Co-Products

Question 1

Co-products

Answer 1

Useful or sellable materials produced alongside beer.
-Spent grain
-CO2
-Spent yeast

Question 2

Spent grains for animal feed

Answer 2

Great animal feed because of cellulose, sugars, proteins, and lipid content. Must comply with HACCP and local regulation.

Question 3

Spent grains as energy production

Answer 3

Burning dried grains to produce heat/electricity. Grains must first be dried, then burned in a boiler to produce steam, drive a generator, or feed into local supply network.

Question 4

Spent grains as biogas production

Answer 4

Microbes breakdown cellulose, hemicellulose, and sugars into methane gas in an anaerobic digestion plant.

Question 5

Spent grain for bioethanol production

Answer 5

Cellulose and hemicellulose pre-treated and fed into bioreactor full of fungus, which further break down cellulose into sugars which are fed to yeast, which gives us ethanol.

Question 6

CO2 collection and recovery

Answer 6

CO2 leaving fermenter is passed through washer, compressed, deodorized using activated carbon, condensed/liquified, and stored.

Question 7

Spent yeast as animal feed

Answer 7

First yeast must be killed with heat treatment. Can be sold directly as a slurry, or dried in a heated drum.