The maceration is a very slow process of solid-liquid extraction that occurs at room temperature. it is realized by soaking the solid to extract with an opportune liquid, in a container called a macerator with the aim to extract soluble compounds responsible for odour and taste. The extractable compounds are extracted from the solid matrix of the extracting solvent through diffusion and because of osmosis due to prolonged contact. The solution must be desultory remixed, during the whole period of extraction, with the purpose of allowing the diffusion of the drawn out substances and avoiding the phenomenon of super saturation in proximity of the solid surface; this event has two negative effects: the extraction process can be blocked and some oxidative processes can be permitted (Nota et al., 2001; Dugo et al., 1998).