Starch from the aquatic plant duckweed (Spirodela Polyrhiza) is fermented to produce an organic protein meal for feedstock. Fermentation is accomplished first by grinding the collected duckweed (lemna) then by the addition of 2 enzymes (e.g., Alpha Amylase and Glucomylase) in a cooker. Yeast is added in the fermenter to produce ethanol. The solids are centrifuged out after distillation of the ethanol through a stripper column. After the ethanol is stripped the solids are centrifuged out and the remaining thin stillage is recycled back to the aquatic plant growing area. This high nitrogen organically produced thin stillage provides 100% of the nitrogen needed to grow the Aquatic plant, so the process can be made 100% self-sustaining and certified organic.
