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Evaluation of an Air Cleaning Device Equipped with Filtration and UV: Comparison of Removal Efficiency on Particulate Matter and Viable Airborne Bacteria in the Inlet and Treated Air

Author

Listed:
  • Peiyang Li

    (Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA)

  • Jacek A. Koziel

    (Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA
    Livestock Nutrient Management Research Unit, USDA-ARS Conservation & Production Research Laboratory, Bushland, TX 79012, USA)

  • Nubia Macedo

    (Department of Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA 50011, USA)

  • Jeffrey J. Zimmerman

    (Department of Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA 50011, USA)

  • Danielle Wrzesinski

    (Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA)

  • Erin Sobotka

    (Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA)

  • Mateo Balderas

    (Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA)

  • William B. Walz

    (Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA)

  • Reid Vincent Paris

    (Department of Statistics, Iowa State University, Ames, IA 50011, USA)

  • Myeongseong Lee

    (Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA
    Department of Animal Science, Texas A&M University, College Station, TX 77843, USA)

  • Dongjie Liu

    (Department of Biomedical Sciences, Iowa State University, Ames, IA 50011, USA)

  • Bauyrzhan Yedilbayev

    (Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA
    Department of Geography and Environmental Sciences, al-Farabi Kazakh National University, Almaty 050040, Kazakhstan)

  • Brett C. Ramirez

    (Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA)

  • William S. Jenks

    (Department of Chemistry, Iowa State University, Ames, IA 50011, USA)

Abstract

Since the COVID-19 pandemic, improving indoor air quality (IAQ) has become vital for the public as COVID-19 and other infectious diseases can transmit via inhalable aerosols. Air cleaning devices with filtration and targeted pollutant treatment capabilities can help improve IAQ. However, only a few filtration/UV devices have been formally tested for their effectiveness, and little data is publicly available and UV doses comparable. In this research, we upgraded a particulate matter (PM) air filtration prototype by adding UV-C (germicidal) light. We developed realistic UV dose metrics for fast-moving air and selected performance scenarios to quantify the mitigation effect on viable airborne bacteria and PM. The targeted PM included total suspended particulate (TSP) and a coarse-to-fine range sized at PM 10 , PM 4 , PM 2.5 , and PM 1 . The PM and viable airborne bacteria concentrations were compared between the inlet and outlet of the prototype at 0.5 and 1.0 m 3 /s (low and high) air flow modes. The upgraded prototype inactivated nearly 100% of viable airborne bacteria and removed up to 97% of TSP, 91% of PM 10 , 87% of PM 4 , 87% of PM 2.5 , and 88% of PM 1 . The performance in the low flow rate mode was generally better than in the high flow rate mode. The combination of filtration and UV-C treatment provided ‘double-barrier’ assurance for air purification and lowered the risk of spreading infectious micro-organisms.

Suggested Citation

  • Peiyang Li & Jacek A. Koziel & Nubia Macedo & Jeffrey J. Zimmerman & Danielle Wrzesinski & Erin Sobotka & Mateo Balderas & William B. Walz & Reid Vincent Paris & Myeongseong Lee & Dongjie Liu & Bauyrz, 2022. "Evaluation of an Air Cleaning Device Equipped with Filtration and UV: Comparison of Removal Efficiency on Particulate Matter and Viable Airborne Bacteria in the Inlet and Treated Air," IJERPH, MDPI, vol. 19(23), pages 1-23, December.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:23:p:16135-:d:991484
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