Gushing

Question 1

What is beer gushing?

Answer 1

Strong and uncontrolled release and subsequent rising of co2 bubbles in Beer

Question 2

What are some factors that may promote gushing?

Answer 2

Calcium oxalate crystals
Malt
Kieselguhr residues
Bottle shape
Hops/iso humolones

Question 3

Why is cold storage important for secondary gushing?

Answer 3

To allow for precipitation of calcium oxalate in the tank rather than the bottle

Question 4

What is primary gushing?

Answer 4

Caused by barely and wheat, particularly fusarium blight

Question 5

What are some ways to detect mold on incoming grain?

Answer 5

Microbiological methods listed on COA
Fusarium detection via PCR
Counting violet/red colored grains in a set amount of grain
Gushing tests (carlsberg and donhauser)

Question 6

Why is is important to keep iron low?

Answer 6

Because it contributes to secondary gushing

Question 7

What are some measures to prevent high iron concentration?

Answer 7

Large brites for blending
Coating brites with acidified water
First filtered beer into kegs