本研究调查了荧光染色聚苯乙烯微球在全尺寸臭氧接触器中用于评估饮用水消毒效率的情况。在加利福尼亚州弗里蒙特的阿拉米达县水区水处理厂，使用两个平行的全尺寸臭氧气泡扩散接触器中的一个进行了演示。用流式细胞术分析微球悬浮液以确定荧光分布的变化。选择阈值荧光强度可以确定与微小隐孢子虫失活曲线相关的微球“存活”率。与浓度-时间-接触时间（CxT）概念相比，替代指标的使用为全面评估和优化臭氧消毒效率提供了一种可能更简单、更准确的方法- 秤式接触器，用于证明符合消毒要求。包括9个参考文献、表格、图表。

This research investigated the use of fluorescent-dyed polystyrene microspheres to assess drinking water disinfection efficiency in full-scale ozone contactors. A demonstration was conducted with one of two parallel full-scale ozone bubble-diffuser contactors at the Alameda County Water District Water Treatment Plant in Fremont, California. Microsphere suspensions were anlyzed by flow cytometry to determine changes in fluorescence distribution. Selection of threshold fluorescence intensities allowed the determination of microsphere "survival" ratios that were correlated with Cryptosporidium parvum inactivation curves. Compared with the concentration times contact time (CxT) concept, use of the surrogate indicators offered a potentially simpler and more accurate approach for assessing and optmizing ozone disinfection efficiency achieved in full-scale contactors and for demonstrating compliance with disinfection requirements. Includes 9 references, tables, figures.