The City of Arlington (City), Texas is faced with both operational and water quality complications at their John Kubala (JK) and Pierce-Burch (PB) water treatment facilities. While the ozone/biofiltration systems have performance well for many years, they experience occasional process
upsets including shortened filter run times, underdrain, tastes and odors, and manganese breakthrough. This study, part of a Water Research Foundation Tailored Collaboration project, focused on evaluating methods for restoring and enhancing the performance of an existing full-scale ozone/biofiltration
process through phosphorus supplementation. The findings from this work indicate that biofilter low-level phosphorus supplementation (<0.025 μg/L) can improve hydraulic performance and effluent water quality. Phosphorus supplementation sustainably decreased biofilter headloss by greater
than 15% compared to a control. In addition, removals were enhanced for taste- and odor-causing 2-methylisoborneol (MIB) (between 30 and 70%), manganese (between 76 and 83%), and dissolved organic carbon (DOC) (between 50 and 100%).
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