This summary table provides representative influent total nitrogen and total phosphorus concentrations for selected HydroMentia Algal Turf Scrubber® facilities and pilot studies. The values are intended to help reviewers interpret ATS performance in the context of source-water nutrient concentrations. Many HydroMentia ATS systems were operated on surface waters, treated effluents, blended waters, or post-treatment waters with nutrient concentrations substantially lower than those typically used in algae-growth or wastewater-treatment studies.
Where possible, values are based on mean influent concentrations reported for the primary monitoring or performance period. Notes are provided where values represent a specific operating period, pilot phase, blended influent, or other defined basis.
The facilities are sorted by influent total phosphorus concentration, from lowest to highest, because phosphorus reduction was the primary design driver for many of these projects.
| Facility | Source Water / Setting | Influent TN | Influent TP | Basis / Period |
|---|---|---|---|---|
| STA-1W ATS | STA-1W effluent / Post-STA Everglades polishing | 2.52 mg/L | 35 µg/L | August 13, 2008 to August 13, 2009 pilot monitoring period |
| Maryland Port Administration Algal Flow-Way | Dundalk Marine Terminal – Patapsco River / Baltimore Harbor surface water | 0.96 mg/L | 54 µg/L | May 23, 2019, through October 24, 2019 |
| Falls Lake ATS | Falls Lake surface water | 1.10 mg/L | 56 µg/L | December 29, 2015 to December 20, 2016 less-outliers |
| Egret Marsh ATS | Surface-water treatment / Indian River County | 0.95 mg/L | 62 µg/L | August 16, 2010 to August 29, 2011 |
| Lake Lawne In-Lake ATS | Lake Lawne surface water | 0.90 mg/L | 80 µg/L | April 8, 2009 through June 30, 2009 – Q2 performance evaluation period |
| Osprey Marsh ATS | South Relief Canal / RO Concentrate blended influent | 0.93 mg/L | 104 µg/L | CY2016 monitoring |
| Egret Marsh Pilot ATS | Lateral C Canal Water | 1.28 mg/L | 110 µg/L | March 2, 2005 to April 28, 2005 |
| PC-South/Osprey Marsh ATS Pilot | South Relief Canal / RO Concentrate blended influent | 0.89 mg/L | 135 µg/L | January 24, 2011 to August 8, 2011 |
| Powell Creek ATS | Powell Creek By-Pass Canal / Caloosahatchee River / Estuary | 0.95 mg/L | 139 µg/L | December 4, 2010 to December 10, 2010 |
| Santa Fe ATS | Santa Fe River water | 1.07 mg/L | 254 µg/L | February 16, 2010 to February 22, 2011 |
| Taylor Creek ATS | Taylor Creek | 1.75 mg/L | 367 µg/L | January 22, 2007 to January 18, 2010 |
| NYCDEP Rockaway ATS | Rockaway Municipal wastewater treatment plant flow | 13.72 mg/L | 1,070 µg/L | October 12, 2010 to December 13, 2011 Rockaway PS-ATS monitoring basis |