Bourbon - Animal Feed
At the bottom of the column stills the so-called setback accumulates. It consists of water, proteins, fats and the fibres of the mash, while lighter materials such as alcohol and esters are extracted over the head of the column still. This aqueous solution from the bottom is pumped out of the container below the column still from time to time.
First the fibres of the stillage are collected by filters. The remaining liquid is dried in large drums using hot steam. The solid parts that accumulate at the drum walls are then mechanically extracted and given to farmers as animal feed. The feed contains a lot of proteins, fats and trace elements.