Now that's a thought?

Discussion in 'General Beer Brewing Discussion' started by Petrolhead, Feb 13, 2019.

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  1. Feb 13, 2019 #1

    Petrolhead

    Petrolhead

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    I was pottering in the Petrolhead Brewery last night and my eye happened to drift into the Petrolhead Garage. This is in a different part of the 10' x 8' workshop complex squeezed between the Petrolhead Joinery and the door.

    Behind various vital pieces of kit, that haven't been used recently, was my Oxy Acetylene set with an empty Acetylene bottle and whilst I was kicking myself that I didn't get a refill when I collected my CO2 bottle the penny dropped....I have oxygen for my wort. Happy days.

    Off to get the stone thingy from the goldfish bowl.
     
  2. Feb 13, 2019 #2

    AlDaviz

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    Is there a difference between o2 or c02 that can be used in food and industrial ??
    I’m guessing there is ££
     
  3. Feb 13, 2019 #3

    Petrolhead

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    ISTR that the difference is the cylinder not the gas quality, but happy to give it a try.
     
  4. Feb 13, 2019 #4

    Dutto

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    There is no difference according to this link ...

    https://www.nytimes.com/2007/05/15/science/15qna.html

    BUT (there is always a "but") a bloke I once worked with told me how he had to watch a mate burn to death as his clothing caught fire and "I couldn't even help him. I had been working alongside him so I had to assume that my own clothes were saturated with oxygen as well."

    I therefore recommend that the normal safety procedures are applied when handling the oxygen!
     
  5. Feb 13, 2019 #5

    AlDaviz

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    This can happen, I can always remember an experiment when I was at school where a plastic bowl of washingup liquid was filled with oxygen thenognoted boom there was nothing left !!
    But I was thinking more of the purity ?
    Is it ok to use any c02 to purge your homebrew or is this a specially supplied item as per food products ?? Something I’ve not looked into as I’m not keggimg only bottling
     
  6. Feb 13, 2019 #6

    RichardM

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    Oxygen, oily rags or clothes and sources of ignition don't make for a happy ending
     
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  7. Feb 13, 2019 #7

    Dutto

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    Some Forum members use old CO2 Fire Extinguishers. Personally, I use a Sodastream CO2 bottle. It's more expensive but Skegness isn't the centre of the universe for compressed gases!
     
  8. Feb 14, 2019 #8

    -Bezza-

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    Could he not have taken his clothes off to save his burning friend??

    Back on topic, can I ask what purpose pumping oxygen through the wort achieves? I know people do it but other than the obvious "to get oxygen into the wort", I'm not clear on the circumstances in which a vigorous stir would be deemed insufficient.
     
  9. Feb 14, 2019 #9

    Zephyr259

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    The numbers are off the top of my head so I can't guarantee total accuracy but just aerating wort manually maxes out about 8 ppm dissolved oxygen which is the minimum recommended for the yeast. I'm assuming this is an "optimum health" kinda figure as I think a lot of folks would be lazy and not reach the max and still make decent beer. Bubbling pure oxygen lets you hit something daft like 40 ppm (maybe higher?) which can cause it's own problems with esters and/or fusels I think.
     
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  10. Feb 14, 2019 #10

    AlDaviz

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    Now never thought of that, I could fill the missus sofa stream bottles with beer and then carbonate !-)
     
  11. Feb 15, 2019 #11

    Dutto

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    If you'd ever seen a fire that is fuelled with oxygen you will understand why getting naked and going towards it is a definite no-no.

    The heat is intense, there is the uncertainty as to how much oxygen there is in the surrounding atmosphere and combustion won't go back to "normal" until all the excess oxygen has been consumed; so one of the first things you are taught is to run away from a fire that starts in an oxygen rich atmosphere!
     
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