To:
From:
Re:
C. Motion:
Discussion:
City of Nashua, Public Works Division
7 iu ' '
Board of Public Works Meeting Date: April 26, 2018
David L. Boucher, Superintendent
Wastewater Department
Energy Recovery Upgrades — Generator Procurement
To award the generator procurement contract for the Energy Recovery Upgrades
project to Southworth-Milton, Inc. of Milford, MA in an amount not to exceed
$701,840. Funding will be through: Department: 169 Wastewater; Fund: WERF;
Activity: Energy Recovery Generator.
The Energy Recovery Facility at the Nashua Wastewater Treatment Facility was
built in 2000 and is need of upgrades, which is being designed by Waldron
Engineering. Part of the upgrades include the installation of two new generators
that utilize methane gas from the digesters and convert it electricity to feed the
grid.
The manufacture of the two methane generators and associated equipment have a
long lead-time, estimated at 6 months or more. In order to minimize delay time,
the two generators and associated heat exchangers can be contracted now while
final design is being completed. This will save approximately 2 months of
downtime during construction by having the generators built and ready to ship
when needed by the contractor. The generators will be installed by a contractor.
Installation costs will be put out to bid at a later time.
Two companies bid on this project, with costs as follows:
Southworth Milton Inc. - $701,840
Kraft Power - $709,715
The low bidder, Southworth Milton, will provide two CAT gas generators along
with three sets of heat exchangers for each generator. Waldron Engineering has
reviewed the bid documents and qualifications of Southworth Milton, and
recommended the award to them. In addition, all the generators at the wastewater
plant are made by CAT, which facilitates parts stocking, inventory and service
contracts.
