Observation on Microbiological Pollution and Disinfective Effectiveness in Drinking Water Dispensers / 环境与健康杂志

ABSTRACT

Objective To understand the microbiological pollution of drinking water dispensers and find out the effective disinfection method for dispensers. Methods The counts of bacteria, fungi and yeast in water samples collected from the water stored in liners of 52 drinking water dispensers were determined. The total counts of bacteria in water samples of 8 water dispensers were determined before and after disinfection by 1/10 YOUJIE disinfectant for 2 min. Results The medians and over standard rates were 440 cfu/ml and 96.15% for the total count of bacteria, 0 and 30.77% for fungi and yeast in the water samples before disinfection respectively. After 2_min disinfection by 1/10 YOUJIE disinfectant, 5 of 8 drinking water dispensers showed bactericidal rates of 100% and other 3 water dispensers showed bactericidal rates of 99.56%, 99.77% and 99.78% respectively. Bacillus was found in some unkilled bacteria. Conclusion Microbiological pollution in water stored in liners of drinking water dispensers was high, which could be effectively eliminated and disinfected by 1/10 YOUJIE disinfectant for 2 min.