Designation (also Rotofermentator, Rototank) for a transverse drum-shaped fermentation tank, which is mainly used in the Red wine production is used. Either the container itself or a rod with blades attached to it is rotated. This will during the maceration the mash mixed up, a high one extraction of the phenols (Dyes, pigments and tannins) and also that fermentation accelerated. The carbon dioxide is derived through a valve. This is an alternative to the technique of overpumping (Immersion). Since the fermentation takes place in a closed system compared to open fermentation tanks, there is no oxygen contact. The cost-intensive system is mainly used in larger production plants such as the French one Burgundy and in the New world used.