The Biogas Plant is a location the appears in several versions of Farming Simulator. It is typically used for processing organic materials. See the version specific pages for more information.
The plant is also a drop off point for Grass and Chaff. The player can collect the grass/chaff using a loading wagon or a specialized header (respectively) and drive it to the Biogas plant to either store them in the Biogas Plant's large silo for making Silage or sell them.