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. 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
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.”