美国环境保护局（USEPA）的国家风险管理研究 俄亥俄州辛辛那提的实验室（NRMRL）正在评估饮用水过滤系统 确定其满足长期需求的能力2 地表水处理规则（LT2ESWTR），适用于小于 一万人。本文介绍了在俄亥俄州辛辛那提的美国环保局测试与评估（T&E）设施进行的测试的初步结果，以评估和比较 径向流流态化过滤器（R3f）与传统多媒体过滤器的效率比较 （无烟煤/沙子/石榴石/砾石）。R3f系统使用细玻璃珠或石榴石 可流态化和反洗的介质。这两个系统都受到了挑战 不同程度的浑浊度和微生物污染物，如枯草杆菌、大肠杆菌 聚苯乙烯乳胶（PSL）珠（作为隐孢子虫的替代品）。 结果 最初的浑浊度测试确定，使用细石榴石介质（33微米大小）的 R3f系统中的前置和滞后过滤装置产生的出水浊度为 约0.5浊度单位（NTU），来自带有 浊度水平为5 NTU和10 NTU。R3f系统以5%的流速运行 每分钟加仑（gpm），不使用化学混凝剂。R3f过滤系统 性能明显优于传统的多媒体过滤系统 去除微生物污染物和替代物。虽然 与多媒体系统相比，R3f系统的反洗频率更高 在过滤系统中，R3f系统的总水量大于 多媒体过滤系统。对R3f过滤进行了一次挑战性试验 使用隐孢子虫卵囊验证PSL珠替代物去除的系统； 结果 演示了等效的移除。包括6个参考文献、表格、图表。

U.S. Environmental Protection Agency's (USEPA's) National Risk Management Research Laboratory (NRMRL) in Cincinnati, Ohio is evaluating drinking water filtration systems to determine their capability to meet the requirements of the Long-Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) for small communities with less than 10,000 people. This paper presents the preliminary results of tests conducted at the USEPA Test and Evaluation (T&E) Facility in Cincinnati, Ohio to evaluate and compare the effectiveness of a radial flow fluidized filter (R3f) versus a conventional multimedia filter (anthracite/sand/garnet/gravel). The R3f system uses either a fine glass bead or a garnet media that can be fluidized and backwashed. Both systems were challenged with different levels of turbidity and microbiological contaminants such as B. subtilis, E. coli and polystyrene latex (PSL) beads (as a surrogate for Cryptosporidium). The results of initial turbidity tests established that the use of fine garnet media (33 micron size) in the lead and lag filtration units in the R3f system generated effluent with turbidity levels of approximately 0.5 nephelometric turbidity unit (NTU) from influent feed water with turbidity levels of 5 NTU and 10 NTU. The R3f system was operated at a flow rate of 5 gallons per minute (gpm) without using chemical coagulants. The R3f filtration system performed significantly better than the conventional multimedia filtration system in removing turbidity and microbiological contaminants and surrogates. Although the frequency of backwashing is higher in the R3f system as compared to the multimedia filtration system, the overall water throughput in the R3f system was more than that of the multimedia filtration system. One challenge test was conducted on the R3f filtration system using Cryptosporidium oocysts to verify PSL bead surrogate removal; the results demonstrated equivalent removal. Includes 6 references, tables, figures.