由于需要采用多屏障方法去除病原体，因此过滤等物理去除过程变得越来越重要。美国环境保护局（US Environmental Protection Agency）的长期2强化地表水处理规则（LT2ESWTR）利用工具箱方法，为公用事业公司提供各种处理选项，以获得微小隐孢子虫去除/失活信用，其中之一是过滤器性能的演示。从飞行员那里获得的微小隐球菌清除数据的全面确认- 规模研究虽然在常规基础上可能不切实际，但将有助于提供设计和进行播种研究的策略，以尽可能指示全面清除微小隐孢子虫。这项研究表明，中试规模过滤的微球去除率通常表明在稳定和过滤周期后期的全规模过滤过程中获得的微球去除率。这项研究还表明，卵囊大小的聚苯乙烯微球可以去除>4- 在过滤器循环的早期和后期的稳定运行期间，可以实现对数。本次调查的结果表明，LT2ESWTR规定的性能演示应以明确解释和潜在标准化的方式进行。包括11个参考文献、图表。

The need for a multi-barrier approach to pathogen removal necessitates the increased importance of physical removal processes such as filtration. The US Environmental Protection Agency's Long-Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) utilizes a toolbox approach that offers utilities a variety of treatment options for obtaining Cryptosporidium parvum removal/inactivation credits, one of which is demonstrations of filter performance. Full-scale confirmation of C. parvum removal data obtained from pilot-scale studies, though likely impractical on a regular basis, would help to provide strategies for designing and conducting seeding studies that are as indicative of full-scale C. parvum removal as possible. This investigation demonstrated that microsphere removals by pilot-scale filtration were generally indicative of those obtained during full-scale filtration during stable and late in filter cycle operation. This study also demonstrated that oocysts-sized polystyrene microsphere removals of>4-log could be achieved during periods of stable operation during both early and late portions of the filter cycle. The outcomes of this investigation suggested that performance demonstrations such as those specified by the LT2ESWTR should be conducted in a clearly explained and potentially standardized manner. Includes 11 references, figures.