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**Revvy** · 07-03-2012, 08:21 PM

Quote:

Originally Posted by daksin

You're fine of course. I've actually heard now from two different yeast nerds that vorlaufing removes a large portion of lipids from the wort which are essential to yeast health, particularly in the lag/reproduction phase.

That doesn't make sense, because you're pouring everything right back into the mash tun. Are you sure that they aren't talking about some other process? All you do in a vourlauf is draining a few quarts of wort out of the bottom of your tun, till there are no husks, and pouring it back in the top of your tun, back into the mash. How would anything be "lost" if everything is going back in?

**daksin** · 07-03-2012, 08:28 PM

Quote:

Originally Posted by Revvy

That doesn't make sense, because you're pouring everything right back into the mash tun. Are you sure that they aren't talking about some other process? All you do in a vourlauf is draining a few quarts of wort out of the bottom of your tun, till there are no husks, and pouring it back in the top of your tun, back into the mash. How would anything be "lost" if everything is going back in?

Larger lipid coagulates could definitely bind to grain material on their way through the bed. Let me go grab the video clip that I saw most recently. Still, I don't know why there would be more lipids in the wort you pull out for vorlauf than in the rest of it. Just something I've heard more than once now from people who really know their yeast.

Edit: here's the BrewingTV episode- the vorlauf bit starts around 7:05 http://www.brewingtv.com/episodes/2011/8/10/brewing-tv-episode-42-kings-coolship.html

**eastoak** · 07-03-2012, 09:14 PM

i never vorlauf anymore, i go straight to the kettle. the resulting beer is as clear as it was when i did vorlauf so i never went back. the bits of grain don't seem to make any difference either so i feel like i'm all set in that department. the old "try it and see" test i guess is what i call it.

**biochemedic** · 07-03-2012, 10:50 PM

Quote:

Originally Posted by RainyDay

When I first started brewing, it seemed that every time I would bottle I'd get about half of the bottles filled before realizing I didnt prime the batch.

$hit, I just did something like this a few months ago, but it was with the acid blend addition for my cider. I made up a solution and painstakingly uncapped all the bottles and added in 1 ml of the stuff and recapped...sucked to have to do all the extra work, but the cider turned out great...