南宁轨道交通2号线地铁站运营前集中空调通风系统的卫生状况

Hygiene quality of central air conditioning ventilation system in metro stations of Nanning Rail Transit Line 2 before commercial operation

目的 调查南宁轨道交通2号线地铁站运营前集中空调通风系统的卫生状况。方法 在南宁轨道交通2号线运营前,根据《公共场所集中空调通风系统卫生规范》要求,在16个车站同类型的集中空调通风系统中随机抽取1套,检测其送风、风管内表面、新风量、冷凝水和冷却水的卫生状况。结果 16个车站中,集中空调通风系统送风中可吸入颗粒物(PM10)、β-溶血性链球菌、人均新风量、风管内表面积尘量、细菌总数、真菌总数、集中空调系统冷凝水和冷却水中嗜肺军团菌指标均符合卫生标准要求,但其中13个车站(81.3%)集中空调通风系统送风中细菌总数和真菌总数均不符合卫生标准要求。结论 南宁轨道交通2号线地铁站运营前集中空调系统卫生状况不佳,存在微生物污染的风险。

Objective To investigate the hygiene quality of central air conditioning ventilation system in metro stations of Nanning Rail Transit Line 2 before commercial operation. Methods According to Hygienic Specification of Central Air Conditioning Ventilation System in Public Buildings ,a set of central air conditioning ventilation system was randomly selected from the systems of the same type in 16 stations before commercial operation of Nanning Rail Transit Line 2,to detect the hygienic condition of air supply,air duct surface,fresh air volume,condensate and cooling water. Results Among the 16 stations,inhalable particulate matter(PM 10 ),β-hemolytic Streptococcus ,fresh air volume per capita in central air conditioning ventilation system,dust accumulation,total bacteria count and total fungi count on the inner surface of air duct,and Legionella pneumophila in condensate and cooling water of central air conditioning ventilation system all conformed the hygienic standard,however,in the 13(81.3%) metro stations,the levels of total bacteria count and total fungi count of airflow did not meet the hygienic standard in the air supply of central air conditioning ventilation system. Conclusion The hygiene quality of central air conditioning ventilation system is poor in metro stations of Nanning Rail Transit Line 2 before commercial operation,having a risk of microbial contamination.