Common Contracts
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Inter-Agency Agreement to Conduct Scientific Studies Relevant to the Stormwater Treatment Areas Agreement No. 4600003125February 5th, 2014
Presence of a periphyton community adapted to low water column P concentrations is considered the central element that leads to superior P removal performance by the periphyton- based stormwater treatment area (PSTA) technology. Periphyton communities are complex assemblages of cyanobacteria, eubacteria, diatoms and eukaryotic algae and are found in lakes, streams and wetlands, including the marshes of the Everglades (McCormick and O’Dell 1996). Several characteristics of periphyton communities make them well suited for biological treatment of surface waters in wetlands (Dodds 2003). Periphyton typically have a high affinity for P and respond to P inputs more rapidly than other wetland components (macrophytes, soils) and thus are important in the uptake and storage of P (McCormick et al. 1996). Typically, periphyton growth in PSTA systems is encouraged by several design features, including a benthic surface dominated by calcitic minerals, typically limerock; limited densities of emerge
