporated sonotrodes combine high-intensity, focused ultrasound and the advantages of continuous flow systems. Such a system can be used in a wide range of applications. − Servili et al used a continuous reactor equipped with cascatrodes to extract oil from the olive paste. The ultrasonic device, manufactured by Hielscher Gmbh (Teltow, Germany), consists of an ultrasonic generator (20 kHz), a power supply (4 kW), and cascatrodes placed in a vertical stainless-steel tube (Figure a).…”

Section: Ultrasonic Reactor Configurationsmentioning

confidence: 99%

Sonoprocessing: From Concepts to Large-Scale Reactors

et al. 2021

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Intensification of ultrasonic processes for diversified applications, including environmental remediation, extractions, food processes, and synthesis of materials, has received attention from the scientific community and industry. The mechanistic pathways involved in intensification of ultrasonic processes that include the ultrasonic generation of cavitation bubbles, radical formation upon their collapse, and the possibility of fine-tuning operating parameters for specific applications are all well documented in the literature. However, the scale-up of ultrasonic processes with large-scale sonochemical reactors for industrial applications remains a challenge. In this context, this review provides a complete overview of the current understanding of the role of operating parameters and reactor configuration on the sonochemical processes. Experimental and theoretical techniques to characterize the intensity and distribution of cavitation activity within sonoreactors are compared. Classes of laboratory and large-scale sonoreactors are reviewed, highlighting recent advances in batch and flow-through reactors. Finally, examples of large-scale sonoprocessing applications have been reviewed, discussing the major scale-up and sustainability challenges.

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Section: Ultrasonic Reactor Configurationsmentioning

confidence: 99%

Sonoprocessing: From Concepts to Large-Scale Reactors

et al. 2021

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Mechanisms of Water Pollutant Degradation under Electric Discharge Generated in a Cavitating Flow

Kamler,

Bayazitov,

Sozarukova

et al. 2024

Clean Technol.

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With the aim of developing an innovative water treatment approach for developing countries in the Global South, we have applied the method of treating a cavitating water stream with a plasma discharge under real conditions. To this end, we have optimised the approach after investigating the effects that occur in the treated medium during such a treatment. Based on the obtained light absorption curves of treated model solutions of titanium oxysulphate and potassium bichromate, it was found that inside the reactor the main role in the destruction of chemical contaminants is played by hydroxide ions, while outside the reactor the main chemical interaction takes place with hydrogen peroxide. The plasma treatment unit was tested in the biological wastewater treatment plant of a health resort in the territory of the Russian Federation (Almetyevsk, Republic of Tatarstan). Water samples taken directly from the tertiary decantation tank were used as real wastewater samples instead of adding chemical reagents for disinfection. It was found that with different modes of operation of the plasma treatment plant, the concentration levels of coliform bacteria, coliphages and Escherichia coli decreased significantly and fell below the limit of permissible concentrations for wastewater discharge. At the same time, the possible effect of the plasma on persistent inorganic compounds was investigated. It was shown that the plasma discharge in the flow of the incoming liquid can almost completely destroy compounds that are difficult to remove, such as hydrogen sulphide and chlorides. In the course of the study, the optimum frequency of electrical pulses of 68 kHz was selected, which ensures the lowest consumption of electrical energy while maintaining the required efficiency.

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Influence of Acoustic Oscillations on Continuous-Flow Water Disinfection

Cited by 2 publications

References 7 publications

Sonoprocessing: From Concepts to Large-Scale Reactors

Sonoprocessing: From Concepts to Large-Scale Reactors

Mechanisms of Water Pollutant Degradation under Electric Discharge Generated in a Cavitating Flow

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