Fusel alcohols

[linearcraig]

Do fusel alcohols get removed if you leave the FV for a while?

 

[PD]

as far as I'm aware. No.
Once made by the yeasts they remain.

 

[prolix]

no is the short answer, the yeast will clean up a lot of the stuff it makes but not fusels

beat me to it lol

 

[linearcraig]

Gah thought so just wanted to check.

What temp to they starting making them, I've heard some folk say over 25c

 

[graysalchemy]

Small quantities are made at 21-22c but when you get above that they become noticeable. As I have said before the precursors are formed if temps get too high in growth phase of the yeast cycle, so a wort not sufficiently chilled may be sufficient to cause problems.

At the end of the day there is no real way round keeping temps between 18-21c for an ale yeast.

 

[JKaranka]

Is this the same with Belgian yeasts and brews that are meant to be fermented high?

 

[Ceejay]

Yes, exactly the same. The best thing with Belgians is to start cool, then warm up to your target temp after the growth phase is over.