1, bean dregs fermentation: put bean dregs into a container, add appropriate amount of water and starter, stir evenly, and seal for fermentation. Gas will be produced in the fermentation process, so it needs to be vented regularly to avoid container explosion. Fermented bean dregs can be used as fertilizer or made into other bean products.

2. Drying of bean dregs: put the bean dregs into a dryer to dry, and the dried bean dregs can be preserved for a longer time and can be used as raw materials for feed or pet food.