Lijuan Wu1, Zhigang Cai1, Jihong Li2, Jingwen Li1, Hao Pu3, Xianghong Liu4, Xixin Yan This email address is being protected from spambots. You need JavaScript enabled to view it.1

1 Department of Respiratory Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, China
2 Department of Clinical Laboratory, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, China
3 Shanghai Bingyuan Medical Technology Co., Ltd., Shanghai 201913, China
4 Shijiazhuang Aoxiang Pharmaceutical Engineering Co., Ltd., Shijiazhuang, Hebei 051431, China

Received: April 19, 2022
Revised: July 11, 2022
Accepted: August 2, 2022

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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Cite this article:

Wu, L., Cai, Z., Li, J., Li, J., Pu, H., Liu, X., Yan, X. (2022). Study on the Scavenging Effect of Steady-state Displacement Air Purification System on Indoor Bioaerosol. Aerosol Air Qual. Res.


  • Normal diagnosis and treatment in the bronchoscopy room.
  • The method of long-term, large-volume sampling is adopted.
  • The use of two microbial detection methods increased the accuracy and reliability.
  • The outdoor fresh air purification.
  • Steady-state replacement flow technology.


Many kinds of microorganisms, including the new coronavirus, can spread through aerosols. There are abundant bio-aerosols in indoor medical environment, and these aerosols are likely to cause infections among medical staff and patients in hospitals. Especially in the current severe situation of the new coronavirus, the use of a steady-state displacement air purification system may have a certain effect on reducing the spread of the new coronavirus or other microorganisms. To analyze the purification effect of the steady-state displacement air purification system on the bio-aerosols in the bronchoscope room of the hospital. In this study, the bio-aerosol in the outpatient department of the Respiratory Medicine Department of the bronchoscope room were collected during different time periods from 2021.04 to 2021.05. Among them, the microorganisms contained in the bio-aerosol are identified by NGS and microorganism culture and strain identification. During the experiment, the researcher took 5 sampling points to collect aerosols, performing NGS and microbial culture counting and identification to detect microorganisms. The total purification efficiency are 88.0% (NGS) and 87.5% (microbial culture count and identification results). The results above was statistically significant. In an occupant environment in the bronchoscope room, the steady-state displacement air purification system has a good removal effect on bio-aerosols. Such purification efficiency may have a positive effect on the control of the new coronavirus epidemic and various infectious diseases.

Keywords: Bio-aerosol, Bronchoscope room, Steady-state displacement air purification system, Indoor air

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