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- Title
Modelling enhanced coagulation to improve ozone disinfection
- Authors
Gagnon, Graham A.; Huck, Peter M.; Urfer, Daniel; Mutti, Dennis; Smith, Franklyn
- Abstract
Enhanced coagulation involves modifying the coagulation process to increase the removal of natural organic matter. Use of enhanced coagulation to improve the disinfection capabilities of a postsedimentationozonation system was investigated at full scale. Empirical modeling showed that enhanced coagulation substantially benefitted the averageozone concentration and the calculated inactivation of microorganisms in a full-scale ozone contactor. For the specific water source and ozonation system studied, the parameters that significantly affected average ozone concentration were transferred ozone dosage, settled water pH, settled water nonpurgeable organic carbon concentration, water temperature, and flow rate. Results of the study indicate that site-specific models can be a useful tool for understanding the multiple effects of flow rate on C x T (disinfectant concentration times contact time) in a given ozone contactor. This research represents the first time that these two process steps-enhanced coagulation and ozonation-have been clearly linked. Prior to this study, the effects of enhanced coagulation on a subsequent ozonation step had not been investigated.
- Subjects
DISINFECTION &; disinfectants; MODELING (Sculpture); SEWAGE purification
- Publication
Journal: American Water Works Association, 1999, Vol 91, Issue 3, p59
- ISSN
0003-150X
- Publication type
Article