Underground Construction - January 2022 - 44
REHABTECHNOLOGY
Innovative Solutions Address Challenges
with Lower Berkeley WWTP Bypass
Dwight Evans, Sunbelt Rentals
To ensure their success, bypass projects require stakeholders to
devise detailed solutions, while also planning for the unexpected.
Making improvements to the aging infrastructure at the Lower
Berkeley Wastewater Treatment Plant (WWTP) was no exception.
Located outside of Charleston, S.C., the WWTP updates required
a bypass between an aeration basin and four clarifiers to refurbish
piping - above and underground - and to replace valves.
Heron Construction of Wakefield, Mass., served as the contractor
heading up the project, in partnership with Sunbelt Rentals as
the equipment provider. Together, the two companies developed
and implemented several solutions to address the challenges of
the aeration system rehabilitation.
44 JANUARY 2022 | UCONonline.com
The challenges
The Lower Berkeley WWTP aeration basin that required improvements
is approximately 300 feet long and 12 feet deep. It operates
by way of a horizontal surface aerator system, featuring six sets of
paddles. These paddles continuously turn the water counterclockwise
to introduce air into the waste stream and allow biomass to stay alive.
The challenge of running a bypass from the aeration basin to
the four clarifiers was two-fold. First, there was very limited space
to implement the required number of diesel and electric pumps to
handle backup flow. Second, the bypass required holding the water
level in the aeration basin vertically within eight inches - similar
bypass projects typically allow three to five feet of variance to
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Underground Construction - January 2022
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Contents
Underground Construction - January 2022 - Cover1
Underground Construction - January 2022 - Cover2
Underground Construction - January 2022 - Contents
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