The Eagle Mountain Water Treatment Plant (EMWTP) in Fort Worth, Texas, was
brought on line in 1992. Now, only six years later, the EMWTP requires expansion
to a capacity of 60 million gallons per day because of the rapid growth in the
Fort Worth service area. The expansion of the ozonation facilities proved to be
more complicated than just adding additional generation equipment and contactors.
Advances in ozonation technology over the past six years required the authors to
reconsider such basic parameters as feed gas, cooling water, and control
strategy. This paper documents the process of system evaluation and the design of
the ozonation facilities at the EMWTP, and brings to light issues other designers
should consider in future ozonation facility expansions. Among these factors are
advances in dielectric technology, allowing higher ozone concentration at lower
specific energy; changing feed gas from air to oxygen; incorporating actual plant
operational history using ozone; and bidding and procurement alternatives. The
ozone facility expansion increased the production capacity from 560 pounds per
day to 2600 pounds per day, and converted the feed gas from air to oxygen. Includes 2 references, tables.