Wet Spent Grains

Spent grains are a by-product from brewing processes. They are either collected as wet waste material or conveyed to a spent grains drying system. Depending on the quantity and the time available for conveying, spent grains are either directly discharged from the lauter tun (or the mash filter) to a conveying screw, or stored in a buffer tank.

Buffer tank
A buffer tank enables fast emptying of spent grains from the lauter tun using a screw positioned in the flanged-on conveyor housing. The lauter tun can be filled for the next brew after emptying, while the buffer can be emptied on a continuous basis.

Pneumatic conveying
The wet spent grains are pneumatically conveyed (plug conveying) from the buffer tank to a wet spent grains silo (discharge system) or a new buffer tank, before being fed to a screw press and to a spent grains dryer (Tube Bundle Dryer).

Storage
The storage tank before the screw press enables continuous operation of the press and dryer. Wet spent grains are discharged from the silo using a counting and registration system. After the drying process, the dried spent grains are fed to a silo from which the product is filled into bags or conveyed to a pelletizing system in order to reduce transport volume.