Help Support Aussie Homebrewer by donating:

  1. We have implemented the ability to gift someone a Supporting Membership now! When you access the Upgrade page there is now a 'Gift' button. Once you click that you can enter a username to gift an account Upgrade to. Great way to help support this forum plus give some kudos to anyone who has helped you.
    Dismiss Notice

Fermenting Under Pressure

Discussion in 'General Brewing Techniques' started by wobbly, 12/7/12.

 

  1. wide eyed and legless

    Pro Pro

    Joined:
    5/9/13
    Messages:
    6,486
    Likes Received:
    2,958
    Gender:
    Male
    Location:
    Mulgrave Victoria
    Posted 14/1/18
    Infection would be the most unlikely thing, the only person to blame for that is oneself, oxygen is the brewers biggest threat, doubtful we would be able to keep it out completely but keeping it to a minimal level should be our aim. Its the positive, not negative outlook that achieves results.
     
    Jack of all biers and Denobrew like this.
  2. rossbaker

    Well-Known Member

    Joined:
    21/5/13
    Messages:
    254
    Likes Received:
    24
    Posted 15/1/18
    Not necessary IMO if the lid has a pressure relief valve. You should be able to get a hose clamp on there easily enough and tie the bag to that. I've even had luck using a plastic cable tie.
     
    droid likes this.
  3. fdsaasdf

    Well-Known Member

    Joined:
    30/1/14
    Messages:
    734
    Likes Received:
    156
    Posted 15/1/18
    I add my dry hops at the start of primary fermentation when making hop-forward beers. Has been very successful and I've not noticed any fermentation stalling, or staling of aroma since I started doing this.
     
    droid likes this.
  4. droid

    somewhere on the slippery slope with a beer in han

    Joined:
    13/8/14
    Messages:
    2,090
    Likes Received:
    1,423
    Gender:
    Male
    Location:
    Eagle Point, VIC
    Posted 15/1/18
    beautiful - thanks, I'll hose clamp it
     
  5. droid

    somewhere on the slippery slope with a beer in han

    Joined:
    13/8/14
    Messages:
    2,090
    Likes Received:
    1,423
    Gender:
    Male
    Location:
    Eagle Point, VIC
    Posted 15/1/18
    it's a bit of a game-changer doing pressure ferments, can't wait till the weekend to try your technique, cheers
     
  6. Mardoo

    Noob What Craps On A Bit

    Joined:
    24/3/12
    Messages:
    6,653
    Likes Received:
    3,741
    Gender:
    Male
    Location:
    Outer Eastern Suburbs
    Posted 15/1/18
    They fit snugly on racetrack dip tubes, and need crimping on corny diptubes. The crimping makes me nervous as far as places for stuff to accumulate. However I haven’t worked out a better way yet. BTW I only have one on a corny, which I use for 10 L batches.

    I do have the screens on both ferment and dry hop. I figure on ferment it’ll keep any globs of yeast from clogging the post. However, I haven’t had that happen yet, so it may just be precautionary, aka paranoid ;)
     
  7. Mardoo

    Noob What Craps On A Bit

    Joined:
    24/3/12
    Messages:
    6,653
    Likes Received:
    3,741
    Gender:
    Male
    Location:
    Outer Eastern Suburbs
    Posted 15/1/18
    I had a recent wild yeast infection in one if pressurised fermenters and dry hop keg. I am not looking forward to stripping them down and boiling everything in addition to chemical cleaning and sanitising.
     
  8. malt junkie

    Well-Known Member

    Joined:
    26/4/16
    Messages:
    1,618
    Likes Received:
    994
    Gender:
    Male
    Location:
    Latrobe, Vic
    Posted 15/1/18
    Have an IPA in cold crash, been that way for 10 days, arm in a cast so can't lift the bugger out! I'm get yeast blocks on it if I leave it for a day. Not too much of a concern .... it tastes so darn good, it may never get transfered(except to glass).
     
    mtb and Mardoo like this.
  9. Dan Pratt

    Well-Known Member

    Joined:
    28/1/10
    Messages:
    3,267
    Likes Received:
    1,258
    Gender:
    Male
    Posted 15/1/18
    are you doing this while under pressure ?
     
  10. fdsaasdf

    Well-Known Member

    Joined:
    30/1/14
    Messages:
    734
    Likes Received:
    156
    Posted 16/1/18
    Oops, lost track of which thread I was in there - generally no this is in my brewbucket, not under pressure. I have done this once in a 23L keg with a spunding valve set to 10psi and the beer turned out fine but I have no idea how long it took to ferment as I was out of town for a couple of weeks.
     
