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MitchBastard

Cold crashing oxygen suck back?

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reading that when crashing, the fermentor will suck in air via various openings that co2 usually escapes from?? Yeah/nah?

surely there wouldn’t be much oxygen in a fridge space? 

This introduced oxygen can potentially lead to oxidation?  Yeh/nah?

can I just do up my FV lid nice and tight and plug up the hole to avoid this? Yeah/nah?

 

will my beer explode if I do this? Yeah/nah?

 

Is it beer o’clock yet? Yeah/yeah?

 

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Posted (edited)
17 minutes ago, MitchBastard said:

reading that when crashing, the fermentor will suck in air via various openings that co2 usually escapes from?? Yeah/nah?

surely there wouldn’t be much oxygen in a fridge space? 

This introduced oxygen can potentially lead to oxidation?  Yeh/nah?

can I just do up my FV lid nice and tight and plug up the hole to avoid this? Yeah/nah?

 

will my beer explode if I do this? Yeah/nah?

 

Is it beer o’clock yet? Yeah/yeah?

 

Yeah, but very little & Co2 created during brewing will still sit below the O2 protecting the beer, what do you think happens when you bottle!

Maybe, 21% O2 in air so if you have 100L of free air space in your fridge you have 21L of O2,

Nah, O2 is lighter than Co2 as above,

yeah, you could try if it makes you happy,

Nah, vessels under vacuum implode not explode!

Nah, Im on nigth shift later

 

Edited by Mikes15
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Posted (edited)

It will but in my experience it won't do any harm. Cold crashed probably over 100 batches so far and none of them exhibited the tell tale oxidation signs. 

I wouldn't do up the FV airtight. The pressure drop from the drop in temperature might cause issues in an airtight vessel. 

You won't have a CO2 blanket over the beer, the air will simply mix with whatever gases are already in the headspace, and a small amount of it probably gets reabsorbed into the beer, but as above it is highly unlikely to cause any problems. If it did regularly cause issues then it wouldn't be a very popular process. 

Edited by Otto Von Blotto

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If you buy a nitrogen cylinder you can flush the fridge with that and avoid the problem.
I have been doing that for years.

 

 

 

 

 

 

 

 

 

nah.

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On 8/12/2019 at 10:49 PM, Ben 10 said:

If you buy a nitrogen cylinder you can flush the fridge with that and avoid the problem.
I have been doing that for years.

That is a long time. So you found it did make a significant difference Ben?

Cheers,

Christina.

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On 8/13/2019 at 11:49 AM, Ben 10 said:

nah.

You missed that bit mate.

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