III) Decanting (LS and SU). The aim of this process is to separate the two different fractions present in the 3 kg of puree deriving by the extraction step. The decanting step does not require energy inputs. The liquid layer (1.05 kg/FU, LS and 1.95 kg/FU, SU), contains the fish oil dissolved in limonene. The wet sludge (1.95 kg/FU, LS and 1.05 kg/FU, SU), contains water and limonene. The limonene:water ratio in the drying stage is calculated to be 1:4.9 in the LS and 1:7.5 in the SU, due the higher efficiency of the recovery on industrial scale.