A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Giardia and Cryptosporidium Removals by clarification and filtration under challenge conditions
This research examined removals of Giardia and Cryptosporidium by clarification (either dissolved‐air flotation [DAF] or 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 plate 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 plate 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.
Giardia and Cryptosporidium Removals by clarification and filtration under challenge conditions
This research examined removals of Giardia and Cryptosporidium by clarification (either dissolved‐air flotation [DAF] or 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 plate 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 plate 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.
Giardia and Cryptosporidium Removals by clarification and filtration under challenge conditions
Edzwald, James K. (author) / Tobiason, John E. (author) / Parento, Leah M. (author) / Kelley, Michael B. (author) / Kaminski, Gary S. (author) / Dunn, Howard J. (author) / Galant, Peter B. (author)
Journal ‐ American Water Works Association ; 92 ; 70-84
2000-12-01
15 pages
Article (Journal)
Electronic Resource
English
Optimum Alum Coagulation Conditions for Cryptosporidium Removals
| British Library Conference Proceedings | 2005
Removing Giardia and Cryptosporidium by Slow Sand Filtration
| Wiley | 1993
Online Contents | 1996
High-Rate Direct Filtration for Giardia and Cryptosporidium Removal
| British Library Conference Proceedings | 1996