饮水机中纯净水紫外线消毒效果研究

目的研究紫外线对饮水机中纯净水的消毒效果。方法采用紫外线灯自行改进饮水机原有结构。在室内模拟实际使用情况,选择不同紫外线灯辐照强度及出水流量进行试验。水中菌落总数检测按(GB17324-1998)《瓶装饮用纯净水卫生标准》进行。结果采用紫外线消毒时,在2支紫外线灯串联、出水流量为600ml/min条件下,整个试验过程中阀出水菌落总数均小于20cfu/ml,明显低于对照组(P<0.01),第8天阀出水菌落总数仅为5cfu/ml。结论采用紫外线对饮水机中纯净水消毒,可有良好的消毒效果。

Effects of Ultraviolet Radiation Disinfection on Purified Water in Water Dispenser

Objective To study the effects of ultraviolet(UV)radiation disinfection on purified wecter in water dis-penser.Methods The original structure of water dispenser was modified by installing additional UV lamps.The water samples were collected from the tap of the newly modified water dispenser simulated the practical status of water supply in indoor environment under the different conditions including different intensities of UV lamps and water flow rates.The total counts of bacteria of water samples were determined based on the Sanitary Standard for Bottled Purified Drinking water(GB17324-1998).Results The total counts of bacteria of water samples collected from the tap of the newly mod-ified water dispenser were below20cfu/ml,which was lower than those of control water sample(P<0.01),during the whole experimental period.Using2UV lamps series at water flow rate of600ml/min,and showed a lower level of only5cfu/ml on the8th day of the experiment.Con clusion The pruified water in water dispenser could be effectively dis-infected by the inner UV lamps.