O2 how long?

[Jmakep]

Ok got an O2 set up to oxygenated my wort ( can't stand shaking it anymore ). How long should I oxygenated it with the O2 heard anything from 10 seconds to 2 minutes.

 

[RM-MN]

Ok got an O2 set up to oxygenated my wort ( can't stand shaking it anymore ). How long should I oxygenated it with the O2 heard anything from 10 seconds to 2 minutes.

What kind of yeast will you be using? Will you have used a starter with liquid yeast? If using dry yeast did you rehydrate it? What will be the starting OG? How fast and well do you want it to ferment?

To make the best beer you want a certain amount of yeast to do the job. You can get that by using a small amount and letting them grow in the fermenter which will require oxygen. You can make a starter and pitch that because that will have the large amount of yeast already. You can use dry yeast and rehydrate it to get the amount of cells you need. If you make a beer with a high OG it will need more yeast than a low OG. How you add oxygen matters too. Will you use just a wand and make big bubbles or a oxygenating stone that makes more tiny bubbles? With all those variables to choose from, how can any of us rightly say you need a certain time with the O2?

 

[JonM]

I always do 60 seconds. I think I remember reading in Yeast that was an ideal not-too-much/not-too-little amount.

 

[BlueHouseBrewhaus]

There's a thread on here somewhere that references a study of oxygenation. Bottom line is that, even with a diffusion stone, it's pretty hard to over oxygenate. That said, I don't think I've heard of anyone doing more than 2 min of pure O2. One to two min should be fine.

 

[aarong]

Low gravity one minute high gravity 90s just a rule of thumb. In really high gravity there is talk of a second o2 injection(Chris Whites yeast book)

 

[Cyclman]

+1 on one minute. Unless it's super high gravity, then a 2nd minute at 12 hours.

 

[Qhrumphf]

I do 60-90 seconds for most beers (either super clean beers, or higher gravity beers get the higher end). For incredibly high gravity, I'll bump it up to 2 mins. I haven't tried the second blast 12 hours in, but I rarely do something high enough gravity to warrant it. Last beer that strong was 2-3 years ago.

 

[sky4meplease]

When I first started oxygenating wort and was trying to dial in the amount of time needed to get proper amounts into solution, I took samples to the waste water treatment facility in town and had them tested for ppm.
I found twenty seconds was plenty using a 2 micron stone with hardware store bottles to reach 8-10 ppm.

 

[alane1]

I usually oxygenate one second per gravity point, which on most of my beer is around 60 seconds(1.055-1.060)