algal turf scrubber

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