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Plant conversion experience: ozone BAC process installation and disinfectant residual control
The David L. Tippin Water Treatment Facility in Tampa, Fla., treats Hillsborough River water, which has relatively high organic matter content, especially during high‐rainfall seasons. In 2001, ozonation and biologically activated carbon (BAC) filtration were implemented along with a few additional modifications to the existing conventional process. After the start of the new process, unexpectedly low monochloramine formation efficiency and rapid decay of monochloramine residual in treated waters were observed. By changing the sequence of free chlorine and ammonia injection and by providing sufficient mixing and reaction time for free chlorine, monochloramine formation efficiency was dramatically increased. Among several factors that might affect monochloramine decay rate, the particulate matter produced from the BAC filters, presumably because of microbial activities, was found to be primarily responsible for the monochloramine demand. The filter backwashing practice was modified to successfully enhance filter performance and stabilize monochloramine in treated waters.
Plant conversion experience: ozone BAC process installation and disinfectant residual control
The David L. Tippin Water Treatment Facility in Tampa, Fla., treats Hillsborough River water, which has relatively high organic matter content, especially during high‐rainfall seasons. In 2001, ozonation and biologically activated carbon (BAC) filtration were implemented along with a few additional modifications to the existing conventional process. After the start of the new process, unexpectedly low monochloramine formation efficiency and rapid decay of monochloramine residual in treated waters were observed. By changing the sequence of free chlorine and ammonia injection and by providing sufficient mixing and reaction time for free chlorine, monochloramine formation efficiency was dramatically increased. Among several factors that might affect monochloramine decay rate, the particulate matter produced from the BAC filters, presumably because of microbial activities, was found to be primarily responsible for the monochloramine demand. The filter backwashing practice was modified to successfully enhance filter performance and stabilize monochloramine in treated waters.
Plant conversion experience: ozone BAC process installation and disinfectant residual control
Marda, Saurabh (author) / Kim, Doo‐Il (author) / Kim, Myung‐Jong (author) / Gordy, John (author) / Pierpont, Skip (author) / Gianatasio, Jim (author) / Amirtharajah, Appiah (author) / Kim, Jae‐Hong (author)
Journal ‐ American Water Works Association ; 100 ; 117-128
2008-04-01
12 pages
Article (Journal)
Electronic Resource
English
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