Phoslock Case Studies

Lake Lorene

AquaTechnex, LLC biologists along with Twin Lake HOA concluded the excess phosphorus concentrations in Lake Lorene needed to be reduced in order to improve water quality. The recommended in-situ approach for Lake Lorene was the application of the phosphorus locking technology Phoslock (applied June 2012). Water quality restoration has continue to improve with a 45% reduction in free reactive phosphorus(FRP), a 53% reduction in total phosphorus 9 months after application. The reduction of in water phosphorus concentrations in Lake Lorene demonstrated the ability of Phoslock initially inactivate FRP in the water column, immediately bind available phosphorus in the sediments and break the cycling of phosphorus in the lake.

Full Case Study (PDF)

Crooked Stick Golf Club (2011)

SePRO Corporation, in partnership with Crooked Stick Golf Club, Indiana, initiated a phosphorus mitigation program with Phoslock on June 23, 2011. The objective of the project was to reduce phosphorus levels and restore water quality in this pond. Total phosphorus level were measured at 182 ppb prior to application, dropped 58% to 76 ppb within 48 hours following application and two months later remained at levels 70% lower than pre-applications conditions.

Full Case Study (PDF)

1st U.S. Phoslock Application, California (2010)

Mason Lake, California had chronic water quality issues impacting the health and enjoyment of the waterbody. The lake management firm AquaTechnex selected the proactive solution of Phoslock to address the high levels of phosphorus (water & sediment) and reset the eutrophication clock of this lake. The Phoslock application resulted in a 45% reduction in total phosphorus one month after application, a reduction of ortho-phosphorus below limits of detection for 4 months following application and improved water clarity by 4 feet. This first operational application in the United States confirmed the international successes of Phoslock programs and demonstrated the impressive ability of this patented technology to bind phosphorus and restore water quality.

Full Case Study (PDF)

Silbersee, Germany (2009)

The Silbersee is a recreational lake near the German city of Bremen which was treated with Phoslock in November 2006. The lake was one of the first lakes in Germany to be treated with Phoslock and consequently is one of the earliest European case studies. Prior to the application had been regularly closed to recreational users during the summer months due to high internal phosphorus load in the lake and poor water quality. The aim of the application was therefore to reduce this internal phosphorus load and restore water quality. Since the application, phosphorus levels have been reduced significantly and the lake has remained open to recreational users without interruption. A small re-application of Phoslock was undertaken in November 2009 to capture new inputs of phosphorus.

Full Case Study (PDF)

Het Groene Eiland, Netherlands  (2009)

The lake at the “Het Groene Eiland” camping park near the town of Appeltern in the Netherlands.  The aim of the Phoslock application was to remove 110 kg and 31 kg of phosphorus from the available nutrient pool of both the water column and the releasable fraction of the sediment for the entire lake.  The lake was treated with Phoslock on the 16th and 17th of April 2008.   A planned low does second application was applied on the 31st of March 2009 to bind phosphorus unaccounted for in the first application.   The application of Phoslock® to “Het Groene Eiland” has reduced the overall phosphorus levels and restore water quality.  The lake has remained open for recreational use without interruption since the application of Phoslock.

Full Case Study (PDF)

Clatto Phoslock Report, Scotland (2009)

Clatto Reservoir is a former drinking water supply reservoir located on the outskirts of the city of Dundee in Scotland. In recent years, the reservoir has been used for a variety of recreational purposes, excessive phosphorus pollution has resulted in the reservoir to be closed for extended periods of time due to concerns about public health and safety. Keen to find a solution to this problem, the Dundee City Council commissioned an application of Phoslock in March 2009. The objective of the application was to remove the immediately and potentially available phosphorus from both the water column and sediments of the reservoir. The results of the application have been impressive and in 2009 the reservoir remained open to the public for the first time in several years during the peak summer period of June to August.

Full Case Study (PDF)

Barensee, Germany  (2008)

The Bärensee is a popular lake used for swimming and fishing which is located within the largest camping area in the Federal German State of Hessen. Phoslock was applied to the lake on 12 and 13 June 2007 to bind phosphate in the water column and prevent phosphorus release from sediments. The application was performed by Bentophos GmbH, the licensee for Phoslock in Germany. In the six months following the treatment, total phosphorus levels dropped from 84 µg/L to 25 µg/L. In the three years since the application, the lake has remained open to swimmers water quality has been restored.

Full Case Study (PDF)

Phoslock Trial in Canning River, Australia  (2001)

The applications of Phoslock on impounded sections of the Canning and Vasse Rivers in 2000 and 2001 by the Western Australian Water and Rivers Commission, the Swan River Trust and CSIRO Land and Water were the first full scale applications of Phoslock and were undertaken as trials during the development of Phoslock to determine whether the application of Phoslock could significantly reduce phosphorus in the water column and sediments of these rivers. The applications resulted in reductions in phosphorus concentrations in the water column to below detection limits and substantial reductions in phosphorus efflux from sediments during the course of the trials.

Full Case Study (PDF)

Phoslock is not an algaecide. If an algae bloom is present, treat with a SePRO algaecide prior to a Phoslock application. Phoslock is a registered trademark of Phoslock Water Solutions Ltd.

Always read and follow label directions.