FROM: James D. Herberg, General Manager
Originator: Rob Thompson, Assistant General Manager
SUBJECT:
title
AGREEMENT FOR THE PURCHASE OF LIQUID CATIONIC POLYMER, SPECIFICATION NO. C-2019-1087BD
end
GENERAL MANAGER'S RECOMMENDATION
recommendation
RECOMMENDATION: Recommend to the Board of Directors to:
A. Approve a Chemical Supplier Agreement with Polydyne, Inc. for the purchase of Cationic Polymer, Specification No. C-2019-1087BD, for the period beginning February 1, 2020 through January 31, 2021 for a unit price of $2.548 per active pound plus freight and applicable sales tax, for a total estimated annual amount of $3,866,280 with four (4) one-year renewal options; and
B. Approve an annual unit price contingency of 15%.
body
BACKGROUND
The cationic polymer is a crucial chemical in the thickening and dewatering processes. The Orange County Sanitation District (Sanitation District) currently uses cationic polymer to dewater digested sludge in the centrifuges at both Plant Nos. 1 and 2. It is mixed into the digested biosolids prior to the dewatering centrifuge process to induce coagulation and to improve dewaterability. Cationic polymer is also used to thicken primary and secondary solids at both Plant Nos. 1 and 2. The thickening process increases the concentration of solids introduced to the digesters which is necessary to maintain regulatory standards for digester detention time and volatile solids reduction.
The unit cost of $2.548 per active pound is a 13% savings from the current unit cost of $2.947 per active pound in the current contract.
RELEVANT STANDARDS
* Safe, beneficial reuse of Biosolids
* Use all practical and effective means for resource recovery
* Sustain 1, 5, 20-year planning horizons
PROBLEM
The current cationic polymer contract with Polydyne, Inc. will end on January 31, 2019 with no renewals remaining.
PROPOSED SOLUTION
Develop cationic polymer specifications for new and existing thickening process...
Click here for full text