The article introduces us to research on floating treatment wetlands (FTW) and discusses FTW's ability to reduce nutrient levels in lagoons, including small municipal systems with average flows between 12 - 16 gallons per minute.
These studies review and compare the effectiveness of applications in wastewater treatment lagoons, raw wastewater, ponds and lakes, and agricultural runoff into waterways. The earliest study conducted was for a Montana Board of Research and Commercialization Technology (MBRCT) grant. The Rehberg Ranch, a planned community near Billings Montana, is one of the sites for this FTW study.
Midwest Floating Island, LLC has published case studies summarizing FTW technology. Case studies include the Rehberg Ranch lagoon, McLean's Pit Landfill in New Zealand and an alternative nesting habitat in California.
The Midwest Floating Island FTWs are constructed of post-consumer polymer fibers, vegetated with native plants. FTWs mimic the ability of natural wetlands to clean water by bringing a "concentrated wetland effect" to any water body - in this case, an aerated wastewater lagoon.