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Old 07-29-2005, 12:27 AM   #1
El Pistolero
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Default Wort Oxygenation

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Originally Posted by Radical Brewing - Randy Mosher
There are various ways to aerate chilled wort. Vigorous splashing, dribbling, or spraying the wort into the fermenter will add some oxygen. An aquarium pump with an air stone does a better job; a tank of oxygen is the geek solution and the way it's done at commercial breweries.
Well, end of story...it's the geek way for me. So after I get back from "borrowing" a spare oxygen tank from the local hospital, what do I do, bubble the O2 thru a (sanitized) airstone?


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Old 07-29-2005, 12:53 AM   #2
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Yes. The airstone will work great. BTW, I really like the geek attitude, although personally, I think pure O2 is overkill In any case, it will be way easier than shaking the carboy or bucket.



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Old 07-29-2005, 01:48 AM   #3
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sanatized, large cooking whisk

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Old 07-29-2005, 02:01 AM   #4
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Shaken and stirred.....

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Old 07-29-2005, 02:30 PM   #5
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i just use a $9 dollar bottle of Benzomatic O2 from Lowe's/Home Depot and the aeration stone from the HBS. the smaller O2 bubbles produced from the bottled oxygen are supposed to be better utilized by the yeasties. you turn it on, and run it depending on the SG of the brew your aerating. simple simple.

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Old 07-29-2005, 09:03 PM   #6
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I think the key to good aeration is small, slow, steady bubbles, with either air or oxygen. The thing you want is dissolved O2. If you aerate and end up with nothing but a big bunch of foam on top of the wort, then is isn't dissolved and isn't doing much good.

I use the Bernzomatic O2 cylinder (yes, geeky) with a metal aeration stone. I have the stone on the end of a wand. The stone produces the very tiny bubbles that have the best chance of dissolving. I turn on the O2 very low and then swirl the wand so that I get the whole carboy in a whirlpool action. The swirling action keeps the bubbles submerged for a longer period and gives them more of a chance to dissolve. After a few minutes, there is barely 1/4" of foam on top of the wort, which is really what you want. The air/O2 is in solution, not in the foam.

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Old 08-03-2005, 06:17 AM   #7
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for what its worth, the owner of the local homebrew store told me, wort oxygenation is only needed if you are using liquid yeast, dry yeast is pre oxygenated and won't benefit from adding more to the wort, but liquid yeast will take right off with the oxygenation.

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Old 08-03-2005, 07:00 PM   #8
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hhmm? i'd never heard that before. but, i've only used dry yeast once, and that was in my 1st brew. many moons ago.......

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Old 08-09-2005, 12:10 PM   #9
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Quote:
Originally Posted by DeRoux's Broux
i just use a $9 dollar bottle of Benzomatic O2 from Lowe's/Home Depot and the aeration stone from the HBS. the smaller O2 bubbles produced from the bottled oxygen are supposed to be better utilized by the yeasties. you turn it on, and run it depending on the SG of the brew your aerating. simple simple.
So you take your OG reading before you aerate?
Do you know of a table somewhere of OG vs bubble time?
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Old 08-09-2005, 01:49 PM   #10
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yep, prior to aerating and pitching. when you buy the aeration stone, it has a chart w/ it. i can look at mine and tell you what they are. to be honest with you, i just go for about 2 1/2 minutes. if it's a lager of high gravity brew, i'll go 3 1/2 minutes.



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