本研究通过澄清检查了贾第虫和隐孢子虫的清除情况 （溶解气浮[DAF]或片状[板]沉淀）和 澄清后进行双介质过滤。这项研究进行了三年 囊肿和卵囊的挑战条件（即高进水浓度） 工艺设计滞留时间和水力负荷。评估 水温对性能的影响，进行了多组实验 冬天和春天。DAF澄清效果优于lamella 沉淀和沉淀持续导致较低的浊度水平和颗粒 计数。通过澄清和鉴定对贾第虫和隐孢子虫的总体原木清除率 DAF和薄层沉淀的过滤效果大致相同。虽然 根据地表水处理规则或临时规范，DAF不被认可 增强地表水处理规则，作者认为基于这些 研究结果表明，DAF植物应获得贾第虫和隐孢子虫清除学分 至少与沉淀厂接收的相同。包括18个参考文献、表格、图表。

This research examined removals of Giardia and Cryptosporidium by clarification (either dissolved-air flotation [DAF] or lamella [plate] sedimentation) and by dual-media filtration following clarification. Studies were conducted for challenge conditions of cysts and oocysts (i.e., high influent concentrations) and for process design detention times and hydraulic loadings. To evaluate the effect of water temperature on performance, sets of experiments were performed for winter and spring seasons. DAF clarification performed better than lamella sedimentation and consistently resulted in lower turbidity levels and particle counts. Overall log removals of Giardia and Cryptosporidium by clarification and filtration were about the same for DAF versus lamella sedimentation. Although DAF is not recognized under the Surface Water Treatment Rule or the Interim Enhanced Surface Water Treatment Rule, the authors argue that based on these findings, DAF plants should receive Giardia and Cryptosporidium removal credits at least equal to those received by sedimentation plants. Includes 18 references, tables, figures.