wetchicken6
Active Member
After I add the yeast to the wort in the fermentor, What type of setup works the best as an erator. Can you use a stone along with a aquirium pump? How long do you do this for?
With a pump, you should go at least half hour, more for bigger beers. If you are using an O2 tank, it only takes two minutes but you have to keep buying tanks.
The saturation point of using air is 8 ppm O2, which is typically achieved within 5 min. Aerating longer with an aquarium pump does not increase the amount of O2 in the wort. The only way to exceed this amount is to use pure O2. The amount you aerate with pure O2 will depend on the OG. I would avoid using an across the board time for pure O2 to avoid adding to much oxygen in lower gravity beers. Personally, I routinely use pure O2 to aerate my wort with different aeration times for different starting gravities.
The saturation point of using air is 8 ppm O2, which is typically achieved within 5 min. Aerating longer with an aquarium pump does not increase the amount of O2 in the wort. The only way to exceed this amount is to use pure O2. The amount you aerate with pure O2 will depend on the OG. I would avoid using an across the board time for pure O2 to avoid adding to much oxygen in lower gravity beers. Personally, I routinely use pure O2 to aerate my wort with different aeration times for different starting gravities.
After I add the yeast to the wort in the fermentor, What type of setup works the best as an erator. Can you use a stone along with a aquirium pump? How long do you do this for?
So this description on Morebeer's site is incorrect? http://morebeer.com/view_product/16607/102281/Aeration_System
Interesting. Do you have a table or chart showing ideal oxygenation times and/or ppm do based on gravity? That would be very handy.
That info is definitely incorrect according to CWs and JZs book on "Yeast."
Here is the info that came with my oxygenation kit.
"Open the valve regulator with stone submerged in the wort until the 0.5 micron bubbles can be seen (approx. 2-2.5 turns). Do not open excessively, large bubbles do not stay in solution effectively as fine."
5 gal pitched wort:
SG 1.040-1.050: 1 min
SG 1.050-1.060: 1.5 min
SG 1.060-1.070: 2 min
SG 1.070+ : 2.5-3 min + once additionally in 12-14 hours. (I believe this additional O2 should be about 1/4-1/2 of what was originally added at the beginning)
These schedules should yield 10-15 ppm dissolved O2.
I have not been doing the additional O2 at 12-14 hrs because I remember reading somewhere in BYO that according to JZ if you pitch enough yeast then this shouldn't be necessary. However, in "Yeast" he says this may be necessary. So, it seems a little conflicting to me.
I use the same wand from William's in which I originally purchased to aerate with an aquarium pump. When I switched to O2, the only place I could locate the regulator was from hop tech and it was only available with their oxygen kit. Therefore, these instructions are from them. I still use the Williams wand to disperse the O2 and I think 2-2.5 turns is about right, but you may need to play around with it. I would still target the generation of fine bubles and therefore these times should provide you the same results.
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