刘萍, 张峰, 马金龙, 吴小燕, 刘心苗. 西安市地铁2号线运营前集中空调系统微生物污染状况[J]. 环境与职业医学, 2013, 30(8): 616-618.
引用本文: 刘萍, 张峰, 马金龙, 吴小燕, 刘心苗. 西安市地铁2号线运营前集中空调系统微生物污染状况[J]. 环境与职业医学, 2013, 30(8): 616-618.
LIU Ping , ZHANG Feng , MA Jin-long , WU Xiao-yan , LIU Xin-miao . Microbial Contamination in Pre-Operational Central Air Conditioning Systems of Metro Line 2 in Xi'an[J]. Journal of Environmental and Occupational Medicine, 2013, 30(8): 616-618.
Citation: LIU Ping , ZHANG Feng , MA Jin-long , WU Xiao-yan , LIU Xin-miao . Microbial Contamination in Pre-Operational Central Air Conditioning Systems of Metro Line 2 in Xi'an[J]. Journal of Environmental and Occupational Medicine, 2013, 30(8): 616-618.

西安市地铁2号线运营前集中空调系统微生物污染状况

Microbial Contamination in Pre-Operational Central Air Conditioning Systems of Metro Line 2 in Xi'an

  • 摘要: 目的 掌握西安市地铁2 号线运营前集中空调通风系统的微生物污染状况,为地铁的环境监测提供基线数据。

    方法 对西安市16 个地铁站点站台、站厅层的空调通风系统进行监测,每个站点连续监测3 d,每天上、下午各1 次。监测项目包括空调送风及风管内表面的菌落总数、β-溶血性链球菌、真菌及空调冷却水、冷凝水的嗜肺军团菌。

    结果 检测的16 个地铁站空调系统风管内表面及空调送风中的真菌总数合格率分别为44.7%、59.4%;风管内表面及空调送风中的菌落总数合格率分别为100.0%、96.9%;风管内表面及空调送风中未检出β-溶血性链球菌。检测了空调系统冷却水、冷凝水各32 份,其中嗜肺军团菌阳性率分别为28.1%、0%,差异有统计学意义(P<0.05)。站厅、站台送风中真菌总数均值分别为413、625 cfu/m3,差异有统计学意义(P<0.01);站厅、站台风管内表面真菌总数分别为620、527 cfu/m3,差异无统计学意义(P<0.01)。站台、站厅其他检测项目差异亦无统计学意义(P>0.05)。

    结论 西安市地铁2 号线空调系统细菌水平尚可,存在一定程度的真菌污染。建议相关部门加强对地铁站空调系统的监测工作。

     

    Abstract: Objective To collect the background date of microbial contamination of the air conditioning systems of metro line 2 before operation for future monitoring.

    Methods The central air conditioning systems of 16 metro stations were monitored for 3 consecutive days, twice a day, morning and afternoon. The monitoring indicators included total bacterial count, β-hemolytic streptococcus, and total fungi on the inner surface of duct and in wind duct, as well as Legionella pneumophila in cooling and condensate water.

    Results The qualification rates on the inner surface of duct and in wind duct were 44.7% and 59.4% for the total fungi, and 100.0% and 96.6% for the total bacterial count, respectively. No β-hemolytic streptococcus was detected. Of the 32 samples of cooling water and condensate water detected, the positive rate of Legionella pneumophila were 28.1% and 0%, respectively (P<0.05). The mean of total fungi in wind duct of station concourses and platforms were 413 cfu/m3 and 625 cfu/m3, respectively (P<0.01), and those on the inner surface of duct were 620 cfu/m3 and 527 cfu/m3, respectively (P<0.01). There were no statistical differences in other indicators between platforms and concourses (P>0.05).

    Conclusion The bacteria levels in central air conditioning systems of metro line 2 in Xi'an are well within the accepted limits, but fungi contamination is found. It is suggested that related departments strengthen surveillance on the air conditioning systems of metro stations.

     

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