Investigation of inactivation process for microorganism collected in an electrostatic precipitator

Zukeran, Akinori; Sawano, Hidetoshi; Ito, Kohei; Oi, Ryo; Kobayashi, Iori; Wada, Risei; Sawai, Jun

doi:10.1016/j.elstat.2018.04.002

Cited by 19 publications

(8 citation statements)

References 10 publications

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“…Airborne ozone at a concentration of 0.1 ppm has been reported to disinfect microorganisms in the indoor environment (Han, Thomas, and Mainelis 2017;Zukeran et al 2018). The ozone generated in our device was found to be 0.4 ± 0.05 ppm/min.…”

Section: Bacterial Inactivation In Electrostatic Precipitationmentioning

confidence: 65%

“…the loss of viability under a given electrostatic precipitation condition was tested for the spores/cells collected by the device at two different electric field strengths of 3 and 8 kV/cm. The viability tests were done using a cultivation-based technique reported in the literature (Mainelis et al 2002;Yao, Mainelis, and An 2005;Zukeran et al 2018) and by the live/dead staining methods (Murata and Zhang 2013;Emerson et al 2017). The viable states of the Btk cells/spores recovered (using sterile swab) from the precipitator region was determined by counting the number of colony forming units (CFUs) grown on the trypticase soy agar (TSA) plates and comparing this number with the number of viable Btk spores/cells entering the device.…”

Section: Experimental Set Up For Performance Evaluationlab Testmentioning

confidence: 99%

“…As shown in Figure 8c, the inactivation rates for both the cells and spores ranged from 95% to 99%, with the inactivation rates being slightly higher for the cells. The reasons for the inactivation of the bacterial cells and spores are likely a combination of (i) electroporation of the cells/spores upon exposure to electric field (Garcia et al 2016;Pillet et al 2016) and (ii) ozone or reactive oxygen species formation in the ionizer through corona discharge, leading to cell inactivation (Han, Thomas, and Mainelis 2017;Zukeran et al 2018). Previous studies have shown that when a pulsed electric field was applied to a bacterial suspension, cell death resulted from disruption of plasma membrane due to increased trans-membrane voltage (TMV).…”

Section: Bacterial Inactivation In Electrostatic Precipitationmentioning

confidence: 99%

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Design and evaluation of a new electrostatic precipitation-based portable low-cost sampler for bioaerosol monitoring

Priyamvada

Kumaragama

Chrzan

et al. 2020

Aerosol Science and Technology

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The importance of bioaerosols to human and ecosystem health is evident as we tackle the ongoing coronavirus pandemic. Understanding the airborne migration of pathogens and the consequent transmission of diseases such as COVID-19 requires an ability to monitor bioaerosols at high spatio-temporal resolution. For such monitoring, there is an immediate need for bioaerosol samplers that are easy to deploy and optimized for downstream analysis. In this study, we introduce a small, inexpensive, low-power, and a low-pressure drop device, called TracB, that integrates low-cost aerosol sensing with bioaerosol sampling using electrostatic precipitation technique. The device was designed for an efficient collection of particles in the size range of 0.01-10 mm, making it suitable for a wide range of downstream microbial analysis. A low-cost particle charger has been integrated with the device to improve the collection efficiency of the sampled particles. The performance of the device was tested with Bacillus thuringiensis var. kurtsaki (Btk) as the biological test organism for different operating conditions. The ability of the device to efficiently collect bio-particles when the charger was oriented parallel to the particle flow was confirmed with computational fluid dynamics simulations. Over 50% of biological and nonbiological test particles were collected in the device when operated with an ionizer and a precipitation electric field of 8 kV/ cm. Our results demonstrate the potential of the device to be used as an autonomous unit suitable for long-term air sampling at diverse indoor and outdoor locations.

