Second Fermentation Flashcards
(12 cards)
Where does 2nd ferm occur?
same bottle which wine is sold
Why is liqueur de tirage added?
to achieve 2nd ferm
What is liqueur de tirage a mixture of?
-wine
-sugar
-cultured yeasts
-yeast nutrients
-clarifying agent (bentonite)
-alginate (seaweed extract that facilitates riddling)
What does the amount of sugar in ldt depend on?
degree of effervescence required
In most sparkling wines, what is the g of sucrose added?
24 g/l
What does yeast convert sugar to in the 2nd ferm?
alcohol
What is created as a by product of fermentation?
-carbon dioxide
-can’t escape from the bottle= pressure in bottle increases
What else does 2nd ferm require?
-inoculation of wine with cultured yeasts that can ferment in unfavourable conditions
What are the unfavourable conditions in 2nd ferm?
-9.5-11 abv
-16 degrees
-PH below 3
After ferm, important that yeast cells….
-flocculate readily= sediment efficiently removed by riddling
What happens after ltd added and inoculation?
-bottle sealed with crown cap
-crown cap holds small plastic pot in bottle to catch sediment
How long is the average 2nd ferm?
-4-6 weeks
-cooler temp= slower ferm (more complex?)
