进行了实验室和现场研究，以确定颗粒活性炭（GAC）饮用水过滤器和各种操作变量对填充过滤介质释放到成品水中的影响。最初，对各种过滤介质进行了比较。在实验室柱实验中，GAC、沙子和无烟煤颗粒的表面填充了异养平板计数（HPC）细菌。然而，与其他两种培养基相比，GAC支持的大肠菌群催产素克雷伯氏菌数量更多。对运行中的饮用水过滤器的介质进行比较后发现，GAC过滤的水中含有的颗粒与附着的HPC和大肠菌群细菌的程度大于沙子- 以及经过处理的无烟煤水。在两个设施中评估了各种操作变量对填充罚款增加的影响。统计分析表明，GAC年龄不影响过滤水中填充细粒的发生。然而，更深的GAC床层、应用水浊度的增加以及较高的过滤速率都是导致饮用水中存在填充过滤介质的原因。包括27个参考文献和表格。

Laboratory and field studies were conducted to determine the impact of granular activated carbon (GAC) drinking water filters and various operational variables on the release of populated filtration medium into finished water. Initially, various filtration media were compared. In laboratory column experiments, the surfaces of GAC, sand, and anthracite particles were populated to the same level with heterotrophic plate count (HPC) bacteria. However, GAC supported greater numbers of the coliform Klebsiella oxytoca than the other two media. A comparison of the media from operating drinking water filters showed that GAC-filtered water contained particles with attached HPC and coliform bacteria to a greater extent than sand- and anthracitetreated water. The involvement of various operational variables in the increased release of populated fines was evaluated at two facilities. Statistical analyses showed that GAC age does not affect the occurrence of populated fines in filtered water. However,a deeper GAC bed, an increase in applied water turbidity,and an elevated filtration rate were implicated as contributing to the presence of populated filtration medium in drinking water. Includes 27 references, tables.