2022-2026 Capital Improvement Program.pdf
Contact Tim Wilkey Depar tment PUBLIC WORKS
V3174
Pr oject #
Pr oject Name Aer ation Equipment Impr ovements
Type One Phase
Useful Life 20 years
MATCH % NONE GRANTEE NONE
TIF DISTRICT None PLAN None
Pr ior ity Efficiency Improvement (3) Categor y Wastewater Treatment
Description Phase 1: Replace the remaining mixers in the aeration trains 1 - 4 with high efficiency mixers matching those placed in Cell 9 of trains 1-4 and replace mixers in the high strength tank. This would be total of 30 mixers. Phase 2: Replace Lamson 300 HP Centrifugal Blower with a High Speed Turbo Blower including any ancillary equipment, pipe modifications and PLC programing. Justification Phase 1: Most of these mixers are original to the 2002/2014 construction and have been rebuilt at least once at a cost of $7,000 to almost $10,000 apiece. They typically operate 24hs/7 days a week when the trains are in service. Replacement with the higher efficiency mixer with lower horsepower will decrease energy usage and continue to reduce our carbon footprint. Estimated cost savings over a 20-year period were estimated to be in excess of $600,000 when all 30 mixers in operation. Phase 2: The existing Lamson Blowers were placed in service in 2002 as part of the first iteration of the activated sludge process units. The blower is a "starts across the line", meaning that it's either on or off and cannot be regulated with Variable frequency drives. Because of this and it's HP capacity, it has high starting amps that affect our electrical peak loading billing with REC. The New High Speed turbo blower uses a VFD which eliminates the inrush of power, allowing us to regulate our peak loading and work at a lower operating amperage. Total Pr oject Cost: $3,506,000 Status Active
Futur e
Expenditur es
Total
2022
2023
2024
2025
2026
1,470,000
10,000
10,000
PLANNING/DESIGN CONSTRUCTION
2,000,000
2,000,000
Total
4,000 2,000
4,000 2,000
INSPECTION
ADMINISTRATION CONTINGENCY
20,000
20,000
2,036,000
2,036,000
Total
Futur e
Funding Sour ces WASTEWATER FUND
Total
2022
2023
2024
2025
2026
1,470,000
2,036,000 2,036,000
2,036,000 2,036,000
Total
Total
Budget Impact/Other By replacing the Lamson blower with a high speed turbo blower, we anticipate a 10% reduction in power cost for the foreseeable future. The estimated annual savings is less than $10,000 per year.
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