重庆市地铁车厢空气微生物污染状况调查

发布时间：2018-08-06 15:24

【摘要】：目的了解重庆市地铁车厢内不同季节空气中主要微生物的污染状况,为疾病预防和卫生监督提供科学依据。方法分别于2014年4、7、11月及2015年1月对重庆市地铁1、3号线车厢各进行1次细菌总数、溶血性链球菌菌落总数、温度、相对湿度等检测,同时监测客流量。每月连续检测3 d,每日分上午、下午2个时段,对每列车的前、中、后3段各抽取1节车厢进行检测。结果地铁1号线和3号线春、夏、秋、冬四季的细菌总数合格率分别为100%(144/144),97.92%(141/144),100%(144/144),100%(144/144)。细菌总数在夏季最高,为(15.14±1.42)CFU/皿;冬季最低,为(10.92±1.57)CFU/皿。多重线性回归分析结果显示,车厢内的细菌总数与车厢内温度、客流量呈正相关(P0.05),细菌总数随着温度、客流量的增加而升高;车厢内的细菌总数与时间呈负相关(P0.05),下午时的细菌总数少于上午。结论本次调查的地铁车厢内的空气质量主要与季节、客流量、温度有关,建议加强空调系统日常卫生管理。
[Abstract]:Objective to investigate the pollution of main microorganisms in the air in different seasons of subway cars in Chongqing, and to provide scientific basis for disease prevention and hygiene supervision. Methods the total number of bacteria, total bacterial count, temperature and relative humidity of streptococcus haemolyticus were detected once in line 1 and 3 of Chongqing Metro in 2014, November and January, 2015, respectively, and the passenger flow was monitored at the same time. For 3 consecutive days each month, every day is divided into morning and afternoon. One carriage is extracted from the front, middle and rear parts of each train. Results the qualified rates of bacterial count in spring, summer, autumn and winter on Line 1 and Line 3 were 100% (144 / 144), 97. 92% (141 / 144) and 100% (144 / 144) respectively. The total bacterial count was (15.14 卤1.42) CFU/ dish in summer and (10.92 卤1.57) CFU/ dish in winter. The results of multiple linear regression analysis showed that the total number of bacteria in the compartment was positively correlated with the temperature and the volume of passengers (P0.05), and the total number of bacteria increased with the increase of temperature and volume of passengers. The total number of bacteria in the car was negatively correlated with time (P0.05), and the total number of bacteria in the afternoon was less than that in the morning. Conclusion the air quality of subway cars investigated in this paper is mainly related to season, passenger flow and temperature. It is suggested to strengthen the daily hygiene management of air conditioning system.
【作者单位】：重庆医科大学公共卫生与管理学院;重庆医科大学实验教学管理中心公共卫生实验教学中心;
【分类号】：R128.1

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