Objective To understand the Legionella pneumophila pollution and the effects of killing Legionella pneumophila by electrolyzed water of Centralized Air Ventilation System in Huizhou City.Methods We culture and identify 123 units Legionella pneumophila,which collecting in the Centralized Air-conditioners cooling circulation water of Huizhou.A new type of low-voltage high-frequency electrolytic water equipment is applied by Guang Zhou Shui Li Qing Environmental Protection Technology Co.,Ltd.It can use physical way instead of chemicals to deal with Legionella pneumophila and other pathogenic microorganisms in cooling circulating water in centralized air-conditioners.Results In the survey of 123 units,448 water samples were collected,313 samples were prove out that contain Legionella pneumophila,the detection rate is 69.86％.At the same time,62 units which contain Legionella pneumophila were collected from Centralized Air-conditioners and deal with low voltage high frequency Electrolyzed Water equipment for 7-73 d.Finally,112 water samples,which from those units,were found out that all the Legionella pneumophila had been killed.The sterilizing rate for the Legionella pneumophila is 100％.Conclusion Part of Centralized Air-conditioners Cooling Circulating Water were Pollution by Legionella pneumophila in Huizhou,Daily inspection should be taken,The low-voltage high-frequency electrolytic water equipment can effectively control and sterilize Legionella pneumophila etc in the cooling water and chilled water in centralized air-conditioners.It has a good application prospect for this technology.%目的 了解惠州市中央空调冷却循环水中嗜肺军团菌污染情况和电解水对其的杀灭效果观察.方法 对惠州市123个单位中央空调冷却循环水进行嗜肺军团菌的培养和鉴定;然后采用源自广州水力清环保科技有限公司的新型低压高频电解水处理器,用物理方式代替化学药剂,处理中央空调冷却循环水中的嗜肺军团菌等致病微生物.结果 在调查的123个单位中,共采集水样448份,检出嗜肺军团菌313份,检出率为69.86％.同时,使用低压高频电解水处理器对冷却循环水嗜肺军团菌阳性的62个单位中央空调进行消毒7～73 d后,检测冷却循环水112份水样中嗜肺军团菌,结果均转为阴性,显示对嗜肺军团菌杀灭率达100％.结论 惠州市部分中央空调冷却循环水中存在嗜肺军团菌的污染,应加强监测,预防军团菌病的发生;低压高频电解水可以有效杀灭中央空调冷却循环水中嗜肺军团菌,该项技术有良好的应用前景.
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