2015年河北省公共场所集中空调通风系统污染情况分析

Analysis on pollution of central air conditioning and ventilation system in public places in Hebei in 2015

目的了解河北省集中空调通风系统卫生状况,发现公共场所集中空调卫生检测中存在的问题。方法全省共抽检90家公共场所集中空调通风系统,检测集中空调通风系统冷却水中的嗜肺军团菌、送风中溶血性链球菌、风管内表面积尘量、风管内表面细菌总数和风管内表面真菌总数。结果冷却水中未检测到军团菌,送风中溶血性链球菌检出率高达13.3%,风管内表面积尘量、风管内表面细菌总数和风管内表面真菌总数总合格率分别96.4%、95.5%和99.2%。结论 2015年河北省公共场所集中空调通风系统溶血性链球菌污染严重,应加强集中空调系统的清洗消毒。

Objective To learn the hygiene status of central air conditioning ventilation system in Hebei province and find the existing problems in hygiene detection in public places. Methods A total of 90 central air conditioning ventilation systems in public places were sampled. Legionella pneumophila in cooling water, hemolytic streptococcus in the supply air, accumulated dust, total bacteria, and total fungi on the internal surface of ventilation ducts were detected. Results Legionella pneumophila was not detected in cooling water but the detection rate of hemolytic streptococcus in the supply air was 13.3%. The qualified rates of accumulated dust, total bacteria, and total fungi on the internal surface of ventilation ducts were 96.4%, 95.5% and 99.2%, respectively. Conclusion There are some problems in the health status of centralized air conditioning ventilation system in public places in Hebei province, wherein hemolytic streptococcus contamination severe.