What I've been getting at is having too much head space can give infection a chance to set in before the yeast can take over & produce enough co2 to fill the head space.
try doing 3 gallons in a 6.5 gallon bucket & tell me you're not worried about head space. Fermentation in those instances don't make enough co2 to protect the beer very quickly.
try doing 3 gallons in a 6.5 gallon bucket & tell me you're not worried about head space. Fermentation in those instances don't make enough co2 to protect the beer very quickly.
I brew 3 gallons in 6.5 gallon buckets every time i brew. No infection yet. How is the head space a concern in a sealed vessel? How does 3 gallons not ferment quickly enough to create CO2 off gas, but 5 gallons does???
Whether its 3 gallons or 5 gallons, they should theoretically produce CO2 at the same rate, providing off gas which in return will protect the beer underneath that layer of C02.
I will have co2 on hand for purging and maybe for bottles by the time I make beer. It's heavier than air so it should be a layer over the yeast as soon as fermentation starts. Or I could purge the fermenter before I add the wort. Would I have to aerate for the yeast if I have a decent starter already whirlpooled?
So I should aerate the liquid, then if I want to purge I can purge the airspace and install my airlock, cause the air space doesn't help the yeast at all, only aeration does?
While you might be producing co2 at the same rate,you won't be producing as much,due to the lower volume. Also,the co2 absorbes the o2,not mearly chasing it out the airlock. So the air in the head space must be absorbed by the co2 to protect the beer. Nasties generally need air to propogate. The sooner o2 is absorbed by the co2,the better.
That's the phalicy of common thinking. The gasses don't layer,they mix till the heavier gas absorbes the lighter one.
Nope. one of your bretheren on here that does research or something gave a long explaination on that one some time ago. Makes sense,as so many things in nature mix somehow rather than just layering. Our atmosphere is a perfect example. so if you've never heard of it,you weren't paying close attention. I got "A"'s in the living sciences. but they know even more mitty gritty details nowadays. So I remember some of this stuff.
What I've been getting at is having too much head space can give infection a chance to set in before the yeast can take over & produce enough co2 to fill the head space.
While you might be producing co2 at the same rate,you won't be producing as much,due to the lower volume. Also,the co2 absorbes the o2,not mearly chasing it out the airlock. So the air in the head space must be absorbed by the co2 to protect the beer. Nasties generally need air to propogate. The sooner o2 is absorbed by the co2,the better.
We also have to remember that o2 is driven out of wort during the boil. This of course is why we have to aerate it.And then of course,we have oenning the fermenter for SG readings,etc.
This I think starts the process over again,but to a smaller extent. Depending of course on how much one openns the fermenter as it gets closer to FG. This is how **** happens...
unionrdr said:try doing 3 gallons in a 6.5 gallon bucket & tell me you're not worried about head space. Fermentation in those instances don't make enough co2 to protect the beer very quickly.
i know. Try to read it through. I wish people didn't jump into a thread and start saying,wow, a disaster of a thread. lol.
I am actually hoping this is a troll thread
I forget what the rate of absorption is,but yeah. As the co2 is produced & off-gassed,it absorbes the o2 trapped in the head space. When the gass reaches the right pressure,you see bubbles in the airlock.
Yup. But by the time I got to collegein the early 80's,commII taught us to write the way we speak. IE,less formal,flowery language. It will then be easier to assimulate by the average reader. no need for science speak,in other words...To the others,it reads like we have an accord...
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