  11. wide eyed and legless

    Pro Pro

    Joined:
    5/9/13
    Messages:
    6,486
    Likes Received:
    2,958
    Gender:
    Male
    Location:
    Mulgrave Victoria
    Posted 18/1/18
    I now have eight fermenters redundant since doing closed fermentation using cubes, was going to go down to Plastic Man to buy the heavy duty 30 litre plastic drum with the metal clamp lid.
    Decided to pressure test one of the plastic fermenters I already have, filled with water and surprisingly took it up to 40 psi with no adverse effects. As I doubt very much I would be going higher than 10 to 15 psi have made the decision to use these as my fermenting vessels. The cubes I have filled with CO2 I am thinking of making a venturi to use on filling my bottles, searched the web and can't find anything where this has been trialed so fingers crossed this may work.
    006.JPG
    007.JPG
     
    krz and razz like this.
  12. Zorco

    Well-Known Member

    Joined:
    10/7/14
    Messages:
    2,006
    Likes Received:
    1,011
    Gender:
    Male
    Location:
    Brisbane
    Posted 18/1/18
    interesting test WEAL.
     
  13. f00b4r

    Well-Known Member

    Joined:
    28/10/14
    Messages:
    61
    Likes Received:
    14
    Gender:
    Male
    Location:
    Berlin
    Posted 19/1/18
    Has Kee or any of the other fermentasaurus people expanded on why they chose such a narrow range spunding valve?
     
  14. wide eyed and legless

    Pro Pro

    Joined:
    5/9/13
    Messages:
    6,486
    Likes Received:
    2,958
    Gender:
    Male
    Location:
    Mulgrave Victoria
    Posted 19/1/18
    Because it is the cheapest option, its worth paying the extra and getting away from the poppet type I need another one and I am going to get this one, it is expensive but being a diaphragm a lot more sensitive to the change in pressure.
    https://au.rs-online.com/web/p/pneumatic-pressure-relief-valve-function-fittings/3989114/
     
  15. wynnum1

    Well-Known Member

    Joined:
    27/9/09
    Messages:
    1,382
    Likes Received:
    180
    Posted 20/1/18
    Plastic does deteriorate .
     
  16. wide eyed and legless

    Pro Pro

    Joined:
    5/9/13
    Messages:
    6,486
    Likes Received:
    2,958
    Gender:
    Male
    Location:
    Mulgrave Victoria
    Posted 20/1/18
    So it does, but easily replaceable, and easily cleaned. 6 of the 8 I have I have had for 7 or 8 years, the only time they see any daylight is when they come out of the fermenting room for a scrub.
     
  17. Dan Pratt

    Well-Known Member

    Joined:
    28/1/10
    Messages:
    3,267
    Likes Received:
    1,258
    Gender:
    Male
    Posted 21/1/18
    Hey wide eyed, i read somewhere that if you carbonate with co2 stores from fermentation it can cause off flavours. Not sure where i read it i will try get the link. I questioned it becuase the beer can be carbonated naturally by capping the vessel but apparently when its stored something changes and it needs to be cleaned or something.
     
  18. wide eyed and legless

    Pro Pro

    Joined:
    5/9/13
    Messages:
    6,486
    Likes Received:
    2,958
    Gender:
    Male
    Location:
    Mulgrave Victoria
    Posted 21/1/18
  19. Dan Pratt

    Well-Known Member

    Joined:
    28/1/10
    Messages:
    3,267
    Likes Received:
    1,258
    Gender:
    Male
    Posted 21/1/18
    wide eyed and legless likes this.
  20. wide eyed and legless

    Pro Pro

    Joined:
    5/9/13
    Messages:
    6,486
    Likes Received:
    2,958
    Gender:
    Male
    Location:
    Mulgrave Victoria
    Posted 21/1/18
    Well there you go, I had read that before but the thing is it is so obvious, there is another article I read from around 1898 where they were discussing the same thing, the pressure was applied by submerging the blow off tube under mercury and getting about 7 psi pressure. The discussion covered recovering the alcohol which had been vented in the CO2 and also capturing the gas, both were considered to be savings and money makers for the brewery.
    http://onlinelibrary.wiley.com/doi/10.1002/j.2050-0416.1898.tb00042.x/pdf
     

Share This Page