AquaFlora Floating Wetlands have been designed to provide a green solution to improve the water quality through biological processes within their root systems. These processes are supported by the Xylit fiber which makes these floating wetlands unique.
Vast root systems promote biological processes which naturally support purification
With the highest density root system, AquaFlora Floating Wetlands provide a large surface area for the biological processes of microorganisms.
These processes can be described theoretically. In practice, they are always dynamic processes with diverse interactions that defy a simple description.
Bacteria break down and mineralize organic substances that dissolve in water. Thanks to the floating islands, the mineralized organic substances, mainly nitrogen and phosphorus, are absorbed by the plants, achieving an improvement in water quality.
Of the various biological processes, denitrification and phosphorus removal are the most important for water purification.
|Biological process||% reduction
|Nitrification (removal of BOD)||73-92 %|
|Denitrification (removal on N)||69-99 %|
|Phosphorous removal||38-69 %|
Table with the % reduction of the main biological processes in AquaFlora Floating wetlands
The algae and microorganisms that are found in our systems become food for snails, molluscs, small crabs, dragon flies and that is the reason why we find a high density and diversity of macroinvertebrates in AquaFlora Floating Wetlands.
Macroinvertebrates are significant within the food chain as larger animals such as fish and birds rely on them as a food source. They are particularly important as an effective algae filter causing a reduction in the algae biomass and improving the visibility in water.
Macroinvertebrates communities found in AquaFlora Floating Wetlands after 10 years of their installation.
(1: Gammarus pulex, 2: Lymnaea cf. Oblonga, 3: Libellula quadrimaculata, 4: Planorbida sp., 5: Bithyniidae sp.)
ESWEG group has participated in different projects in Europe, mainly Germany, France United Kingdom and Spain to demonstrate the water purification capacity of AquaFlora Floating Wetlands.
Installation of Xylit for a water purification experiment
Xylit fibers are fibers that are produced in large quantities as a by-product of lignite production.
The surface of the Xylit fibers offers, on the one hand, a high rate of phosphate and nitrate adsorption, a stabilization of the chemical and physical properties of water and a faster colonization of microorganisms (high biological activity).
As we now know from many studies, Xylit fiber has a large surface area (in the case of organic substances) and a high adsorption rate of phosphate and nitrates. The adsorption rate per kg of Xylit was 12.9mg for phosphate and 22.4mg for nitrate.
||Nitrate (mg/L)||Microorganisms population|
Table "Nutrient Degradation and Development of Microorganisms"
Three days after filling with PO4-P with 2,0 mg/l the concentration in the water was reduced by approx. 85 %.