FWS - Floating Island
- De-nitrification for Nitrate removal
- Total Suspended Solids (TSS) reduction
- Phosphorus reduction and sequestration
- Fish & Wildlife habitat, food, shade and protection
- Shoreline protection & Erosion Control
- Platform for plants: Terrestrial & Aquatic Plants
FWS-Floating Islands incorporate the very best features based on years of experience. Floating Islands are widely accepted as a highly versatile water quality stewardship tool and Best Management Practice (BMP). Floating Islands bio-mimic nature’s scientific mechanisms for improving water quality by providing a platform for plants and surface area for micro-organisms. At the same time they also provide other ecological benefits such as habitat for fish and wildlife, as well as beautification. With versatile design and engineering features, Floating Islands can be used for erosion control, wave breaking and structural platforms.
FWS-Floating Island enhancements:
- Increased tear strength 2 to 4 times that of other leading brands
- UV degradation reduced by 90% to nearly zero
- Modular design and new connector straps simplify field assembly
- New edge design looks better, eliminates exposed cuts where the material bond is weakest, provides a wetland planting edge and makes for easier wildlife access
Greater UV stabilization
Modular design easier to install
Aesthetically pleasing edge
Easier access for wildlife
|8ft by 5ft||8ft by 20ft|
|8ft by 10ft||10ft by 16ft|
|5ft by 16ft||10ft by 24ft|
|8ft by 15ft||15ft by 16ft|
Engineered Materials: All of our products are based on the use of specially engineered materials that provide a substratum with significant mass transfer features and large surface area to support diverse, robust periphyton biofilm communities. We design, engineer and manufacture our own materials.
Pricing & Design: We can custom design and build any size of Floating Island. For best value, we provide eight standard designs. Please contact us for custom designs and pricing.
FWS - Floating Islands are in use today to address water quality issues across watersheds with stormwater and agricultural runoff, freshwater dead zones, sewage clean up, and acid mining wastewater. As demonstrated in field-scale case studies, waterways containing FTWs remove contaminants such as ammonia, total nitrogen, total phosphorus, total organic carbon (TOC), biochemical/chemical oxygen demand (BOD/COD) and total suspended solids (TSS). Biofilm also has the proven ability to capture and sequester heavy metals and other toxic agents. For water quality improvement using FWS - Floating Islands, a spreadsheet model constructed from accumulated data is used to estimate either the floating island size(s) required to meet water quality objectives, or the effect on a waterway of a given floating island size.
FWS - Floating Islands are especially well suited for nitrate removal. The islands create an anoxic zone by blocking diffusion of oxygen from the air/water interface and by blocking oxygen generation from algal photosynthesis (Dodkins 2014). Oxygen consumption by microbial metabolism associated with the islands further reduces DO, creating the anoxic environment required for nitrate removal. The other requirement for nitrate removal is a source of organic carbon, which is supplied by the litter form the island plants.
For total nitrogen removal, pairing FWS - Floating Islands with the BioFil Filter creates a complete solution based on optimum efficiencies for both processes. The BioFil’s aerobic environment compliments the islands anoxic environment creating a synergistic pairing for highly efficient total nitrogen reduction.
Plant based remediation derives much of its effectives from the symbiotic relationship between plants and the microorganisms associated with them. The metabolites produced by microorganisms during degradation of organics, along with N and P, are absorbed by plants as a food source. Microorganisms in turn use the metabolites released through plant roots as a food source. This relationship produces a synergistic effect resulting in increased degradation rates and removal of organic chemicals from the water surrounding the plant root system.
Plants play a number of important roles in both nitrate removal and a multitude of other water quality aspects. With respect to nitrate removal, the major role of plants is to provide a source of organic carbon. In addition to carbon disposition, the plant roots i) intercept and filter particulates, aiding sedimentation, (ii) provide a large surface area for microorganisms and iii) alter the physico-chemical and chemical environment via the release of humic acids and through reducing DO exchange (acidity and lower oxygen increasing denitrification).
Numerous factors contribute to the choice of plant species for use in water quality processes. A primary consideration is to choose native plants that will thrive in the local environment. When the primary function of plants is to support denitrification, plants may be chosen for the quality of its litter. As an example, cattail litter is generally considered a better carbon source than bulrush litter.
Plants have been used effectively for pollution remediation on land for many years. Phytoremediation research has provided volumes of research documenting the ability of specific plant species to remove various chemical pollutants. FWS - Floating Islands provide the platform to utilize this powerful tool in the aquatic environment.
Living shorelines are intended to protect property by preventing erosion and/or reclaiming land frontage, providing habitat, encouraging recreation, enhancing natural beauty and reducing restoration costs. FTWs that are properly shaped and positioned meet all these objectives while avoiding some problems associated with traditional alternatives. Traditional designs using bulkheads and rock require heavy equipment and can cause significant destruction during installation, while FWS - Floating Islands are lightweight and can be positioned by hand. Bulkheads serve only as a protection barrier for living shoreline components; FWS - Floating Islands provide both the desired barrier and wave dampening, while simultaneously providing a soft area for plants and wildlife habitat. Wave energy is readily damped, as waves do not rebound off FWS - Floating Islands but are absorbed into the "soft" material.
The US State Department recognized FWS - Floating Islands as a Top 6 Innovative Water Technology at a March 21, 2014 Washington, DC celebration of World Water Day. The game-changing water technologies, developed by Americans, selected by an independent panel of experts, and presented at the Department of State included pioneering approaches to water treatment, purification, pumping, monitoring, testing, energy and nutrient recovery, and water plant design. Our Floating Island technology was included among the Top Six technology providers.
FWS - Floating Island projects have been completed in collaboration with the US Army Corps of Engineers, U.S. Geological Survey, Natural Resources Conservation Service, U.S. Forest Service, Government of Singapore, New Zealand’s National Institute of Water and Atmospheric Research, and many others with thousands of islands launched worldwide.