瓶装饮用纯净水细菌数量变化规律研究

Study on Bacterial Variations Regularity in Bottled Purified Drinking Water

对瓶装饮用纯净水细菌数量变化规律进行了研究。在某生产厂家采集5加仑和600ml塑料瓶（桶）装纯净水保存于室温。自生产后3h，每24～56h检验菌落总数，至保存35d止。保存过程中，所有600ml瓶装水试样的细菌数量均急剧增加，在5～7d内达到高峰，菌数范围在＜1～1．53×105ml-1之间，之后，生长曲线呈现双峰。同样情况也出现在5加仑桶装成品中。

The quantitative study of bacteria in bottled purified drinking water was carried out.The bottled water samples in plastic containers of five gallons and 600ml were collected from the bottling factory and were stored at indoor temperature.Three hours after being bottled,the total colony count was determined every 24-56 hours in up t0 35 days.The bacterial quantities of all the studied water samples in 600 ml bottle increased in numbers and reached a peak with the total colony count ranging from <1 ml-1 to 1 .53 ×103ml-1 by the end of about one week.After then.the baterial count ran a fluctucting course of two peaks .The same occurred in the five gallons samples.