Abstract
In this research, high voltage static electricity and ultraviolet technologies were integrated to an air purifying device which can be used to trap and kill airborne bacteria and viruses in central air-conditioning systems. An experimental platform was built to mimic the central air system, in which the efficacy of the newly built device was examined. In addition to the standard physical and chemical tests, bacteriophages were used to simulate airborne viruses in the experimental system. The bacteriophage suspension was aerosolized into the air with ultrasonic wave atomization. The result showed that more than 86% removal efficiency of micro-particles (<10 micron in diameter) were removed after the device was in operation in a building and more than 95% of bacteriophages in the experimental system. It is concluded that the integrated air purifier is suitable for controlling air quality and preventing virus transmission through the central air system.
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References
Kamps, B. S., Hoffmann, C., SARS Reference, Germany, Flying Publisher, 2003, 5: 9–17.
Jiang, Y., Emergency measures in HVAC systems against SARS, Heating Ventilation & Air Conditioning & SARS, 2003, 33: 41–46.
Zhang, Y. P., Zhao, B., Cheng, T. B. et al., Overview of disinfection methods of biologic pollution in HVAC systems, Heating Ventilation & Air Conditioning & SARS, 2003, 33: 41–46.
Shi, Y. L., Stochastic dynamic model of SARS spreading, Chinese Science Bulletin, 2003, 7, 48(13): 1287–1292.
Liu, Z. M., Zhang, Z. R., Xu, G. W. et al., Catalytic materials evaluated by adsorption and inactivation of parainfluenza virus cytotoxicity of mammalian cells, Chinese Journal of Catalysis, 2003, 24(5): 323–327.
Mizuno, A., Hori, Y., Destruction of living cells by pulsed highvoltage application, IEEE Trans. Industry Application, 1988, 24(3): 387–394.
Qin, B. L., Barbosa-Canovas, G. V., Swanson, B. G. et al., A continuous treatment system for inactivating microorganisms with pulsed electric fields, 30th IAS Annual Meeting, IAS’95, Industry Applications Conference, 1995, 2: 1345–1352.
Standard Test Method for Resistance of Materials Used in Protective Clothing to Penetration by Blood-Borne Pathogens Using Phi-X174 Bacteriophage Penetration as a Test System, ASTM F1671-97b, Jan. 1, 1997.
Nie, X. L., Cao, J. C., Ding, R., An experiment study of cylinder-shaped HEPA filter, Contamination Control & Air-conditioning Technology, 2003(1): 42–45.
Xu, Z. L., The Theory of Air-Cleaning Technology, Shanghai: Tongji University Press, 1998,4: 130–136.
ASHRAE Applications Handbooks (SI), Chapter 7: Health Care Facilities, 1999.
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Zheng, X., Li, K., Wang, R. et al. Experimental investigation of integrated air purifying technology for bioaerosol removal and inactivation in central air-conditioning system. Chin.Sci.Bull. 49, 306–310 (2004). https://doi.org/10.1007/BF03182817
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DOI: https://doi.org/10.1007/BF03182817