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City of Atlantic Beach Lower St. Johns River TMDL Project

City of Atlantic Beach Lower St. Johns River TMDL Project . BMAP Annual Meeting February 27, 2014. J. Collins Engineering Associates, LLC. Atlantic Beach Public Utilities. Population ~ 23,000 Total service area includes area outside City limits to the north and west (Buccaneer District)

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City of Atlantic Beach Lower St. Johns River TMDL Project

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  1. City of Atlantic Beach Lower St. Johns River TMDL Project BMAP Annual Meeting February 27, 2014 J. Collins Engineering Associates, LLC

  2. Atlantic Beach Public Utilities • Population ~ 23,000 • Total service area includes area outside City limits to the north and west (Buccaneer District) • City owned two Wastewater Plants (WWTPs)

  3. Planning for Sustainability and Cost Savings • Life cycle costing – determined best option: • Upgrade Atlantic Beach WWTP • Construct Master Lift Station & force main from Buccaneer WWTP to Atlantic Beach WWTP • Abandon Buccaneer WWTP

  4. Construction Cost Savings • Abandoning Buccaneer saved upgrade costs • DEP re-rating of Atlantic Beach WWTP from 3.0 to 3.5 MGD • Reused ~5,000 LF of existing FM by re-directing flow • Retrofitted existing aeration tanks for Nitrogen removal • Unique procurement process for equipment using life-cycle costing

  5. Adding Baffle Walls & New Equipment to Existing Tanks

  6. Sustainability & Operating Cost Savings • Electrical Study • Efficient equipment and automation • Consolidation of sludge treatment to 1 tank • Special load-shedding program to reduce electric Demand • Program to manage effluent pumping • Flow-shedding Buccaneer flows

  7. New Efficient Blowers • Replaced 9 existing blowers with 4 highly efficient turbo blowers • Automated • Programmable • Remote DO meters • Automated valves

  8. Improved Aeration and Mixing Fine-bubble diffusers provide better air transfer, use less energy Energy-efficient, low horsepower mixers

  9. Yard Lights Replaced with High-Efficiency Lighting

  10. Replaced Buccaneer WWTP with Master Lift Station Eliminated pumps, blowers, jet mixers and other high-use equipment (> 1.5 Million KWH/year) WWTP Replaced with pump station

  11. From JEA Account Summary -Electric Statistics Three Year History Shows Dramatic Drop After TMDL Project JEA InvestSmart— City received a $147,781 rebate for making power-saving upgrades

  12. Emergency Generator Consolidation Saves Maintenance Costs and Reduces Fuel Usage Electrical modifications allowed City to eliminate one existing generator Another old generator was able to be replaced with a new, smaller generator

  13. Potable Water Conservation • In-Plant reuse system saves 4 Million Gallons of potable water per year. • The City is now building a 0.5 MGD Reclaimed Plant to serve the Atlantic Beach Country Club and new subdivision.

  14. Sludge Treatment and Odor Control Study Added mixers and fine-bubble diffusers, consolidated treatment into one tank. • Electrical savings— Consolidated sludge treatment to one tank with new equipment • Fuel Savings - Replaced existing wedgewire drying beds with centrifuge, reducing landfill trips • Biological/Chemical odor control added

  15. New Dewatering Facility Reduces trips to the landfill and fuel use (~100 miles round-trip)

  16. Project Costs • Construction costs ~ $10 Million • Received $1 Million grant from SJRWMD • Used FDEP State Revolving Fund Loan

  17. Annual Operating Cost Savings

  18. Nitrogen Removal • Effluent Nitrogen is under the TMDL Limit • Removing > 70,000 pounds per year

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