Brewing a Bavarian Helles

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Ancient Abbey
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Re: Brewing a Bavarian Helles

Postby Ancient Abbey » Mon Oct 31, 2016 4:51 pm

Bilsch wrote:Just tapped my best helles to date. Loaded with fresh malt aroma and flavor. The only fault I think its a bit muddy with too many malts, and will redo this without the munich possibly with superpima instead.
Grain bill: 80.8 pils Barke, 9.6% vima, 5.1% muma1 Barke, 2% C25, 2.5% am

Yeah, clean peaks is the way to go.
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bjanat
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Re: Brewing a Bavarian Helles

Postby bjanat » Wed Dec 28, 2016 8:53 am

Just thought this has a simple overview, don't know if it's been shared already. http://www.academia.edu/6928942/Produci ... plications


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caedus
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Re: Brewing a Bavarian Helles

Postby caedus » Wed Dec 28, 2016 3:01 pm

Very Cool, thanks for linking that.

I am very interested in the Co2 stripping methods, primarily because we almost all have aeration stones and Co2 on hand. I would think it would be easy enough to recirc with a stone near the pickup tube and see how long it takes to drop DO.
bjanat
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Re: Brewing a Bavarian Helles

Postby bjanat » Wed Dec 28, 2016 3:40 pm

Maybe split a tube and use several diffusion stones, as a DIY Rotary Jet Mixer? http://www.alfalaval.com/rotaryjetmixer http://www.alfalaval.com/globalassets/d ... -story.pdf


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bjanat
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Brewing a Bavarian Helles

Postby bjanat » Wed Dec 28, 2016 3:43 pm

Or maybe glueing something like this to a speidel BM? I have a friend who works with industrial degassing, he said this would be an effective method.
www.instructables.com/id/Home-Made-Ultr ... ning-Tank/

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caedus
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Re: Brewing a Bavarian Helles

Postby caedus » Wed Dec 28, 2016 3:52 pm

I was thinking about trying to get a CIP ball mounted to the underside of a kettle lid, then have a tee'd Co2 input with a carb stone on feeding the CIP ball.
Techbrau
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Re: Brewing a Bavarian Helles

Postby Techbrau » Wed Dec 28, 2016 11:10 pm

I am not sure how well just diffusing CO2 like that will work. Probably not very well.

Degassing columns need to be tall and narrow to be effective, and their design needs to take into account the dynamics of the flowing gas in order to prevent e.g. channeling where all of the gas just flows along the outside edge of the column and doesn't strip other gasses from the majority of the volume. Typically you also need to pull a vacuum from the top in order to get very low DO levels.

Of course once you actually have a well designed packed column in place, it's probably one of the most energy efficient ways of getting degassed water.
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bjanat
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Re: Brewing a Bavarian Helles

Postby bjanat » Thu Dec 29, 2016 1:40 am

How about any of these products? http://store.liqui-cel.com/


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Weizenberg
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Re: Brewing a Bavarian Helles

Postby Weizenberg » Thu Dec 29, 2016 3:28 am

bjanat wrote:How about any of these products? http://store.liqui-cel.com/


Membrane contactors are increasingly replacing packed columns in industry.

To strip oxygen you will need one with an X40 membrane from liquicell, as well as either a stripping gas or a vacuum pump with regulator.

But a cobtactor alone won't do. There are substantial engineering challenges.

The next hurdle is the system itself being oxygen free and allowing for minimum contact with oxygen during transfers etc. There are other disadvantages like our small vessel size, which proportionally puts more surface area of wort in contact with oxygen.

Over the years I've been indoctrinated not to throw things into my beer that should otherwise not be in there (Reinheitsgebot). But I concluded that it is way simpler and elegant to use sulfites as antioxidant in the process, whose use is almost impossible to detect since they are ab fermentation byproduct anyways (which now puts them in a grey zone as far as the RHG is concerned).

I cannot keep repeating how elegant techbrau's solution using sulfites is (I was there when the first tests were made).

Don't diss it! For the homebrewer sulfites remain the most elegant and cost-effective solution to-date.
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Bilsch
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Re: Brewing a Bavarian Helles

Postby Bilsch » Fri Dec 30, 2016 5:04 pm

Looking at the graphs of flow vs vacuum rate, with the smaller mini module contactors and just vacuum, you could approach nearly DO free water but your output rate would drop to ~50ml/min. That would be an agonizingly long wait for your brewing water. And as mentioned above if you didn't have a perfect oxygen free place to store the water while collecting...

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