Study on the Scavenging Effect of Steady-state Displacement Air Purification System on Indoor Bioaerosol

Abstract

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.