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"Immervoll" means always full and it is a kind of vessel used for fermentation etc. by wineries. It has a lid that fits inside the vessel and can be fixed in any position by pumping air in a tube. Now I've been thinking of getting two for my brewery as primary fermentation vessels. There's a few nice things one can do with them.
Ferment as usual, harvest yeast from the top. After the main part is done and krauesen is dropping lower the lid to just above liquid level. Add a second lid on the vessel. The CO2 produced will now be trapped between the two lids and O2 wil be pushed out as CO2 is heavier. When pumping the beer to the secondary tanks it will be covered by the CO2 blanket for the most part and it saves me pressurised tanks and buying CO2.
A bit more crazy thing to do is use them as a "Yorkshire square". Use a floating lid with a big hole in it. Lower the floating lid to just above the not yet fermenting wort. Once the fermentation starts the krausen will be pushed into the upper compartment, just like with a "square". Easy to harvest yeast. Could even do the circular pumping and spraying (rouser) the wort over the yeast.
Any thoughts?
Posted 34 days ago.
Edited 34 days ago by ingoogni
Really interesting, I have never seen anything quite like this.
Posted 34 days ago.
Reading again what I wrote I see I missed the point :) of course in a normal closed vat there is also the CO2 blanket, but it gets disturbed when pumping due to the air intake. This generates quite some turbulence. I hope the floating lid reduces that turbulence and the lid literally floats on the beer on its way out and shields it for most part from the environment.
Mmm, thinking about it, I could attach a big plastic bag at the lid and catch "all" the CO2. The bag wouldn't stick out of the vessel as they are about twice as big as the amount of beer. 100% headspace.
Posted 34 days ago.
If I understand what you're looking to do, I'm not really sure I see why you'd need this vessel. You can do CO2 capture with any vessel. Better Bottle has a diagram at http://www.better-bottle.com/products_master.html. Go to How To->Racking->O2 free transfer.
You're basically going to take a hose off your air lock and plumb it to the inlet valve of your secondary/bright tank/racking vessel. The CO2 fills from the bottom and pushes out the O2. When you go to transfer, you can close loop it as shown on the BB page, use pressurized CO2, or a transfer pump. The receiving vessel should have a layer of "free" CO2 you're racking into so you have less O2 pickup.
Posted 34 days ago.
| Better Bottle has a diagram
Yes, that is the way to do it with closed vessels and pressure less. What I'm looking into is flexibility in fermentation style, closed and a more open style maybe even fully open. The Immervoll is about 500 liters. My main reason for an open top vessel is easy harvesting the best possible yeast, non conical closed vessels are a pain. Conicals ....
In a small scale production environment you won't have an empty lagering vessel to store the CO2, but some kind of bellows will do when in need. 2 fermenters, four lager tanks and two brights.
Posted 34 days ago.
I think I'm a little lost as to what you're trying to accomplish then. Maybe a diagram would help or maybe my brain is just fried right now.
Posted 34 days ago.
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