The City of Rome needed to increase the capacity of the
Blacks Bluff WWTP so they had JJ&G Engineers look
at the existing equipment to see what could easily be
expanded and incorporated into the expansion.
The existing plant used the
Schreiber
counter current
aeration process for biological treatment of the waste water.
Schreiber proposed the addition of fixed air diffusers on the
perimeter of the existing aeration basins in order to meet the
additional oxygen demand for the plant expansion. This allowed
the existing bridge, diffusers and concrete tanks to be used in order
to keep the cost of construction to a minimum. The proposal was
determined to be the best solution and was installed.
The City of Rome needed a grit and grease removal
system at the head of the plant to remove the heavy grit and grease
loads that
come
to the plant. The Schreiber design was selected for this
application. The design had to take into account that the
screens upstream of the grit and grease tanks had 2” bar spacing and
the type of grease coming to the grit and grease removal system would
be a heavy grease intermingled with whatever solids passed through the
screens 2” bar spacing. Schreiber modified the design to
incorporate air and water lances that would push the heavy grease down
the grease channel to the removal auger.
The
City, JJ&G and Schreiber worked to fine tune the design after
installation so that the grit and grease removal system could remove
the wastes that were particular to this application.
The solids handling at the plant incorporates the use
of anaerobic digesters. The existing digesters were rehabbed and
Vaughan’s Rotamix digester
mixing system was installed to provide an efficient mixing system for
the plant upgrades.
