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  • Oxygen Inquiry for Aerating Wort

    This is what I received from my CO2/O2 guy.
    ........
    Here are some different options:

    OX 300 – Industrial oxygen. 99.7% $21.00

    OX UHP300 – Ultra high purity oxygen. 99.994% $102.50

    AI D300 – Dry Air. 20-22% oxygen. Balance nitrogen $25.00

    Forgetting about the pricing ..... which O2 is the best for aerating wort.

    Or can I use our Air Compressor... It has amazing air filtration going on
    ________________
    Matthew Steinberg
    Co-Founder
    Exhibit 'A' Brewing Co.
    Framingham, MA USA

    Head Brewer
    Filler of Vessels
    Seller of Liquid
    Barreled Beer Aging Specialist
    Yeast Wrangler
    Microbe Handler
    Malt Slinger
    Hop Sniffer
    Food Eater
    Music Listener

  • #2
    See this thread for info on this subject:

    oxygen: When to say when?

    Comment


    • #3
      Make sure if you use your compressor it is oil-less like a rotary screw not a reciprocating. You don't want any oil vapor getting in your wort.

      Comment


      • #4
        oxygen or air ?

        This question interests me too.

        Assuming the quality with respect to oil and other contaminants is ok, is there any advantage using pure oxygen as opposed to air to for wort aeration?

        Anyone out there made a direct comparison? I use air and tend to think the 20% oxygen is enough, am I wrong

        Comment


        • #5
          Yes, this has been thoroughly investigated. See the thread listed above. Air is better than pure oxygen for a variety of reasons.
          Last edited by crassbrauer; 11-14-2007, 11:41 AM.

          Comment


          • #6
            Not to take this thread on too much of a tangent but...

            In that thread crassbrauer mentioned there was a comment about not using medical grade O2 due to compounds that inhibit bacterial growth and affect the yeast. Is this an issue with using cylinders of medical grade air? Should I be looking at some other type of air in cylinders such as just plain compressed air that's been filtered?

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            • #7
              My curiosity has caused me to also get a bit off topic.

              I will probably look like an idiot for asking this, but from looking at the other thread on oxygen, I am under the impression that beer can become carcinogenic from over-oxygenating? Is this the implication? If so, please explain.

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              • #8
                As far as I know, it is very difficult to get enough oxygen in solution to begin causing problems, even using pure O2. for this reason i tihnk pure O2 is good, but the cost means you would want to use it efficiently. although, vigorous injection of clean and 'sterile' air would be fine for most brewing purposes.

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                • #9
                  Originally posted by crassbrauer
                  See this thread for info on this subject:

                  oxygen: When to say when?

                  I was born dumb and don't learn very fast. Please help me out, I can't find this thread

                  Comment


                  • #10
                    I clicked on "crassbrauer", went to "find all posts by crassbrauer", and it was about halfway down page five.
                    Paul Thomas
                    Brewer
                    Sockeye Brewing
                    www.sockeyebrew.com

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                    • #11
                      Medical Grade O2

                      At my first brewing job the owners wife was a Veterinarian and we got medical grade O2 the first few brews using her account. The beer turned out fine, but we later found out we could have caused her to loose her Vet License, apparently you basically need a prescription to get it.
                      Jeff Byrne

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                      • #12
                        Originally posted by aswissbrewer
                        I was born dumb and don't learn very fast. Please help me out, I can't find this thread

                        and

                        Comment


                        • #13
                          The key to any wort aeration or oxygen is to make sure the gas is broken into fine enough bubbles to ensure the oxygen dissolves fully. If it isn't dissolved - the yeast isn't going to be able to use it of course. If necessary, put some form of back pressure control valve / restriction in the wort main after the injection point.

                          As said before - air is fine up to about 8 ppm, but some yeast strains require more O2 to remain healthy. If you cannot repitch the yeast successfully, try increasing the oxygen level. Food grade oxygen is OK, no point in spending money on medical grade oxygen. You may have a problem getting medical O2 because of concerns about wort / yeast etc getting back into the oxygen cylinders. They don't seem to be quite so worried about food grade oxygen.

                          Don't forget to ensure the oxygen / air injection system can be cleaned & sterilised regularly, just in case there is any backflow of wort.
                          dick

                          Comment


                          • #14
                            Welding O2 Ok

                            The Difference Between Medical Grade And Welding Grade Besides The Price Is Medical Grade Tank Has Never Seen Any Other Gas But O2,welding Grade Its Possible That Other Trace Gas May Be Present.if Using A In Line .02 Stone At 12 To 20 Psi Looking At Site Glass For A Fine Steady Bubble.i Made In Line Compartment Of 2 In. Dia. About 6 Ins. Long Then Reduced To 1 Ins. Pipe Then Site Glass.this Process Should Provide Enough O2 In Your Wort.keep In Mind The More Pressure The Longer It Will Take To Cast Out.so Make Sure To Cast Out In Less Than 1 Hour To Keep In Line With Brewing Proper Brewing Practices . Cheers Don

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                            • #15
                              Looks like you've been in computer programming too long. All the programmers I have worked with capitalise every word. Get a life!! Go and hit the ski slopes - Big White must be open by now

                              cheers

                              (only joking about the get a life bit)
                              dick

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