本文所述的研究旨在评估科罗拉多州Empire使用的慢砂过滤器对贾第虫囊肿、微生物和浊度的去除效率，确定慢砂过滤器的设计指南，并描述慢砂过滤器的运行性能。原水中有五次发现贾第虫囊肿，但成品水中没有发现。在原水中发现了微生物和颗粒物，但在成品水中发现的微生物和颗粒物数量为零或很少。讨论了与砂床深度和砂床预计寿命、冻结、溢流、空气约束、砂回收、中试工厂研究、贾第鞭毛虫囊肿和微生物清除、刮除和所需磨合时间有关的性能特征和推荐设计指南。 包括7个参考文献、表格、图表。

Research described in this article was conducted to evaluate removal efficiencies of the slow sand filter in use at Empire, Colorado, with respect to Giardia cysts, microscopic organisms, and turbidity, to determine guidelines for the design of slow sand filters, and to describe the operating performance of the slow sand filter. Giardia cysts were found in the raw water on five occasions, but none were found in the finished water. Microscopic organisms and particles were found in the raw water but either zero or rare numbers were found in the finished water. Performance characteristics and recommended design guidelines with respect to depth of sand bed and projected life of the bed, freezing, overflow, air binding, sand recycling, pilot plant studies, Giardia cyst and microorganism removal, scraping, and breakin time required are discussed. Includes 7 references, tables, figures.