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Old 02-01-2014, 11:30 AM   #21
Culln5
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Originally Posted by MaxOut View Post
Per your description above I'm assuming the wort in the BK has been cooled before transfer through O2 injection? I strongly suggest that it is or your absorption will be minimal at best. I few factors to consider with in-line injection that can effect O2 absorption and desired levels in finished wort are Temperature (cooler wort will absorb more O2), Gravity (bigger beers require more O2), Flow of wort across injection stone, Size of injection stone, Volume of O2 (LPM) etc. To calculate O2 absorption without measurement is a tricky game. Kinda like guessing the gravity of wort without a hydrometer, Good thing is with O2 its not as critical. In fact a little too much O2 is better than not enough.

That said I would set your flow to around 2GPM and your O2 at .5 - 1.5 LPM depending on the gravity and temp. My O2 stone is in a sight glass so I can see the wort moving by and the bubbles from the injection. The sight glass is especially helpful when starting the injection as sometimes you have to turn the flow up to get it going before you reduce it to the proper flow. It is also important if possible to fill your fermenter from the bottom. If your using a bucket or carboy put you line at the bottom. This allows the new oxygenated wort coming in a better chance of holding the O2 in and if it does come out it passes through the rest of the wort on its way up. Adding pure O2 is more about preservation and control for me as I want as little stress as possible on my yeast and I like the control factor for repeatability.
Thanks for the replies so far!....

Yes, the wort is cooled in the BK using an immersion chiller before being transferred to the primary.

Below is the regulator that purchased. As you can see it's only a single stage regulator so I won't be able to set the GPM, only the LPM. Will this be an issue?

George
o2-regulator.jpg  
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Old 02-01-2014, 03:32 PM   #22
stevehaun
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George:
Here is my procedure. I am not saying I am right or this is the only way. It is one way of doing it. I brew 30 gallon batches and pump my beer to a 40 gallon conical fermenter. I have a plate chiller. My inline oxygenator is positioned right after my plate chiller. I pump my chilled wort at about 1-1.5 gallons per minute. I run my O2 at 1.5 l/min for the first 10 minutes I am transfering the wort and then I shut it off. It is more art than science. I have never measured dissolved O2 in my wort but I do get good fermentations. Before I bought a conical fermenter, I fermented in three 14 gallon HDPE barrels. I used an oxygenation wand and gave each barrel about 2 min of O2. That was much simpler and I prefer that to inline oxygenation. However my conical is in an upright freezer and I cannot use an oxygenation wand so I am stuck with inline oxygenation.
With regards to your original question, I don't think it matters which configuration you use.
Have fun!

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Old 02-08-2014, 11:46 AM   #23
Culln5
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Well I'm going to give my in-line oxygen stone a test drive tomorrow on a 1.061 OG Vanilla Smoked Whiskey Porter (5 gallon). My brew partner will be brewing also and will be using my set up.....

I plan to inject two rounds of .5 LPM for 30 seconds. Does this sound effective?

Can I boil the oxygen stone attached to the tee or should it be broken down and boiled separately between batches and before storage?

George

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Old 02-12-2014, 12:57 PM   #24
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Man was that impressive! It was immediately visible that the O2 stone was doing it's job. I'm glad I made this addition and hope that it makes a difference.

George

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