According
to recent reports, the U.S. Environmental Protection Agency
estimates $202.5 billion is the nationwide capital investment
needed to control wastewater pollution for up to a 20 year
period. The major categories for the needs include $134.4
billion for wastewater treatment and collection systems,
$54.8 billion for combined sewer overflow corrections, and
$9.0 billion for stormwater management.
Sidestream
storage is one of many tools being employed by wastewater
system owners to control Wet Weather Sanitary Sewer Overflows
(SSO’s)
and help manage the peak flows created by Infiltration and
Inflow. One municipality has coined the term SWAT for their
Severe Weather Attenuation Tank concept. The more famous acronym
for SWAT is Special Weapons and Tactics. The relevant concept
of using the term SWAT in this application is the term special.
The concept of a SWAT (in the context of reducing SSO’s)
does not fit everywhere. One system in particular has used
the concept successfully to reduce process upsets within wastewater
treatment plants and to reduce wet weather related SSO’s
in the collection system.
This
presentation will present a few applications of a SWAT and
discuss several others identified through literature research.
Audience participation will be encouraged to allow for sharing
of successes and failures with the goal of everyone gaining
some level of awareness of another tool for the toolbox. |
