V) Centrifuge (LS) and Distillation (SU). The scope of this step on LS is to separate the liquid and the solid fraction of the wet sludge deriving from the decanting step. It requires an electricity input of 126 Je/FU and affords a liquid layer (0.85 kg), sent to the rotary evaporator, and a sludge which is in its turn directed to the filtration step. In the SU process rotary evaporation is replaced by distillation that, with 1.7 MJt/FU energy demand, is one of the most energy demanding steps in the overall fish oil and organic fertilizer production route. Distillation allows to obtain the final 40 g of AnO and to recycle 1.21 kg of the solvent.