Yeast storing doubt

[gsolnov]

Hi, last time I brewed, I think I pitched the yeast with the temp a little too high, and I think this produced a kind of sweet off flavor. I have yet to try the final beer to see how it tastes, but my doubt is the following: If I wash and stored this yeast, if I use it will it produce the same off flavor? (Supposing I pitch at the right temp this time, of course).
Thanks!

 

[flars]

Pitching at to high of temp and then fermenting to high won't produce sweet flavors. Sweet flavors are usually associated with under pitching and high FG leaving sugars in the beer.

The yeast will not hold the flavor. The trub that can come along with the yeast will have the flavor though. Impact on your next beer most likely would not be noticeable if it was used. Dilution would be to great.

A careful harvest will leave the trub in the fermentor.

 

[gsolnov]

I think I read somewhere than when yeast reproduce at the start of fermentation at high temps, they produce some fenols and esters that remain in the beer as an off flavor. I did not underpitch and my beer didn't have a high FG (it ended at 1.014).

 

[chickens4life]

I would bet that the sweet flavor is phenols or esters produced at the higher temp during reproduction. Did you tast any other slightly of flavors or excessive fruity/alcohol flavors? That would also be from the high starting ferment temp.

If that is the cause of your off flavors, that will not happen in the next generation assuming good pitching temp and rate.

 

[Gameface]

Hi, last time I brewed, I think I pitched the yeast with the temp a little too high, and I think this produced a kind of sweet off flavor. I have yet to try the final beer to see how it tastes, but my doubt is the following: If I wash and stored this yeast, if I use it will it produce the same off flavor? (Supposing I pitch at the right temp this time, of course).
Thanks!

Wort is very sweet. I'm not claiming a high-end palate or anything, but I'd have a hard time tasting wort and knowing how sweet the finished beer would be since it is so, so very different.

 

[gsolnov]

Thanks! Good to know the flavor wont be there. And yes I have yet to try the final beer, hope the flavor wont be there.


Enviado desde mi iPhone con Home Brew

 

[Warthaug]

The sweet/fruity flavors are esters, and were produced due to the higher fermentation temperatures. This is a common off flavor, but can be controlled with a combination of proper fermentation temperatures, oxygenation and yeast pitching rate.

The good news is that your washed yeast should be fine - the genes that make esters are always there, is the environmental factors (temps, O2) that largely determines the ester production.

Bryan