3种空气消毒方法效果的比较

目的 评价3种消毒方法对空气的消毒效果。方法 分别用紫外线、戊二醛和臭氧3种消毒方法消毒空气，用3种不同的评价方法按消毒前后同步采样进行消毒效率的评价。结果 消毒前细菌本底撞击法的高峰在10：00，冲击法在9：00，平皿法在10：00；3种消毒方法之间差异有显性，按撞击法评价时戊二醛消毒率最高，消毒后3h细菌恢复率43．4％－55．8％，按冲击法评价时戊二醛效果较好，消毒后3h细菌恢复率21．8％－35．7％，按平皿沉降法评价时紫外线效果较好，消毒后3h细菌恢复率42．1％－60．6％，但相互之间差别无显性；在实验过程中，温度和相对湿度对紫外线强度略有副影响，对其它几乎无影响。结论 戊二醛消毒法和臭氧消毒法能够代替紫外线消毒法。

Study on the effects of air disinfection by three methods

Objective　To study the effects of air disinfect ion by three methods. Methods　Air was disinfected by ultraviol et rays, pentadialdchyde and ozone, efficiency of disinfection was eval uated b y three different disinfection methods using synchronous sampling after and b efo re disinfected. Results　The peak of the bacteria background by precussion method was 10 o'clock, by the ballistic method was 9 o'clock and by the petri dish method was 10 o'clock before disinfected. Three disinfect ion methods were significantly different, efficiency of disi nfection of pentadialdchyde was the highest when it was evaluated by the precuss io n method, and recovery of bacteria was 43.4%～55.8% after disinfected 3 h our s; effect of pentadialdchyde was better than that of the ballistic method, and r ecovery of bacte ria was 21.8%～35.7% after disinfected 3 hours; effect of ultra violet ra ys was better than that of the petri dish method, and recovery of bacteria was 4 2.1%～60.6% after disinfected 3 hours. But their differences were not significan t. In t he course of experiment, temperature and relative humidity have a negative impac t on the ultraviolet ray's efficiency and almost have no impact on others. Conclusions　Disinfection method of the ultraviolet rays could be rep laced by disinfection method of pentadialdchyde and ozone.