Brew Jacket

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Natebriscoe
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Brew Jacket

Postby Natebriscoe » Mon Apr 24, 2017 11:56 am

What is everyone's opinion on hard anodized for oxidation reactions?
http://www.brewjacket.com
Seems like like a no go to me, but my chemistry is limited.
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Cavpilot2000
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Re: Brew Jacket

Postby Cavpilot2000 » Mon Apr 24, 2017 12:19 pm

I would think the hard anodizing would offer a degree of protection from Fenton-like reactions.
But I could be totally wrong.
I'm not sure how much it really matters on the cold side anyway, you've already pumped pure oxygen into the primary fermenter and yeast are actively scavenging.
But I'm far from an expert.
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Cavpilot2000
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Re: Brew Jacket

Postby Cavpilot2000 » Tue Apr 25, 2017 12:55 pm

It is also worth noting that I am currently using a Brewjacket for some of my beers due to space constraints in my ferm cooler, and I have definitely noticed the expected improvements from Low O2 brewing. For instance, my fresh Kellerbier tastes light straight up fresh toasted bread right now, and it spent a week and a half with the Brewjacket Immersion in contact.
If hard-anodized aluminum is, infact, an oxidizer, then maybe my hypothesis about the yeast protecting the beer has merit.

I'd love to hear from those with a better understanding of the metallurgical chemistry.
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Weizenberg
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Re: Brew Jacket

Postby Weizenberg » Tue Apr 25, 2017 2:02 pm

In the German brewing literature, what is referred to as LODO or low oxygen brewing here is often described as "Intert method" or "Intert mashing". Bearing this in mind, it should give a useful reminder when in doubt what's suitable ;)
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Cavpilot2000
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Re: Brew Jacket

Postby Cavpilot2000 » Tue Apr 25, 2017 2:38 pm

Doesn't anodizing make the surface inert?
I'm asking genuinely, not being cheeky.
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Bilsch
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Re: Brew Jacket

Postby Bilsch » Tue Apr 25, 2017 4:05 pm

Anodizing lays down a layer of aluminum oxide depending on how long and how much current is applied. I don't have any idea how that reacts with the beer though. It is interesting to note however anodized aluminum surfaces are almost never used on vessels in the chemical industry. So that would worry me a little.
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Weizenberg
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Re: Brew Jacket

Postby Weizenberg » Tue Apr 25, 2017 4:31 pm

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lupulus
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Re: Brew Jacket

Postby lupulus » Wed Apr 26, 2017 6:38 pm

I use it as a back up when my lager fridge is fermenting something else. I have done about 5 fermentations since early winter, 4 lagers and recently an ale. There are no flavor impacts to my taste or others that tasted the beers. BTW, using it in a 30L Speidel with about 22L of wort, it ferments lagers well in the Austin winter provided you precool the beer AND the jacket, but it is NOT a reliable lager method unless room temp is at or below 18-20C. For other fermenters, the rod may get deeper and provide better efficiency. I am planning to use them for ales and Kölsch / Alt from now on. They are a cheap way to control fermentation temp with the equipment I already have.
One problem is that it is not as simple to get a sample (opening the spigot) as taking it out of the jacket is a pain. Yes, I can take the cap out, fill a wine-thief and put it back, but the spigot is better :-). I have used bubble count as my method to decide when to transfer.
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Cavpilot2000
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Re: Brew Jacket

Postby Cavpilot2000 » Wed Apr 26, 2017 7:43 pm

lupulus wrote:I use it as a back up when my lager fridge is fermenting something else. I have done about 5 fermentations since early winter, 4 lagers and recently an ale. There are no flavor impacts to my taste or others that tasted the beers. BTW, using it in a 30L Speidel with about 22L of wort, it ferments lagers well in the Austin winter provided you precool the beer AND the jacket, but it is NOT a reliable lager method unless room temp is at or below 18-20C. For other fermenters, the rod may get deeper and provide better efficiency. I am planning to use them for ales and Kölsch / Alt from now on. They are a cheap way to control fermentation temp with the equipment I already have.
One problem is that it is not as simple to get a sample (opening the spigot) as taking it out of the jacket is a pain. Yes, I can take the cap out, fill a wine-thief and put it back, but the spigot is better :-). I have used bubble count as my method to decide when to transfer.


I use it in a corny keg (they make a lid for it now) when my other fridge is in use as well. My last lodo lagers have come out very well taste-wise (i've had other unrelated issues), and I do not think it acts as an oxidizer - the anodizing should inert it.
The nice thing about using it in a corny keg is that sampling IS easy. Hook up a gas line at 2 PSI or so, hook a picnic spout to the out post, and voila - samples all day long.
Is it ideal? No, but I don't have space for another or a bigger fermentation cooler, so it works as a "relatively" inexpensive and very space efficient way to ferment cool in almost any container.
And thus far it hasn't impacted low O2 flavors.
My two cents.
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Weizenberg
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Re: Brew Jacket

Postby Weizenberg » Thu Apr 27, 2017 2:49 am

Well, you can sample from proper beer kegs too and they are available in 20l. I'm gradually phasing out all my soda kegs. Thankfully, the 20l kegs from Schäfer are a drop-in replacement size-wise and fit perfectly into my existing chest freezer.

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