Algal Turf Scrubber® Feasibility Report for Falls Lake, NC.

October 25, 2013

City of Durham, North Carolina (October 25, 2013) – The Final Feasibility Report for application of the Algal Turf Scrubber® (ATS™) in the Falls Lake watershed was submitted to the City of Durham, North Carolina.

Falls Lake is a primary source of drinking water for Durham, Raleigh and surrounding cities. The goal of the study was to determine the feasibility of applying the Algal Turf Scrubber® (ATS™) technology for removing nutrients from two Durham County, North Carolina creeks in support of Falls Lake nutrient reduction goals.

A primary objective was to find sites where an ATS™ system could be located that optimized cost-effectiveness and nutrient load reduction. Project study areas were along Ellerbe and Little Lick Creeks and adjacent shoreline of Falls Lake in Durham. The City of Durham commissioned the feasibility study after determining that ATS™ had potential to be an effective tool in the effort to help it meet the Falls Lake Rules.

The Algal Turf Scrubber® Feasibility Study identified sites in the study area suitable for pilot scale and large-scale implementation.  The site suitability analysis, scoring and ranking of the candidate sites provided six (6) candidates that were recommended for ATS™ pilot implementation.

20-year Present Worth Cost (PWC) estimates for removal of nitrogen and phosphorus for ATS™ treatment facilities located at select sites were calculated based on application of a utility scale ATS™ systems handling 1.4, 1.8, 10 or 25 mgd . The Algal Turf Scrubber Design Model (ATSDEM) was employed to determine total annual load reduction and estimated cost of nutrient removal for modeled facilities. Optimal single facility nitrogen load reductions were projected to be near 24,000 lbs per year at a cost of $19 to $42 per pound. Optimal phosphorus load reductions were projected to be near 7,000 lbs per year at a cost of $67 to $173 per pound.

About HydroMentia Technologies, LLC

HydroMentia Technologies, LLC designs, builds and operates innovative, cost-effective, managed aquatic plant treatment systems for pollution control and water restoration in agricultural, industrial and urban applications. The Algal Turf Scrubber® is a proprietary technology available exclusively through HydroMentia, Inc. HydroMentia owns numerous patents and intellectual property. Its head office is in Ocala, Florida. For more information about HydroMentia Technologies, LLC go to

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