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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
POINT SOURCES
•Technology Upgrades
NON POINT SOURCES
•Best Management Practices
•Regional Treatment Systems
•Chemical Treatment
•Managed Aquatic Plant Systems
•Treatment Wetlands
Phosphorus and NitrogenTreatment Alternatives
Algal Turf Scrubber® History
ATS™ Influent Flume and Surgers
ATS™ Effluent Flume
ATS™ Pump Station
Algal Turf Scrubber (ATSTM) (2.0% and 1.5% Slope)
Algal Turf Scrubber® (ATS™)
Algal Turf Scrubber® Inflow
Algal Turf Production
Algal Turf Production
Algal Turf Scrubber® Solids Management
Centralized Solids Recovery and Management
Algal Residuals Product Applications
Compost Production
Florida Algal Turf Scrubber® Systems
Taylor Creek Algal Turf Scrubber® Regional Stormwater Treatment Facility
Taylor Creek Algal Turf Scrubber® - 15 MGDOkeechobee County, Florida
Taylor Creek Algal Turf Scrubber® - 15 MGD
Taylor Creek Algal Turf Scrubber® - 15 MGD
Taylor Creek Algal Turf Scrubber® - 15 MGD
Egret Marsh Algal Turf Scrubber® Regional Stormwater Treatment Facility
Egret Marsh Algal Turf Scrubber® - 10 MGDIndian River County, Florida
Algal Turf Scrubber®Phosphorus Control
Algal Turf Scrubber® and Treatment Wetlands Relationship of Phosphorus Mass Loading and Areal Removal Rate
Algal Turf Scrubber® Phosphorus Areal Removal Rates for Three ATS™ Units (300’ Floway) Operated at Varying Hydraulic Loading Rates
Algal Turf Scrubber®Nitrogen Control
Algal Turf Scrubber® Relationship of Nitrogen Inflow Mass Loading and Areal Removal Rate at High HLR
Algal Turf Scrubber® Relationship of Nitrogen Inflow Concentration and Areal Removal Rate
Nitrogen Areal Removal Rate for Algal Turf Scrubber® and Constructed Treatment Wetlands
Algal Turf Scrubber®50-Yr 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.
Peer Reviewed Present Worth Costs
“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.”
Johns, G. 2005. Cost-Effectiveness of ATS™ Systems with Comparison to RASTAs – Lake Okeechobee Watershed Project. Technical memorandum submitted to SFWMD.
Algal Turf Scrubber®Technology Advantages
• Increased Pollutant Removal Rates
• Reduced Land Requirements
• Reduced Treatments Costs
• Quantifiable Performance
[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.
Reduced Land Requirements - Nitrogen
Nitrogen Reduction Cost Effectiveness
Technology Applications
• Regional Stormwater Treatment Systems
• Wastewater Treatment System Upgrades
• Surface Water Restoration
Opportunity
“In the middle of every difficulty lies opportunity.”Albert Einstein
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