Environmental Engineering Reference
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6
5
Common bermuda grass
4
Tifton 85 bermuda grass
3
Wild Millet
2
1
St. Augustine grass
0
Giant Reed
Harvesting Date
Fig. 9.7 Potassium content of species grown at the commercial hog farm
9.3.6 New Research
A research project is being implemented in 2009 at the University of Georgia
Aquaculture research unit in Tifton, GA to evaluate the feasibility of using float-
ing vegetated mats to improve the quality of aquaculture wastewater. In commercial
aquaculture the water in the ponds must be periodically replaced with fresh water
to avoid build up of wastes from the fish or other aquatic species and accompa-
nying algal growth. The project is being conducted in 36 aquaculture tanks (the
same ones used for the first floating mat study). During 2008 a test was made to
determine plant species which potentially will grow well in aquaculture wastew-
ater (Fig. 9.8). Species tested included cattail, soft rush, maidencane, iris, canna
lilies, border grass, Tifton 85 bermuda grass, common bermuda grass, and bamboo.
Fig. 9.8 Iris growing in
aquaculture wastewater
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