Design and construction of a low cost air purifier for killing harmful airborne microorganisms using a combination of a strong multi-directional electric-field and an ultra violet light

Jayakantha, D. N. P. Ruwan; Bandara, H.M.N.; Gunawardana, Nadeesha M.; Rajapakse, Jayanthe; Thilakarathne, Dulari S.; Comini, Elisabetta; Gunawardhana, Nanda; Karunarathne, Sumedhe

doi:10.1016/j.ohx.2022.e00279

Cited by 5 publications

(7 citation statements)

References 26 publications

(22 reference statements)

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“…Combined HEPA and UVGI, air cleaning technologies could effectively remove airborne pathogens (304,305). Air purifiers or cleaners based on ionization, electrostatic precipitation, cold plasma generation, and photocatalytic oxidation are emerging technologies (216,255,(306)(307)(308)(309). However, currently, no single technology can sufficiently achieve "cleaner" indoor air.…”

Section: Air Cleaners and Purifiersmentioning

confidence: 99%

A comprehensive review of microbial contamination in the indoor environment: sources, sampling, health risks, and mitigation strategies

Chawla,

Anand,

Garg

et al. 2023

Front. Public Health

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The quality of the indoor environment significantly impacts human health and productivity, especially given the amount of time individuals spend indoors globally. While chemical pollutants have been a focus of indoor air quality research, microbial contaminants also have a significant bearing on indoor air quality. This review provides a comprehensive overview of microbial contamination in built environments, covering sources, sampling strategies, and analysis methods. Microbial contamination has various origins, including human occupants, pets, and the outdoor environment. Sampling strategies for indoor microbial contamination include air, surface, and dust sampling, and various analysis methods are used to assess microbial diversity and complexity in indoor environments. The review also discusses the health risks associated with microbial contaminants, including bacteria, fungi, and viruses, and their products in indoor air, highlighting the need for evidence-based studies that can relate to specific health conditions. The importance of indoor air quality is emphasized from the perspective of the COVID-19 pandemic. A section of the review highlights the knowledge gap related to microbiological burden in indoor environments in developing countries, using India as a representative example. Finally, potential mitigation strategies to improve microbiological indoor air quality are briefly reviewed.

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Section: Air Cleaners and Purifiersmentioning

confidence: 99%

A comprehensive review of microbial contamination in the indoor environment: sources, sampling, health risks, and mitigation strategies

Chawla,

Anand,

Garg

et al. 2023

Front. Public Health

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“…Jayakantha et al [55] designed an air purifier using UV light and an electric field. The results showed that UV radiation alone was ineffective in reducing bacterial counts, the electric field alone resulted in a significant reduction, and the combination of UV radiation and the electric field significantly reduced bacterial counts.…”

Section: Included Articlesmentioning

confidence: 99%

“…Among the experimental studies [1,2,[12][13][14]17,22,23,25,29,31,40,43,44,46,48,49,52,[54][55][56][57][60][61][62][63][64]70,71], three [12,13,23] performed tests in work or everyday living environments, while [1,2,15,29,48,49,54,56,60,70] performed tests in test chambers. Some papers [14,17,25,43,44,52,[62][63][64]…”

Section: Experimental Workmentioning

confidence: 99%

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A Systematic Review on the Application of Ultraviolet Germicidal Irradiation to HVAC Systems

Cattai,

D’Orazio,

Sbardella

2023

Energies

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With the renewed focus on indoor air quality (IAQ) due to “Sick building syndrome” and the recent COVID-19 pandemic, the availability of innovative components and innovative guidance for maintenance and systemic safety design will play an important role, with HVAC systems as protagonists. UV-C irradiation has been investigated for a long time, and some system solutions are known. The aim of this work is to provide an overview of the latest outcomes related to the innovative components of HVAC systems using UV-C irradiation and investigate the current state of the art. A procedure based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement was adopted, and the Scopus database was used to query the relevant literature. A total of 66 publications qualified for inclusion in the survey: 29 articles report experimental investigations, 24 articles are related to numerical or theoretical analysis, and both approaches were used in 13 articles. Many papers deal with upper-room UVGI, AHUs, and ducts. A few papers analyse mobile devices. The evaluation of the dose, as in the case of the definition of irradiance, is reported in a small number of articles. This lack of information makes the scenario imprecise and non-quantitative.

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“…The employment of an electric field with a UV light to destroy airborne germs is discussed in this work [1]. The combination of UV light and a high electric field creates the ideal air cleaner since the high electric field is more effective at killing bacteria.…”

Section: Introductionmentioning

confidence: 99%

Cost-Effective Automatic Portable Air Purifier

Deekshitha Arasa

2024

jes

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Indoor air pollution has become a severe concern on human health due to improper ventilation, pets and fine dust particles. The demand for efficient air purifiers has surged, yet many existing solutions are generally pricey and lack portability. The suggested air purifier uses modern filtration technologies, including activated carbon filters, to remove a wide range of airborne contaminants, such as dust, allergies, pet hair, and volatile organic compounds (VOCs). By adopting a tiny and lightweight design, the purifier offers outstanding portability, enabling customers to experience clean and fresh air wherever they go. The proposed air purifier possesses a distinctive design that integrates a high electric field generator and UV light source. The high electric field technique effectively accumulates and neutralizes airborne particles, including dust, pollen, mold spores, and germs. Simultaneously, the UV light component kills dangerous microbes, such as viruses and bacteria, by breaking their DNA structure, offering cleaner and healthier air. To achieve best performance and energy economy the air purifier adopts an automated operation mode. The device operates only upon the detection of motion a human being.

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Design and construction of a low cost air purifier for killing harmful airborne microorganisms using a combination of a strong multi-directional electric-field and an ultra violet light

Cited by 5 publications

References 26 publications

A comprehensive review of microbial contamination in the indoor environment: sources, sampling, health risks, and mitigation strategies

A comprehensive review of microbial contamination in the indoor environment: sources, sampling, health risks, and mitigation strategies

A Systematic Review on the Application of Ultraviolet Germicidal Irradiation to HVAC Systems

Cost-Effective Automatic Portable Air Purifier

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