65台家用空气净化器过滤膜细菌污染状况及净化效果分析

发布时间：2018-03-01 18:49

本文关键词： 空气净化器细菌净化效果　出处：《现代预防医学》2017年22期 　论文类型：期刊论文

【摘要】：目的调查居民家庭HEPA型空气净化器的基本情况、过滤膜细菌污染状况和空气细菌净化效果,为指导居民合理使用空气净化器提供依据。方法问卷法调查空气净化器的基本情况和使用习惯;拭子涂抹法采集过滤膜前后的细菌并进行检测,全自动微生物生化系统进行细菌鉴定;空气沉降法采集空气微生物并进行检测。结果本次研究共调查65台HEPA型空气净化器。过滤膜上的细菌鉴定出56种,17个属别。过滤膜前细菌总数中位数为8.8 CFU/cm2,膜后为0.4 CFU/cm2,差异有统计学意义(Z=-5.264,P0.001),且两者呈正相关(r=0.357,P=0.004)。空气净化器开启前室内空气细菌总数中位数为5.5CFU/皿,开启后为3.0CFU/皿,差异有统计学意义(Z=-3.826,P0.001)且两者呈正相关(r=0.590,P0.001)。经偏相关分析,过滤膜前细菌总数与空气细菌总数正相关(r=0.501,P0.001)。结论过滤膜上细菌种类繁多,膜前细菌污染情况严重于膜后;78.3%的空气净化器可以有效降低室内空气中的微生物数量,但二次污染问题不容忽视;过滤膜前表面细菌数量与空气细菌总数正相关。
[Abstract]:Objective to investigate the basic situation of HEPA type air purifier, the bacterial contamination of filtration membrane and the effect of air bacteria purification. In order to guide the residents to use air purifier reasonably, the basic situation and usage habits of air purifier were investigated by questionnaire method, and the bacteria before and after filtration membrane were collected and detected by swabbing method. Automatic microbial biochemistry system for bacteria identification; Results in this study, 65 HEPA air purifiers were investigated. 56 species of bacteria were identified on the membrane, 17 genera were identified. The median number of bacteria before filtration membrane was 8.8 CFU / cm ~ 2, and the number of bacteria on membrane was 8. 8 CFU / cm ~ 2. It was 0.4 CFU / cm ~ (2), the difference was statistically significant, and there was a positive correlation between the two. The median of bacteria in indoor air before the air purifier was opened was 5.5 CFU / dish, and there was a positive correlation between the two. After opening it was 3.0 CFU / dish, and the difference was statistically significant (P 0.001) and there was a positive correlation between them. By partial correlation analysis, it was found that there was a positive correlation between the total number of bacteria before filtration and the total number of bacteria in air. Conclusion there are many kinds of bacteria on filtration membrane. The contamination of pre-membrane bacteria was more serious than that of air purifier after membrane, but the secondary contamination could not be ignored, and the number of bacteria on the surface of membrane filter was positively correlated with the total number of bacteria in the air.
【作者单位】：北京市朝阳区疾病预防控制中心;
【分类号】：R122.2

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