Investigation on Indoor Air Quality of Chafing Dish Restaurants / 环境与健康杂志

15 mg/m3, 9.1% at CO concentration of

Experimental Study on the Microbiological Pollution in Purified Drinking Water From the Taps of Water Dispensers / 环境与健康杂志

Objective To study the safe drinking duration of purified drinking water of water dispensers, the relationship between the sanitary quality of purified drinking water and the structure of the water dispensers. Methods 30 drinking water dispensers were collected from the market and divided into 3 groups based on the structural types. A following-up experimental observation for the changes of the microbiological indexes of the water samples from the taps of water dispensers with different structures during the different prolongating operating period was carried out. Results The safe drinking duration was ≤ 4 days for the purified drinking water sampled from the taps of the water dispensers with common type at the normal atmospheric temperature and ≤ 14 day for water dispensers with bacterial inhibition type. The sanitary quality of the purified drinking water sampled from the taps of water dispensers was associated with the structural type of water dispensers, but not the brands of water dispensers. Conclusion The experimental results of the water samples collected from the taps of water dispensers with bacterial inbibition type at normal atmospheric temperature was better in quality than those of common type. The water dispensers with bacterial inhibition type provided with hygienic licence should be better recommended to choice.