基于功能催化剂的多因子消毒器对微生物气溶胶消毒效果

Effect of Multi-factor Sterilizer on Microbial Aerosol Disinfection Based on Functional Catalyst

目的:利用空气消毒器能有效控制病原微生物在空气中的传播,但催化剂添加及多因子协同消杀的必要性及效果尚不明晰。方法:利用多因子消毒器,以白色葡萄球菌为指示菌,在30 m3标准试验舱开展了臭氧、紫外线、臭氧催化、紫外光催化、HEPA过滤等单一消杀因子及多因子协同消杀气溶胶中微生物的研究。结果:分别添加臭氧催化剂、光催化剂较单一臭氧、紫外线消杀率提高12.9%和11.33%;在多因子消杀中,协同臭氧催化-紫外光催化-HEPA过滤的多因子消杀较单一因子消杀率分别提高10.58%、36.37%、53.67%。此外,随着相对湿度从40%增加至80%,臭氧消杀率提高3.67%,而紫外线消杀率下降6.76%;随着设备风速由1.1 m/s增加到1.9 m/s,臭氧、紫外线、HEPA过滤的消杀率分别提高2.95%、8.08%和46.09%;臭氧发生量由5 g/h提高至10 g/h时,消杀率提高12.87%。结论:催化剂添加及多因子协同能提升消毒器的消杀效率,环境相对湿度、消毒器风速等因素会显著影响消毒器消毒效果。

Objective:Using air sterilizer can effectively control the spread of pathogenic microorganism in the air.However,the necessity and effect of catalyst addition and multi-factor synergistic disinfection are still unclear.Methods:Using a multi-factor sterilizer and staphylococcus albus as indicator bacteria,the study of single sterilizing factor such as ozone,ultraviolet,ozone catalysis,ultraviolet photocatalysis,HEPA filters and multi-factor synergistic of microorganisms in aerosol was carried out in 30 m3 standard laboratory.Results:Compared with single ozone and ultraviolet,the disinfection rates of ozone catalyst and ultraviolet catalyst were increased by 12.9%and 11.33%.The multi-factor disinfection rate of synergistic ozone catalysis,ultraviolet photocatalysis and HEPA filters increase by 10.58%,36.37%and 53.67%,compared with that of single factor.In addition,as the relative humidity increased from 40%to 80%,the ozone disinfection rate increased by 3.67%,while the UV disinfection rate decreased by 6.76%.As the wind speed of the equipment increased from 1.1 m/s to 1.9 m/s,the disinfection rates of ozone,ultraviolet and HEPA filters increased by 2.95%,8.08%and 46.09%,respectively.When ozone generation increase from 5 g/h to 10 g/h,the disinfection rate increased by 12.87%.Conclusions:Multi-factor synergy and catalysts addition can significantly improve the disinfection efficiency of sterilizer,and factors such as environmental relative humidity and wind speed of the sterilizer will significantly affect the disinfection effect of the sterilizer.