近年来，各种病毒、细菌和原生动物 探员被指为水性探员 对人类健康的威胁。虽然隐孢子虫和贾第虫 一直是人们关注的焦点（以及大多数监管行动）， 新出现的水传播病原体包括大肠杆菌157:H7 嗜水气单胞菌。这项研究是为了 确定这些和其他病原体是否有效 通过目前的地表水处理技术去除。 微小隐孢子虫，肠道脑炎 孢子、肠致病性大肠杆菌157:H7、嗜水气单胞菌和 对噬菌体MS2进行中试规模的常规检测 明矾混凝、絮凝、沉淀和沉淀处理 过滤。这项研究测试了过滤器运行时间和替代方案的影响 加载速率、替代过滤介质和病原体的pH值 移动结果表明，浊度在最后突破 过滤器的运行伴随着所有过滤器的突破 病原体检测，a。 嗜水气单胞菌和大肠杆菌157:H7。过滤速度和替代方案 过滤介质配置对病原菌无明显影响 移动预处理和过滤pH值为5.7时效果更好 砂滤法去除微小隐孢子虫病原体 大肠杆菌157:H7和噬菌体MS2通过双重培养基 和trimedia过滤。 尽管传统治疗提供了有效的障碍 针对某些微生物威胁，它对其他微生物的防御能力很差。 与隐孢子虫相比，某些病原体达到 过滤器突破速度更快，且常规过滤器去除效果更差 方法多重治疗屏障方法可能提供 地表水供应商能更好地防范新出现的污染 水传播病原体。包括21个参考文献、表格和图表。

In recent years, a variety of viral, bacterial, and protozoan agents have been implicated as waterborne agents that pose a risk to human health. Although Cryptosporidium and Giardia have been the focus of concern (and most regulatory action), emerging waterborne pathogens include Escherichia coliO157:H7 and Aeromonas hydrophila. This research was undertaken to determine whether these and other pathogens are effectively removed by current surface water treatment technology. Cryptosporidium parvumoocysts, Encephalitozoon intestinalis spores, enteropathogenic E. coliO157:H7, A. hydrophila,and bacteriophage MS2 were subjected to pilot-scale conventional treatment with alum coagulation, flocculation, sedimentation, and filtration. The study tested the effects of filter run time, alternative loading rates, alternative filter media, and pH on pathogen removal. Results indicated that turbidity breakthrough at the end of a filter run was accompanied by the breakthrough of all pathogens tested, with a more rapid breakthrough of A. hydrophilaand E. coliO157:H7. Filtration rate and alternative filter media configurations had no apparent effect on pathogen removal. A pretreatment and filtration pH of 5.7 achieved better pathogen removal for C. parvumoocysts through sand filtration and for E. coliO157:H7 and bacteriophage MS2 through dualmedia and trimedia filtration. Although conventional treatment offers an effective barrier against some microbial threats, it is a poor defense against others. Compared with Cryptosporidium, certain pathogens reach filter breakthrough faster and are more poorly removed by conventional means. A multiple-treatment barrier approach may provide surface water suppliers with a better safeguard against emerging waterborne pathogens. Includes 21 references, table, figures.