To:
From:
Re:
B. Motion:
Attachments:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: May 18, 2017
Noelle Osborne, Plant Operations Supervisor
Wastewater Department
Polymer
To approve the contracts with Polydyne of Riceboro, GA in the amount of $300,000 and
BASF Corporation of Florham Park, NJ in the amount of $10,000. Funding will be
through: Department: 169 Wastewater; Fund: Wastewater; Account Classification: 61
Supplies & Materials.
Vendor quotes
Polymer is a product used at the plant to coagulate sludge. The Facility has three different
types from two different manufacturers that best fit our needs.
Periodically, the Facility has different companies come in and do bench testing to ensure
we are using the best polymer for the best price to meet our needs. We have recently
changed our polymer for our inclined screw presses, which has produced a drier product,
saving the City a significant amount of money in trucking costs. The product we are
currently using is Polydyne NE2180. Additionally, we have selected a new product for
our gravity belt thickeners, at a lower price point, again resulting in a savings for the
City. This product is Polydyne C-6266.
Polydyne is offering the City a unit price of $1.03/Ib for both of these products for the
FY18 year. Our annual estimated cost for these two polymers is $300,000.
The third type of polymer, Zetag 4110 dry, is for the Wet Weather Facility to be used
during rain events. This product is specific to this process and needs to be purchased
through a separate vendor to meet the molecular weight and electrical charge that is
optimum for the facility’s sludge processing needs. This final polymer is quoted at $2.53/
Ib. and we estimate the annual cost to be $10,000.
