广州市荔湾区集中空调系统冷却水塔铜绿假单胞菌污染状况

Pseudomonas Aeruginosa Contamination in Cooling Tower of Central Air Conditioning System in Liwan District of Guangzhou City

目的了解集中空调冷却水塔铜绿假单胞菌污染状况,为铜绿假单胞菌的防控工作提供科学依据。方法 2010年4—9月,对荔湾区公共场所28个集中空调冷却水塔水样的pH值、嗜肺军团菌、铜绿假单胞菌等微生物指标进行检测,嗜肺军团菌按照卫生部《公共场所集中空调通风系统卫生规范》(2006)检测,铜绿假单胞菌分析按照GB 8538-2008饮用天然矿泉水检验方法进行,pH值按照《生活饮用水检验标准方法》(GB/T 5750-2006)中检验方法进行。结果检测的28份冷却水塔中的水样品,铜绿假单胞菌总阳性检出率为57.14%,嗜肺军团菌阳性检出率为60.71%,两者比较,差异无统计学意义(P>0.05),铜绿假单胞菌的阳性检出率和pH值之间存在负相关关系。结论集中空调冷却水塔铜绿假单胞菌污染严重,应加强冷却水塔的清洗消毒。

[Objective]To learn the contamination statues of Pseudomonas aeruginosa in cooling tower of central air conditioning system,provide scientific basis for the prevention and control of Pseudomonas aeruginosa.[Methods]From April to September 2010,28 water samples were collected from the cooling towers of central air conditioning system in public places of Liwan district,and the indexes of pH value,Legionella pneumophila and Pseudomonas aeruginosa were tested.The Sanitation criterion of centralized air ventilation system in public places（2006） was adopted to test the Legionella pneumophila,the Methods for examination of drinking natural mineral water（GB8538-2008） was applied to test the Pseudomonas aeruginosa,and the Standard examination methods for drinking water（GB/T5750-2006） was adopted to test the pH value.[Results]Among 28 samples,the total positive rate of Pseudomonas aeruginosa was57.14%,that of Legionella pneumophila was 60.71%,and the difference was not significant（P〉0.05）.There was negative correlation between the positive rate of Pseudomonas aeruginosa and the PH value.[Conclusion]Pseudomonas aeruginosa contamination is serious in cooling tower of central air conditioning system,and it is necessary to strengthen the cleaning and disinfection of cooling towers.