本研究的主要目的是确定实验室规模的低浊度水快速过滤所获得的结果是否可以在全规模运行期间复制。具体目标是确定贾第虫囊肿、大肠菌群总数和浊度的清除率，确定水温接近32华氏度（0摄氏度）时快速过滤的效率，并确定低浊度环境水条件下过滤水浊度和混凝剂剂量之间的经验关系。结果表明，使用导频滤波器的研究结果适用于全方位测量- 缩放植物，因为唯一的区别在于床面积-周长关系。在适当的化学凝固条件下，通过浊度、细菌和贾第鞭毛虫囊肿的减少百分比来衡量，快速过滤过程可以去除高百分比的微观颗粒。在32华氏度（0摄氏度）条件下，如果采用适当的化学混凝，低浊度水的快速过滤效率与较高温度下的相同。提出了在处理低浊度水时，确保在全规模处理厂去除贾第虫囊肿和其他微小颗粒的建议。 包括9个参考文献、表格、图表。

The primary objective of this research was to determine whether results obtained with laboratory-scale rapid rate filtration of low turbidity waters could be duplicated during full-scale operation. Specific objectives were to ascertain removals of Giardia cysts, total coliform bacteria, and turbidity, to ascertain the efficiency of rapid rate filtration at water temperatures approaching 32 degrees F (0 degrees C), and to determine empirical relationships between filtered water turbidity and coagulant dose for low turbidity ambient water conditions. Results indicate that research findings using pilot filters are applicable to full-scale plants because the only difference is in the bed area-perimeter relationship. The rapid rate filtration process was found to remove high percentages of microscopic particles, as measured by percent reductions in turbidity, bacteria, and Giardia cysts, when operated with proper chemical coagulation. Rapid rate filtration of low turbidity water was found to be as efficient at 32 degrees F (0 degrees C) as at higher temperatures, if proper chemical coagulation is practiced. Recommendations are presented for assuring the removal of Giardia cysts and other microscopic particles at fullscale treatment plants when low turbidity waters are being treated. Includes 9 references, table, figures.