地表水处理规则要求地表水处理厂去除病毒和蓝氏贾第鞭毛虫囊肿，或将其灭活至特定水平。颗粒去除数据可用于证明治疗系统提供的贾第虫去除水平。本文介绍了两种澄清过滤处理装置的颗粒去除结果，并研究了预氧化对工艺性能的影响。当臭氧被用作预氧化剂时，过滤过程中颗粒物的强化去除是臭氧优于氯、二氧化氯和高锰酸钾的一个显著优势。包括24个参考文献、表格和图表。

Surface-water treatment plants are required by the Surface Water Treatment Rule to remove viruses and Giardia lamblia cysts or to inactivate them to specific levels. Particle removal data can be used to demonstrate the level of Giardia removal provided by the treatment system. This article presents the results of particle removal by two clarification-filtration treatment trains and investigates the effect of preoxidation on process performance. The enhanced removal of particles during filtration, when ozone was used as the preoxidant, was a significant advantage of ozone over chlorine, chlorine dioxide, and potassium permanganate. Includes 24 references, tables, figures.