harvesting yeast from Kettle Sour

[Pdaigle]

Is it possible to harvest yeast from a kettle sour. Not sure what a low ph wort does to the yeast. Will it have different taste or would be the same as clean yeast?

 

[RPh_Guy]

Yes, you can harvest. There shouldn't be any flavor impact.

Cheers

 

[isomerization]

From Lallemand:

“From our R&D program we have observed strain specific differences related to fermentation performance in sour wort. Higher lactic acid concentrations tend to inhibit maltotriose metabolism resulting in reduced attenuation. But for maltotriose negative strains (i.e. Lallemand London or Windsor) we don't see any difference at all for attenuation or fermentation speed even up to 1% lactic acid. We haven't yet tested this for re-pitching, but I expect that maltotriose negative strains would likely perform well when re-pitching from sour fermentations.”

I would guess this is geared more towards repitching versus making a new starter though.