Town of Newburgh
Wastewater Treatment Plant Expansion
Client:
P.O. Box 6
Newburgh, IN 47629
(812) 853-7111
Project Description:
In 1991, the town completed a plant expansion, which doubled the
capacity of the facility built in the early 1970's. This expansion
was designed to meet the needs of the area for a 20-year period.
However, growth has far exceeded expectations, resulting in a need
for additional expansion only 8 years after completion of
construction.
The expansion project was divided into two parts, the first of
which was a new mile long, 48" diameter outfall to the Ohio River,
facilitating the abandonment of an existing outfall to Cypress
Creek. The second part included the doubling of the existing plant
up to 4.6 MGD. Technical features of the expansion included a
sequential batch reactor, a biosolids facility and a SCADA
system.
In 2007, Commonwealth completed a Preliminary
Engineering Report to expand the plant with similar technology to
7.36 MGD. Before the expansion, this treatment plant had a
five-cell sequencing batch reactor (SBR) for activated sludge
treatment, chlorine disinfection and aerobic sludge digestion. This
expansion project will increase the number of sequencing batch
reactor tanks from five to eight, therefore increasing the plant
capacity from 4.6 to 7.36 mgd. Peak flow capacity will be increased
from 14.8 to 19.0 MGD.
The project headworks will be improved by adding a third moving
filter screen, a new vortex type grit removal system, and a
Parshall flume flow meter. The chlorine disinfection system will be
replaced with a new open channel type ultraviolet light
disinfection system. To dampen peak flows to the disinfection
system, a flow equalization tank will be constructed between the
SBR tanks and the disinfection facility. The existing metal tanks
(old package plants) will be demolished and two new sludge
treatment units each consisting of three aeration cells and one
gravity thickener will be constructed. A second belt filter press
will be installed along with a new screenings and grit dewatering
tank. Other new facilities include a new administration
/laboratory/ training building, new blowers and blower buildings,
and vehicle buildings.
The second expansion is currently in construction and is
expected to be complete in 2010.
