Air introduced during yeast dump?

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Air introduced during yeast dump?

Postby BrewinProf » Fri Jun 10, 2016 8:51 am

Hi everyone, I have a morebeer yeast harvester on my conical and during fermentation I empty it to remove the trub as well as to dump yeast that's settling out. However, since the harvester is a big air pocket, every time I dump it, it introduces air into the conical, and lately I've been wondering if that air could cause oxidation or off flavors. Do you think this is a problem? For those of you who use the harvester, how often do you dump your yeast?
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Re: Air introduced during yeast dump?

Postby DrWill » Wed Aug 10, 2016 11:13 am

BrewinProf wrote:Hi everyone, I have a morebeer yeast harvester on my conical and during fermentation I empty it to remove the trub as well as to dump yeast that's settling out. However, since the harvester is a big air pocket, every time I dump it, it introduces air into the conical, and lately I've been wondering if that air could cause oxidation or off flavors. Do you think this is a problem? For those of you who use the harvester, how often do you dump your yeast?


Likely the small amount of air involved (300ml) and the short contact time means there's no noticeable impact.
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Re: Air introduced during yeast dump?

Postby CA_Mouse » Fri Aug 12, 2016 11:48 pm

I've not had a noticeable amount of oxidized beer after dumping the trub and first settling yeast in my conicals. If you are overly concerned, you can always reserve some of the boiled wort and fill the harvester with that before re-attaching it or, if possible, purging the air with CO2.
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