In an effort to replace two aging and maintenance intensive belt filter presses, which were no longer adequately supported by the manufacturer, the SUA elected to upgrade biosolids processing equipment and transition to centrifuge solids dewatering.
The objective of the project was to reduce incoming aerobically digested waste-activated sludge (WAS) to 20% solids content by weight based upon a feed rate of 120gpm to each machine with a 1.5% solids content of 15,000 mg/l (1.5%).
Under a continuing design-build contract Globaltech provided pilot testing and competitive equipment selection, permitting, engineering, and design-build construction services for two new centrifuges in a phased approach which allowed continuous dewatering during demolition and replacement.
As a design-builder, Globaltech also self-performed mechanical process, equipment installation, and structural improvements Continuous dewatering operation was achieved by removal of one belt filter press, installation and commissioning of one new centrifuge followed by installation and commissioning of the second new centrifuge and final demolition of the remaining belt filter press.
Project Achievements / Benefits
The project involved the installation of two new centrifuges, which significantly exceeded the Design-Build criteria performance requirements and greatly improved reliability, along with the installation of new polymer storage and feed facilities. A 5-ton bridge crane was also installed to support ongoing maintenance and servicing of equipment, while significant structural improvements were made to the existing building to accommodate the crane and new equipment. Additionally, a new conveyor system and improved truck loading operation with a motorized bin gate were implemented. Through competitive equipment selection and Owner Direct Purchase Tax Savings, the owner achieved savings of over $320,000.
Project Timeframe
Phase I: 19 Months
Phase II: 14 Months
Completed September 2024
Project Cost Estimate
$5,101,904
Client
Brent Weidenhammer, P.E.
Wastewater Department Manager
Seacoast Utility Authority 4200 Hood Road Palm Beach Gardens, Florida 33410
Phone: (561) 627-2900
Expertise
Design Builder