enhancement strategies (peroxide and/
or nutrient addition) on the holistic optimization of upstream treatment processes.
Specifically, improved biofilter water treatment performance allowed a reduction
in coagulant requirements at DWU, while
providing the same level of treatment.
(DWU) and Tampa Bay Water, the research
confirmed and further optimized nutri-
ent and peroxide biofilter enhancements.
This work also showed that significant
hydraulic benefits could be achieved
with biofilter pH optimization. The proj-
ect also evaluated the impacts of these
BIOLOGICAL FILTERS CAN allow for the
achievement of multiple goals in a single
treatment step. However, these benefits
can only be realized by managing poten-
tial filter hydraulic challenges caused by
biological fouling. In this tailored collabo-
ration project with Dallas Water Utilities
Optimizing Engineered Biofiltration (project #4346)
THE PURPOSE OF the project was to improve utility responses
to main breaks and depressurization events to better protect
public health. A risk-based approach to main break responses
was developed, resulting in four categories of main breaks with
commensurate best practices for returning the main to service
while reducing public health risks. In addition the final report, a
Field Pocket Guide was published to help field crews remem-
ber and implement good practices during repair of water main
breaks. The Field Pocket Guide may also be useful in utility train-
ing programs for crews involved in these activities.
Effective Microbial Control Strategies for Main
Breaks and Depressurization (project #4307)