Ozone based inactivation and disinfection in the pandemic time and beyond: Taking forward what has been learned and best practice

Cai, Yamei; Zhao, Yaqian; Yadav, Asheesh Kumar; Kang, Peiying; Wei, Ting

doi:10.1016/j.scitotenv.2022.160711

Cited by 30 publications

(10 citation statements)

References 111 publications

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“…Commonly used ozone generators are generated by atmospheric pressure low-temperature plasma discharge, generally using a medium to block the plasma discharge The mechanism of action of ozone disinfection (Figure 9) is that ozone can diffuse into the surface of microbial membranes or protein shells for rapid oxidation reactions with pathogens, degrading biofilm and shell structures, and leading to loss of cytoplasm and intershell substrates. The ozone that penetrates the membrane and shell and the reactive oxygen species it generates can further attack the genetic material DNA or RNA, disrupting the structure of bacteria and viruses leading to the destruction of genetic material and inactivation of coenzymes, thus achieving disinfection [7].…”

Section: Ozone Disinfectionmentioning

confidence: 99%

Antiviral Strategies in the Treatment of Viral Infections in Humans and Animals: Surface and Space Disinfection Strategies

Wang,

Yan,

Song

2023

Infectious Diseases

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The 2019 coronavirus (COVID-19) epidemic is rampant, making people’s awareness of virus elimination and prevention gradually increase, and giving more attention to the cleanliness of the indoor air environment and the use of goods. According to the World Health Organization (WHO) estimates, the annual global influenza cases can reach 1 billion, including 3 million to 5 million severe cases, and the number of deaths from influenza-related respiratory diseases recorded is as high as 290,000 to 650,000. The virus is generally transmitted through respiratory droplet transmission, airborne transmission, and contact transmission. For most infectious diseases, disinfection, isolation, and personal protection remain the most effective means, especially in the prevention and control of influenza, intestinal infectious diseases, contact-transmitted diseases, bloodborne diseases, and sexually transmitted diseases, which are most effective in spring, such as in 2019 coronavirus, severe acute respiratory syndrome (SARS), Middle East respiratory syndrome (MERS), influenza, and other. In respiratory infectious diseases, early disinfection is an important means of prevention and control; viruses can also be transmitted by contact and through a variety of ways, which occur in indoor spaces and on the surfaces of indoor objects. As a result, many different methods of disinfection have been conducted for indoor spaces and surfaces of objects.

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Section: Ozone Disinfectionmentioning

confidence: 99%

Antiviral Strategies in the Treatment of Viral Infections in Humans and Animals: Surface and Space Disinfection Strategies

Wang,

Yan,

Song

2023

Infectious Diseases

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“…In addition, volatile organic compounds produced by microbial metabolism, endotoxins, and exotoxins caused by division and death can also be emitted. 12−14 Therefore, it is vital to treat the fibrous filter with inactivating methods such as ozone release, 15 photocatalytic oxidation, 16 and ultraviolet germicidal irradiation. 17 However, these in situ inactivation technologies equipped with filters usually take additional time and effort in practical application in HVAC systems.…”

Section: Introductionmentioning

confidence: 99%

“…Fibrous filters are commonly used for particle removal in heating, ventilating, and air conditioning (HVAC) systems. − However, microorganisms captured on filter fibers can survive and even reproduce by absorbing air moisture and nutrients from other airborne dust. − These microorganisms may potentially cause microbial release into the downstream indoor air, leading to secondary risk to human health. In addition, volatile organic compounds produced by microbial metabolism, endotoxins, and exotoxins caused by division and death can also be emitted. − Therefore, it is vital to treat the fibrous filter with inactivating methods such as ozone release, photocatalytic oxidation, and ultraviolet germicidal irradiation . However, these in situ inactivation technologies equipped with filters usually take additional time and effort in practical application in HVAC systems.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Capture and Inactivation of Airborne Bacteria by a Dual-Zone Electrostatically Actuated Filter

Xia,

Chen,

Gao

et al. 2024

ACS EST Eng.

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Maintaining indoor air quality is essential for human health, and the threat posed by bioaerosols emphasizes efficient capture and inactivation technologies in ventilation systems. However, existing technologies struggle to capture and inactivate bioaerosols simultaneously with low air resistance and integrated technologies make them inconvenient in practical applications. To address this challenge, we developed a dual-zone electrostatically actuated filter in which airborne bacteria are first charged by ions generated in the charging zone and then captured by the polarized fibers and inactivated in the electrostatic field of the polarizing zone. Benefiting from the enhanced electrostatic force, the capture efficiencies for Escherichia coli (Gram-negative) and Staphylococcus epidermidis (Gram-positive) aerosols of 0.3−0.5 μm diameter increased from ∼25.4 to ∼98.4% at 0.5 m/s filtering velocity while the air resistance was maintained at only 4.5 Pa. The capture efficiency remained steadily high for 30 days, with an average of 93.8%. Moreover, the combination of the continued ion flow and electrostatic field exposure significantly improved the inactivation efficiency against E. coli and S. epidermidis to ∼98.7 and ∼96.1%, respectively, instead of allowing bacterial reproduction on the coarse filter without electrostatic actuation. The proposed dual-zone electrostatically actuated filter exhibits great potential for incorporation into energy-saving ventilation systems, offering highefficiency capture and antimicrobial performance as well as low air resistance.

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“…Inactivation efficacy can be improved by optimizing the process conditions and combining ozone with other disinfection 19, 20. For instance, the Chick‐Watson model can describe the inactivation kinetics of total coliforms in wastewater ozonation.…”

Section: Introductionmentioning

confidence: 99%

Optimizing the Disinfection Inactivation Efficiency in Wastewater Treatment: A Computational Fluid Dynamics Investigation of a Full‐Scale Ozonation Contactor

Elaissaoui Elmeliani,

Aguedal,

Iddou

et al. 2023

Chem Eng & Technol

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The inactivation kinetics of total coliforms to increase the pathogenic removal efficiency in a full‐scale ozonation contactor in a wastewater treatment plant in Algeria is investigated. An enhanced ozone contactor design is proposed and 3D multiphase computational fluid dynamics simulations were conducted to optimize the operating parameters, including flow rates, ozone concentrations considering the treatment performance, and total operating cost. The existing design has several limitations, including poor mass‐transfer efficiency and uneven distribution of dissolved ozone. To address these issues, the optimized design includes new injection‐point settings and an increased number of diffusers. The optimized design achieved a significant improvement in mass transfer efficiency. The ozone treatment effectively reduced the total coliform counts in the wastewater samples compared to the existing design. The Chick‐Watson model predicted inactivation kinetics, with a reduction of up to 99.997 %. The practical implications of this research can significantly improve the inactivation kinetics of ozone treatments.

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Ozone based inactivation and disinfection in the pandemic time and beyond: Taking forward what has been learned and best practice

Cited by 30 publications

References 111 publications

Antiviral Strategies in the Treatment of Viral Infections in Humans and Animals: Surface and Space Disinfection Strategies

Antiviral Strategies in the Treatment of Viral Infections in Humans and Animals: Surface and Space Disinfection Strategies

Simultaneous Capture and Inactivation of Airborne Bacteria by a Dual-Zone Electrostatically Actuated Filter

Optimizing the Disinfection Inactivation Efficiency in Wastewater Treatment: A Computational Fluid Dynamics Investigation of a Full‐Scale Ozonation Contactor

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