Journal Of Animal And Plant Sciences, cilt.23, ss.261-270, 2013 (SCI Expanded İndekslerine Giren Dergi)
Struvite ( hexahydrate, MgNH4PO4.6H2O, MAP) recovered from up-flow anaerobic sludge blanket (UASB) pretreated (MgCl2.6H2O+KH2PO4, Mg2+:NH4+-N:PO43- -P=1:1:1, pH=9.0) was tested as a slow release fertilizer on the growth of four including garden rocket (Eruca sativa), (), () and () in a series of labscale greenhouse experiment. Pot trial tests indicated that rates of increase in fresh weights, dry weights and fresh heights of plants grown in soil fertilized with the recovered struvite were determined as 405%, 488%, and 51% for garden rocket; 154%, 191%, and 44% for dill; 152%, 379%, and 27% for fennel; 141%, 208%, and 22% for parsley, respectively, compared to the control pot. Results of a static bioassay test proved that the use of plants cultivated in MAP pots as the feeding material did not cause any acute symptoms or mortality in guppy fish (Lebistes reticulatus), and all survived and exhibited normal visual responses at the end of 170-h exposure. Findings of this study confirmed that the recovered struvite from UASB effluent provided a valuable slow release fertilizer for the agricultural use, resulting an edible multi-nutrient animal feed.