本文描述了科罗拉多州柯林斯堡科罗拉多州立大学工程研究中心进行的研究，以确定硅藻土（DE）用于去除贾第虫囊肿的适用性。还测定了浊度、总大肠菌群、标准平板计数细菌和颗粒物的去除率。对以下操作条件进行了检查:DE品位、水力负荷率、细菌和贾第鞭毛虫囊肿的进水浓度、水头损失、运行时间、温度、过滤运行持续时间，以及使用明矾涂层DE。中试工厂试验表明，在各种条件下，对于所有DE品位的贾第鞭毛虫囊肿，DE过滤几乎100%有效。品位是去除细菌和浊度的重要因素。明矾涂层DE显著提高了浊度和细菌的去除率。包括23个参考文献、表格和图表。

This article describes research conducted at the Colorado State University Engineering Research Center in Fort Collins, Colorado, to ascertain the suitability of diatomaceous earth (DE) for the removal of Giardia cysts. Removals of turbidity, total coliform bacteria, standard plate count bacteria, and particles were also determined. The following operating conditions were examined: DE grade, hydraulic loading rate, influent concentrations of bacteria and Giardia cysts, head loss, run time, temperature, duration of filtration run, and the use of alum-coated DE. Pilot plant tests indicate that DE filtration is virtually 100 percent effective in Giardia cyst removal for all DE grades over a wide range of conditions. Grade is an important factor in the removal of bacterial and turbidity. Alum coated DE significantly improved removals of turbidity and bacteria. Includes 23 references, tables, figures.