The water content of wet distiller's grains is generally more than 80%, the transportation cost is high, and it is easy to pollute the environment. Before being made into feed, the wet distiller's grains need to be quickly dried with a distiller's grains dryer, and the wet distiller's grains with a water content of 80% can be quickly reduced to 10%, so that the feed can be processed or stored for a long time.

The dried distiller's grains are crushed and mixed evenly with other feeds, and the granular feeds are supported by a granulator or an extruder, and then packed into feeds.