TechBrew
May 9, 2023, 2:30am
3
fredthecat:
richard:
I know there have been many posts over the past years about the benefits of zinc and yeast nutrients vs servomyces. I learned something new today from watching the BeerSmith podcast with Chris White: Yeast Viability and Reuse with Chris White – BeerSmith Podcast #280 – BeerSmith™ Home Brewing Blog
Chris said that the form of zinc that is used in yeast nutrient binds with proteins so if you put it into the last 10 minutes of your boil, as usually recommended and as I do, it will bind to the proteins in the wort and get left behind with your trub (unless you dump all your trub into the fermenter). It should really be added on the cold side, but then you need to worry about sanitation and mix it with sterile water. Servomyces has the zinc bound up into dead yeast cells which protect the zinc from binding with the wort proteins, so you can add it to your boil and all that zinc will make it into the fermenter where the active yeast can get at it.
That was a bit of an eye opener for me. Zinc is not all the same.
good to know, ive found over the years putting together all these little details have helped me make better beer.
but youre suggesting potentially whirlpooling yeast nutrient?
lol, my one is yeastex simply due to convenience. thoughts anyone?
I don’t think whirlpooling yeast nutrient would work because the proteins are still there at that time. It should be added at the same time as the yeast, but that requires a sanitized addition.