臭氧对蓝氏贾第鞭毛虫和鼠贾第鞭毛虫包囊的灭活作用比较。
Comparison of Giardia lamblia and Giardia muris cyst inactivation by ozone.
作者信息
Finch G R, Black E K, Labatiuk C W, Gyürék L, Belosevic M
机构信息
Department of Civil Engineering, University of Alberta, Edmonton, Canada.
出版信息
Appl Environ Microbiol. 1993 Nov;59(11):3674-80. doi: 10.1128/aem.59.11.3674-3680.1993.
Abstract
Inactivation of Giardia lamblia and Giardia muris cysts was compared by using an ozone demand-free 0.05 M phosphate buffer in bench-scale batch reactors at 22 degrees C. Ozone was added to each trial from a concentrated stock solution for contact times of 2 and 5 min. The viability of the control and treated cysts was evaluated by using the C3H/HeN mouse and Mongolian gerbil models for G. muris and G. lamblia, respectively. The resistance of G. lamblia to ozone was not significantly different from that of G. muris under the study conditions, contrary to previously reported data that suggested G. lamblia was significantly more sensitive to ozone than G. muris was. The simple Ct value for 2 log unit inactivation of G. lamblia was 2.4 times higher than the Ct value recommended by the Surface Water Treatment Rule.
摘要
在22摄氏度的实验室规模间歇式反应器中，使用无臭氧需求的0.05 M磷酸盐缓冲液，比较了杜氏贾第虫和鼠贾第虫囊肿的失活情况。从浓缩储备溶液中向每个试验添加臭氧，接触时间分别为2分钟和5分钟。分别使用C3H/HeN小鼠和蒙古沙鼠模型评估对照囊肿和处理后囊肿对鼠贾第虫和杜氏贾第虫的生存能力。在研究条件下，杜氏贾第虫对臭氧的抗性与鼠贾第虫没有显著差异，这与之前报道的数据相反，之前的数据表明杜氏贾第虫对臭氧的敏感性明显高于鼠贾第虫。杜氏贾第虫2个对数单位失活的简单Ct值比《地表水处理规则》推荐的Ct值高2.4倍。
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