Methods for moisture removal and pest control of grains
The present disclosure provides methods for treating one or more grains in an ethanol plant or alcohol brewery, methods of drying, cooling, disease control of dried distillers grains with soluble (DDG), barley, or brewer's spent grain (BSG), and a system for treating one or more grains in an ethanol plant or alcohol brewery by these disclosed methods.
1. A method of drying one or more spent grains in an ethanol plant or alcohol brewery, the method comprising: directing captured CO 2 from the ethanol plant or alcohol brewery into a spent grain stored in a grain storage facility, wherein the captured CO 2 is a byproduct of alcohol fermentation of a grain at the ethanol plant or alcohol brewery.
2. The method of claim 1 , wherein the CO 2 is captured CO 2 onsite at the ethanol plant or alcohol brewery through the alcohol fermentation of a stored grain.
3. The method of claim 1 , wherein the treatment is drying, cooling, disease control, or combinations thereof.
4. The method of claim 1 , wherein the captured CO 2 is a compressed gas, or a liquid, or provided at ambient temperature.
5. The method of claim 4 , wherein the captured CO 2 is liquified and is subsequently vaporized before being directed into the spent grains stored in the grain storage facility, drying the spent grains via the CO 2 refrigeration cycle.
6. The method of claim 4 , wherein the captured CO 2 is a liquid or is provided at ambient temperature for drying, cooling, or combinations thereof.
7. The method of claim 1 , wherein the grain is corn, dried distillers grains with soluble (DDG), barley, or brewer's spent grain (BSG).
8. The method of claim 1 , wherein the treating of spent grain serves to decrease energy use by 50% and reducing grain moisture removal by 1.5% to 15%.
9. The method of claim 8 , wherein the treating of spent grain serves to reduce an energy cost to remove grain moisture by up to 90%.
10. The method of claim 8 , wherein the use of greenhouse gas (GHG) to remove spent grain moisture is reduced by 90-95%.
11. The method of claim 1 , wherein the treating of the one or more spent grains includes a system comprising a control center, one or more ducts, and a CO 2 source.
12. The method of claim 11 , wherein the control center is connected to a CO 2 pressure regulator in communication with the one or more ducts, one or more fans, a CO 2 meter, and a vaporizer.
13. The system of claim 1 , wherein the spent grain has a 50% reduced curing period.
14. A method comprising:
providing an ethanol plant or alcohol brewery;
providing an alcohol fermentation of a grain facility on site at the ethanol plant or alcohol brewery;
capturing CO 2 produced from the alcohol fermentation of thermal energy generation of the grain facility;
providing a spent grain storage facility on site at the ethanol plant or alcohol brewery;
directing the CO 2 captured from the alcohol fermentation or thermal energy generation of spent grain facility through spent grain stored in the spent grain storage facility;
wherein the CO 2 directed through the spent grain serves to dry the spent grain stored in the spent grain storage facility; and
wherein the CO 2 directed through the grain serves to provide disease control of the spent grain stored in the spent grain storage facility.
15. The method of claim 14 , wherein the weight of CO 2 directed through the spent grain in the grain storage facility to the weight of CO 2 emitted by the facility is in the range of 1% to 20%.
16. The system of claim 14 , wherein the spent grain has a 50% reduced curing period.