What is the use for brewer spent grains?

Beer, of course, can be made from a wide range of grains. Most commonly wheat, barley, corn and rice are used. After the fermentation process, wet fiber, called spent brewer’s grain, is a waste residue.
As spent grain comes from the brewery it is high in moisture content, generally 78% to 86%. Sometimes the spent grain is pumped to a filter screen, like a sidehill, to drain off some of the free water. 

What is the use for brewer spent grains? Here are two methods as following:
 
The grain can be hauled to a farm, for use as animal feed. Small breweries frequently make arrangements for a farmer to pick up their spent grain. As spent grain comes from the brewery it is high in moisture content, generally 78% to 86%. usually it is dehydrated by the dewatering machine, called screw press, to drain off some of the free water, the press cake is sold in wet (moist) form. Usually a moisture content in the range of 68% to 70% is specified.
 
For larger breweries, they used to dry their spent grain down to 10% moisture and sell it, usually in pellet form, which can be the biomass pelleting fuel, efficiency and clear. It involves first pressing the waste and then drying the press cake in a rotary drum dryer. And it has various heating source, even can use the biomass pelleting as the heating source.