作为辛辛那提（俄亥俄州）水厂过滤介质中试规模检查的一部分，热灭活贾第鞭毛虫囊肿和隐孢子虫卵囊被注入已经经历凝固和沉淀的地表水中。然后，将该加标水引入中试规模的过滤器中，该过滤器仅包含沙子、典型的双无烟煤沙子和深双无烟煤沙子介质配置。本研究中使用的所有培养基类型均表现出相似的去除能力，平均囊肿去除量为2.7-4.5对数，平均卵囊去除量为2.7-3.9对数。内孢子和聚苯乙烯珠的去除率与原生动物的去除率相似，但浊度和颗粒数的去除能力明显降低。包括23个参考文献、表格和图表。

As part of a pilot-scale examination of filtration media at the Cincinnati (Ohio) Water Works, heat-inactivated Giardia cysts and Cryptosporidium oocysts were spiked into surface water that had already undergone coagulation and sedimentation. This spiked water was then introduced into pilot-scale filters containing sand only, typical dual anthracite-sand, and deep dual anthracite-sand media configurations. All of the media types used in this study demonstrated similar removal capabilities, with average cyst removal ranging from 2.7 to > 4.5 logs and average oocyst removal of 2.7-3.9 logs. Endospore and polystyrene bead removals were similar to those of the protozoa, but turbidity and particle counts demonstrated substantially less removal capability. Includes 23 references, tables, figures.