Duckweed biomass from duckweed growth was harvested from the pond
three times a week, keeping the pond covered by approximately
two layers of duckweed fronds. The biomass yields
were recorded and the compositions of duckweed plants were
analysed for four consecutive weeks from August 30 to
September 26, 2010 to evaluate the performance of the duckweed
culture system. The nutrient removal ability of the
duckweed system was evaluated by carrying out a mass
balance of NH4eN and o-PO4eP to the culture pon