Algal Turf Scrubber

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Algal Turf Scrubber

  1. 1. Application of the Algal Turf Scrubber® Technology for Point Source and Non Point Source Nitrogen and Phosphorus Control Lower St. Johns Technical Advisory Committee, Jacksonville, FL December 12, 2006 Mark Zivojnovich and Margaret Palmer
  2. 2. Phosphorus and Nitrogen Treatment Alternatives POINT SOURCES •Technology Upgrades NON POINT SOURCES •Best Management Practices •Regional Treatment Systems •Chemical Treatment •Managed Aquatic Plant Systems •Treatment Wetlands
  3. 3. Algal Turf Scrubber® History
  4. 4. Algal Turf Scrubber® (ATS™) Algal Turf Scrubber (ATSTM) (2.0% and 1.5% Slope) ATS™ Pump Station ATS™ Influent Flume and Surgers ATS™ Effluent Flume
  5. 5. Algal Turf Scrubber® Inflow
  6. 6. Algal Turf Production
  7. 7. Algal Turf Production
  8. 8. Algal Turf Scrubber® Solids Management
  9. 9. Centralized Solids Recovery and Management
  10. 10. Algal Residuals Product Applications
  11. 11. Compost Production
  12. 12. Florida Algal Turf Scrubber® Systems
  13. 13. Taylor Creek Algal Turf Scrubber® Regional Stormwater Treatment Facility
  14. 14. Taylor Creek Algal Turf Scrubber® - 15 MGD Okeechobee County, Florida
  15. 15. Taylor Creek Algal Turf Scrubber® - 15 MGD
  16. 16. Taylor Creek Algal Turf Scrubber® - 15 MGD
  17. 17. Taylor Creek Algal Turf Scrubber® - 15 MGD
  18. 18. Egret Marsh Algal Turf Scrubber® Regional Stormwater Treatment Facility
  19. 19. Egret Marsh Algal Turf Scrubber® - 10 MGD Indian River County, Florida
  20. 20. Algal Turf Scrubber® Phosphorus Control
  21. 21. Algal Turf Scrubber® and Treatment Wetlands Relationship of Phosphorus Mass Loading and Areal Removal Rate
  22. 22. Algal Turf Scrubber® Phosphorus Areal Removal Rates for Three ATS™ Units (300’ Floway) Operated at Varying Hydraulic Loading Rates
  23. 23. Algal Turf Scrubber® Nitrogen Control
  24. 24. Algal Turf Scrubber® Relationship of Nitrogen Inflow Mass Loading and Areal Removal Rate at High HLR
  25. 25. Algal Turf Scrubber® Relationship of Nitrogen Inflow Concentration and Areal Removal Rate
  26. 26. Nitrogen Areal Removal Rate for Algal Turf Scrubber® and Constructed Treatment Wetlands
  27. 27. Algal Turf Scrubber® 50-Yr Present Worth Costs
  28. 28. Peer Reviewed Present Worth Costs Sano, D., A.W. Hodges and R. L. Degner. 2005. Economic Analysis of Water Treatment for Phosphorus Removal in Florida: Comparison of Wetland Stormwater Treatment Areas and Managed Aquatic Plant Systems. MAPS phosphorus treatment costs ($/kg P-removed) for proposed treatment systems in the Lake Okeechobee Watershed were 53 – 69% lower than costs for wetland stormwater treatment areas. Costs included capital, operations and management, water storage and recreational benefits. Johns, G. 2005. Cost-Effectiveness of ATS™ Systems with Comparison to RASTAs – Lake Okeechobee Watershed Project. Technical memorandum submitted to SFWMD. “The results shows that regardless of the compost disposition assumption, the discount rate, and the phosphorus concentration of the water as it enters the ATS™ System, the present value cost per pound of phosphorus removed is significantly lower than that of the RASTAs.”
  29. 29. Algal Turf Scrubber® Technology Advantages • Increased Pollutant Removal Rates • Reduced Land Requirements • Reduced Treatments Costs • Quantifiable Performance
  30. 30. Reduced Land Requirements - Nitrogen [1] HydroMentia. April 2005. Single Stage Algal Turf Scrubber Present Worth Cost & By-Product Market Analysis. (TPIN=311 ppb, LHLR = 18.8 gpm/lf, TNREMOVAL= 6,440 lbs/acre-year) [2] Treatment Wetlands estimated average nitrogen removal rate of 145 lbs/acre-year based on Everglades STA WY 2004 treatment performance.
  31. 31. Nitrogen Reduction Cost Effectiveness
  32. 32. Technology Applications • Regional Stormwater Treatment Systems • Wastewater Treatment System Upgrades • Surface Water Restoration
  33. 33. Opportunity “In the middle of every difficulty lies opportunity.” Albert Einstein

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