01716naa a2200241 a 450000100080000000500110000800800410001910000200006024501330008026000090021352010240022265000110124665000130125765000120127065300180128265300230130065300220132365300160134570000200136170000200138170000200140177300530142119396042012-11-13       2012    bl uuuu     u00u1 u    #d1 aMOHEDANO, R. A.  aHigh nutrient removal rate from swine wastes and protein biomass production by full-scale duckweed ponds.h[electronic resource]  c2012  aDuckweed ponds have been successfully used in swine waste polishing, generating a biomass with high protein content. Therefore, the present study evaluated the efficiency of two full-scale duckweed ponds considering nutrient recovery from a piggery farm effluent (produced by 300 animals), as well as the biomass yield and crude protein (CP) content. A significant improvement in the effluent quality was observed, with the removal of 98.0% of the TKN (Total Kjeldahl Nitrogen) and 98.8% of the TP (Total Phosphorous), on average. The observed nitrogen removal rate is one of the highest reported (4.4 g/m2day of TKN). Additionally, the dissolved oxygen level rose from 0.0 to 3.0 mg/L, on average. The two ponds together produced over 13 tons of biomass (68 t/hayear of dry biomass), with 35% crude protein content. Because of the excellent nutrient removal and protein biomass production, the duckweed ponds revealed a great potential for the polishing and valorisation of swine waste, under the presented conditions.  aWastes  aBiomassa  aEsterco  aDuckweed pond  aLandoltia punctata  aNutrient recovery  aSwine waste1 aCOSTA, R. H. R.1 aMATOS, F. T. de1 aBELLI FILHO, P.  tBioresource Technologygv. 112, p. 98-104, 2012.