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Section: Bacterial Inactivation In Electrostatic Precipitationmentioning

confidence: 65%

Section: Experimental Set Up For Performance Evaluationlab Testmentioning

confidence: 99%

Section: Bacterial Inactivation In Electrostatic Precipitationmentioning

confidence: 99%

See 1 more Smart Citation

Design and evaluation of a new electrostatic precipitation-based portable low-cost sampler for bioaerosol monitoring

Priyamvada

Kumaragama

Chrzan

et al. 2020

Aerosol Science and Technology

View full text Add to dashboard Cite

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“…However, such samplers are still subject to some problems: ozone and ROS emissions, low collection efficiency at high flow rates and/or small collection areas, charger degradation during the sampling process, and difficulty in charging nanometer-sized particles. ROS emission is an important issue and can inactivate microorganisms collected on the electrostatic sampler ( Bhardwaj et al, 2020 , Zukeran et al, 2018 ). The U. S. Food and Drug Administration (FDA) requires that ozone emission should be lower than 50 parts per billion ( Han et al, 2017 ).…”

Section: Air Samplersmentioning

confidence: 99%

Recent advancements in the measurement of pathogenic airborne viruses

Bhardwaj

Hong

Jang

et al. 2021

Journal of Hazardous Materials

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Air-transmissible pathogenic viruses, such as influenza viruses and coronaviruses, are some of the most fatal strains and spread rapidly by air, necessitating quick and stable measurements from sample air volumes to prevent further spread of diseases and to take appropriate steps rapidly. Measurements of airborne viruses generally require their collection into liquids or onto solid surfaces, with subsequent hydrosolization and then analysis using the growth method, nucleic-acid-based techniques, or immunoassays. Measurements can also be performed in real time without sampling, where species-specific determination is generally disabled. In this review, we introduce some recent advancements in the measurement of pathogenic airborne viruses. Air sampling and measurement technologies for viral aerosols are reviewed, with special focus on the effects of air sampling on damage to the sampled viruses and their measurements. Measurement of pathogenic airborne viruses is an interdisciplinary research area that requires understanding of both aerosol technology and biotechnology to effectively address the issues. Hence, this review is expected to provide some useful guidelines regarding appropriate air sampling and virus detection methods for particular applications.

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“…Ozone has two characteristics, and the favorable characteristic is its strong oxidization, which can be used for bacterial inactivation [155,210], food storage [211][212][213], disinfection [214] and wastewater treatment [215]. The other detrimental characteristic of ozone is that it can damage the human respiratory system, causing lung diseases or inflammation of the respiratory mucosa.…”

Section: Ozone Generationmentioning

confidence: 99%

A review on recent advances and challenges of ionic wind produced by corona discharges with practical applications

Qu¹,

Zeng²,

Zhang³

et al. 2021

J. Phys. D: Appl. Phys.

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Ionic wind, an induced phenomenon during corona discharge, possessing the features of silent operation and no moving parts, has a wide range of applications. Ionic wind generation is accompanied by complex physical processes, involving gas ionization, ion recombination, flow, and various chemical reactions, as well as mutual couplings between some of them. Therefore, understanding the corona discharge process and ionic wind generation is crucial for researchers and engineers to better utilize this phenomenon in practical applications. In this review, the principles of corona discharge and its induced ionic wind are presented. Subsequently, ionic wind generators (IWGs) are discussed according to their applications, and the corresponding advances based on experimental studies and numerical simulations are also reviewed. Moreover, the challenges of transitioning the ionic wind technology from laboratory studies to practical applications are discussed. These challenges include the excessively high onset voltage of the corona, ozone emission, and influence of environmental conditions. Furthermore, the mechanisms of these barriers and several effective approaches for mitigating them are provided. Finally, some future research prospects and the conclusions are presented.

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Investigation of inactivation process for microorganism collected in an electrostatic precipitator

Cited by 19 publications

References 10 publications

Design and evaluation of a new electrostatic precipitation-based portable low-cost sampler for bioaerosol monitoring

Design and evaluation of a new electrostatic precipitation-based portable low-cost sampler for bioaerosol monitoring

Recent advancements in the measurement of pathogenic airborne viruses

A review on recent advances and challenges of ionic wind produced by corona discharges with practical applications

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