本文讨论了美国环境保护署（US Environmental Protection Agency）饮用水研究部门进行的中试工厂研究，以评估小型水系统使用慢速过滤去除颗粒物、总大肠菌群、标准平板计数细菌、总有机碳和三卤甲烷生成潜力（THMFP）。本文描述了两个中试规模的过滤系统:一个运行800天的慢速砂滤器，以及一个与运行200天的含有颗粒活性炭（GAC）的慢速过滤器并行运行的第二个慢速砂滤器。介绍了两个中试系统的运行经验和水处理数据。 结果表明，慢速砂滤可以有效地控制浊度、颗粒物和细菌。后氯化可进一步降低过滤出水的细菌密度。含有高THMFP水平原水的小型系统可能不会发现适合控制THMs的慢速砂滤，但慢速活性炭过滤可能会提供THMs和其他有机物所需的控制。饮用水研究部门预计将对这些中试规模的过滤器进行进一步研究。包括5个参考文献、表格、图表。

This article discusses pilot-plant studies conducted by the US Environmental Protection Agency's Drinking Water Research Division to evaluate the use of slow-rate filtration by small water systems for the removal of particulates, total coliforms, standard plate count bacteria, total organic carbon, and trihalomethane formation potential (THMFP). The article describes two pilot-plant scale filtration systems: a slow sand filter, operated for 800 days, and a second slow sand filter operated in parallel with a slow-rate filter containing granular activated carbon (GAC), operated for 200 days. Operating experiences and water treatment data for the two pilot systems are presented. Results indicate that slow sand filtration can be effective for turbidity, particulate, and bacterial control. Postchlorination could further reduce the bacterial densities of filter effluent. Small systems with a raw water containing high THMFP levels may not find slow sand filtration suitable for controlling THMs, but slow activated carbon filtration may provide the required control for THMs and other organics. The Drinking Water Research Division anticipates further studies of these pilot-scale filters. Includes 5 references, tables, figures.