Cavitation-Based Processes for Water and Wastewater Treatment

Fedorov, Kirill; Cako, Elvana; Dinesh, G. Kumaravel; Soltani, Reza Darvishi Cheshmeh; Wang, Zhaohui; Khan, Javed Ali; Boczkaj, Grzegorz

doi:10.1007/698_2022_866

Cited by 3 publications

(2 citation statements)

References 166 publications

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“…The main reactions occurring in the cavitation zone are thermal decomposition of chemical compounds as well as oxidation by oxygen. [9] The great interest in this topic is supported by the increasing number of publications devoted to a number of aspects related to the formation of cavitation phenomena and their application to water and wastewater treatment, as well as hybrid processes based on external oxidizers that provide efficient formation of radical forms under cavitation conditions.…”

Section: Investigation Of the Impact Of Cavitation On Various Mediamentioning

confidence: 99%

Investigation of the effects of cavitation on different media in a device with a discrete secondary

Minkin,

Kuimov,

Mazanko

2024

E3S Web Conf.

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Preserving food and improving the quality of drinking water are of paramount importance to the public. Despite the very different objectives of food preservation and drinking water disinfection, these problems have in common the destruction of microorganisms. In this regard, the actual problem, which has been the focus of research in recent years, is the development of new technologies capable of non-thermal treatment of liquid substances and foodstuffs and not using chemical reagents. Hydrodynamic cavitation can be a promising technology for non-thermal treatment of liquid substances, including wastewater and food liquid products. This paper presents the results of our own study of the effect of cavitation on microorganisms under given conditions in a device with a discrete secondary part.

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Section: Investigation Of the Impact Of Cavitation On Various Mediamentioning

confidence: 99%

Investigation of the effects of cavitation on different media in a device with a discrete secondary

Minkin,

Kuimov,

Mazanko

2024

E3S Web Conf.

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“…In non-elastic media like water and most liquids, increasing the amplitude causes negative pressure in rarefaction areas, leading to liquid fracture-a phenomenon known as cavitation (Zupanc et al (2019). According to Erriu et al (2014) andBaker et al, (2001) that the effects of cavitation on bacteria can be divided into several stages: (a) Under the action of ultrasound, the microbubbles will periodically expand and contract and the nearby bacteria and bacterial film will also scale accordingly; (b) If the ultrasonic intensity is high enough, the generated pressure gradient will burst the bubbles instantaneously, and the resulting instantaneous shearing force may have a shearing effect on the bacterial membrane, thereby destroying the original structure of the bacterial membrane (Guzman et al, 2003;Suslick & Nyborg, 1990); (c) Cavitation may cause the degradation of local water, thereby deriving the antibacterial ammonia peroxide (Fedorov et al, 2022). At present, the cavitation effect of ultrasound has been extensively studied.…”

Section: The Shelf Life Of the Sterilized Thioglycollate Culture Mediummentioning

confidence: 99%

Bacterial Fabricated Ultrasonic Sterilization of Culture Media

Cutamora

2023

LJHER

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The study aimed to determine the effect of the fabricated ultrasonic device in sterilizing culture media and inactivating Escherichia coli. The study was conducted using a randomized experimental design. Thioglycollate broth applied with sonic frequencies at 50,80, and 126 kHz for 15 minutes shows the variability of absorbance readings. The findings revealed that after 15 minutes of treatment, Thioglycolate broth exposed at 80 and 126 kHz is viable to be used as a culture medium to inoculate the organism for microbial analysis, as evidenced by the comparable results of the autoclaved sample. The medium was treated at 50 kHz, and those untreated samples had higher absorbance readings than the autoclave. Sonolysis at 15 minutes of exposure impacts the inactivation of Escherichia coli at 50 kHz, 80, and 126 kHz, as seen in the decrease of the colony count at increasing sonic frequencies. The results revealed a higher mean on unsterilized plates with 126 kHz treatment, with a lesser colony count. Colony count reductions of 6%, 14%, and 29% were obtained at ultrasonic frequencies of 50 kHz, 80 kHz, and 126 kHz, respectively. The majority of the inactivation occurred at 126 kHz exposure.

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Theoretical and experimental investigation of cavitation number limits

Kuimov

2023

E3S Web of Conf.

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Cavitation remains a popular field of scientific research due to the generated effects and a wide range of possible applications. At the same time, despite the active development of technologies for treatment of liquid materials by cavitation action, the equipment used for initiation of cavitation action has not fundamentally changed. In this regard, the main direction of development of efficiency of technological processes based on cavitation impact should be the search for ways to improve the efficiency of existing equipment, which will form the basis for the development of new types of devices. For development of devices it is necessary to understand how to increase the efficiency of created cavitation in various devices. To date, in the analysis of the degree of intensity and the threshold of creation of cavitation is used dimensionless cavitation number, which due to a number of limitations is not able to fully reflect all the parameters of the process of creation of hydrodynamic cavitation. In this paper we present a theoretical and experimental study using two types of hydrodynamic cavitation generators, to assess the limitations of the dimensionless cavitation number.

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Cavitation-Based Processes for Water and Wastewater Treatment

Cited by 3 publications

References 166 publications

Investigation of the effects of cavitation on different media in a device with a discrete secondary

Investigation of the effects of cavitation on different media in a device with a discrete secondary

Bacterial Fabricated Ultrasonic Sterilization of Culture Media

Theoretical and experimental investigation of cavitation number limits

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