LA County consulted AquaPlanet Foundation (APF) in regards to the resolution of poor water quality and a blue-green algae (cyanobacteria) bloom at Magic Johnson Lake. Our bioremediation team proposed the installation of Floating Treatment Wetlands (FTWs) as a biofilter with the purpose of long-term phytoremediation and bioaugmentation (microbial treatment).

On May 2014, we installed two 65 sq. ft. Floating Treatment Wetlands, on which we planted our carefully selected list of plants that we use for phytoremediation. The FTWs were placed in the path of the current that contained the algae bloom. In the middle of the FTWs, a pump with a drip system was installed that up-took the water from the current, distributing it evenly throughout the matrix. The vegetation that grew through the FTWs acts an important food source for invertebrates, tadpoles, and some fish. The matrix of the FTWs is composed of non-toxic, degradable recycled plastic, which provide a place for periphyton to flourish. Periphyton absorb contaminants, removing them from the water column and limiting their movement through the environment. Combined with the roots of the plants, the matrix of FTWs and porous texture also provide a perfect habitat for beneficial microbial colonization.

After the installment of the Floating Treament Wetlands, we began the application of microbes (bioaugmentation), which were selected specifically for the conditions of this lake. The FTWs were successful at harboring a dynamic environment for beneficial microbes and plants used for the degradation of water contaminants. Furthermore, they helped in carbon sequestration and absorption of greenhouse gasses. After a year, the islands were fully established. The vegetation was blooming while the condition of the water was restored to a healthy balance for its inhabitants.