To:
From:
Re:
H. Motion:
Attachments:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: June 28, 2018
David L. Boucher, Superintendent
Wastewater Department
Secondary Clarifier Return Activated Sludge Tubes
To approve the purchase of return activated sludge draft tubes for each of the
three secondary clarifiers in the amount of $62,812 from Evoqua Water
Technologies of Waukesha, WI. Funding will be through: Department: 169
Wastewater; Fund: Wastewater, Account Category: 81 Machinery and
Equipment.
Vendor Quote
The Wastewater Facility has three secondary clarifiers where solids settle to the
bottom of the tank and the clean effluent flows over the top wall for disinfection
downstream. The solids settling to the bottom are collected in draft tubes, which
are controlled through flow adjustment sleeves. These sleeves do not work
properly on all 3 clarifiers and need to be replaced.
The Wastewater Department researched adjustable control sleeves, but due to the
technology being outdated, we were only able to find Evoqua Water Technologies
who can provide the needed replacement parts.
Evoqua provided a quote of $62,812, which includes replacement parts for all
three clarifiers as well as installation training on one clarifier.
