4
votes
Accepted
When to oxygenate when you delay pitching the yeast?
I would oxygenate (pure O2) right before or after the pitch.
Just because the process has the chance to introduce bacteria or wild yeast and it's best if the yeast is there to become dominate ...
- 18.5k
3
votes
Accepted
Lallemand says their dry yeast does not require aerated wort. Should I aerate anyway?
Honestly, this looks like a cut and paste and propbably doesn't differ much from thier other species of yeast that may benifiet from hard growth conditions.
Yeast needs oxygen for healthy growth. ...
- 18.5k
2
votes
Hooking a Tetra 77848 to an air stone
I wasn't able to find a good spec sheet for that pump, but a comment somewhere said the outlet is 1/8" (and that is typical), so 1/4" tubing is quite a bit larger than you want.
When aerating wort, ...
- 3,020
2
votes
Lallemand says their dry yeast does not require aerated wort. Should I aerate anyway?
It's important to note that they specifically say aeration is only unnecessary for 'first use'. This is very common for active dry yeasts, the reason being that most are grown under 'oxidative' ...
- 6,417
2
votes
Lallemand says their dry yeast does not require aerated wort. Should I aerate anyway?
There is almost never a need to aerate/oxygenate with dry yeast. The purpose if aeration is that the O2 is used by the yeast to synthesize sterols. Those keep the cell walls flexible to encourage ...
- 33.4k
2
votes
Accepted
GCB Materials on Cold Wort Aeration
'Wouldn't the relatively cool temperature of the wort actually increase the solubility of the oxygen, and so reduce the need for vigorous mixing?'
For sure. Looking at those revision notes, I think ...
- 6,417
1
vote
Is aerobic fermentation in beer brewing a myth?
1) Does aerobic fermentation has a place in this? If so, when and how, and where does the oxygen come from?
Aerobic metabolism is a more efficient pathway to convert the glucose to cellular energy ...
- 328
1
vote
Best time to transport wort in a car
I've conducted the mash and boil in one place and transported prior to fermentation in the past, with no issue. Yes, the drive will aerate some...but you will certainly need to aerate more prior to ...
- 11
1
vote
Accepted
Best time to transport wort in a car
I don't think there is a "better" here. Certainly the drive will help aerate, but I wouldn't rely on it. Shake the fermenter well before pitching.
On the other hand, jostling the already pitched ...
- 982
1
vote
Pitching/aerating stacked batches
I don't think there's any need to aerate the subsequent batches. Think about the purpose of aeration...the yeast use the oxygen to synthesize sterols which keep cell walls flexible for budding. But ...
- 33.4k
1
vote
Pitching/aerating stacked batches
Aeration/oxygenation is key. Without it yeast cannot grow successfully, which is basically the whole idea of batch fermentation (read: brewing). So, as you suspect, you really do need to do it.
The ...
- 6,417
Only top scored, non community-wiki answers of a minimum length are eligible