How to store spent grain while waiting on your dryers

We are trying to develop a method to dry spent grains with a small DIY solar dryer. When we pick up the spent grain it is get too much volume for our dryer and then how to store it. Our drying process is very small and slow. We do not have the ability to freeze the spent grain.

We have developed and plan to use a 5-gal bucket system in which the lid pushes all the air out of the bucket. The lid has an airlock. We plan to put the spent grain in these 5-gal buckets with water, push the air out, put in the airlock and store them until the dryers are free to process the spent grain.

Our questions are: 1. Will this work?
2. Should we mix yeast or sugar into the buckets to keep them from spoiling?

We are not brewers, so this is all new to us. Thanks for any input

Topic spent-grain homebrew

Category Mac

1
answered at

Usually it will sour within hours of after being mashed unless dried or pasturized right away.

The only way I know to "preserve" it would be to boil it to kill the lactobacilla. Then sealing should preserve it awhile so it can be dried at a later time. But may not be worth it financially.

I'm not sure what your using it for.
Most that use it for feed just serve it up damp asap, animals generally know once lacto has turned it sour and don't touch it.

1. Water filled no, this will not work. The grain is already "infected", filling with water and using an air-lock is futile.

2. Adding sugar and yeast This also won't work as the grain already has lactobacilla, and it would consume the sugars before yeast could get started to make preservative alcohol.

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