Low O2 System Planning

All equipment-related discussion

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mpietropaoli
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Re: Low O2 System Planning

Postby mpietropaoli » Tue Jun 07, 2016 12:26 pm

Just thinking about this, as I will hopefully be trying a modified BIAB with lodo brewing soon. (2 vessel): Would it help if the bag with the grains were lightly/gently lowered into the strike liquor, as opposed to trying to run strike liquor very slowly INTO the mash tun with the grains/bag? Or would this be more of an opportunity for O2 ingress?
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bensonledbetter
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Re: RE: Re: Low O2 System Planning

Postby bensonledbetter » Tue Jun 07, 2016 2:22 pm

mpietropaoli wrote:Just thinking about this, as I will hopefully be trying a modified BIAB with lodo brewing soon. (2 vessel): Would it help if the bag with the grains were lightly/gently lowered into the strike liquor, as opposed to trying to run strike liquor very slowly INTO the mash tun with the grains/bag? Or would this be more of an opportunity for O2 ingress?


I've only done one low DO batch, and it is still fermenting in the keg, but I did exactly as you say and lowered the bag of grain slowly into the strike liquor. No floaters, indicating trapped air. This was standard procedure for me even before this batch. I believe @wobdee does something similar with their Braumeister.

And when I pulled the bag out, I have a ratchet pulley so I lifted it fractions of an inch at a time. No splashing, no dripping. Everything went smooth as butter.
Last edited by bensonledbetter on Tue Jun 07, 2016 2:22 pm, edited 1 time in total.
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Big Monk
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Re: Low O2 System Planning

Postby Big Monk » Tue Jun 07, 2016 2:25 pm

bensonledbetter wrote:
mpietropaoli wrote:Just thinking about this, as I will hopefully be trying a modified BIAB with lodo brewing soon. (2 vessel): Would it help if the bag with the grains were lightly/gently lowered into the strike liquor, as opposed to trying to run strike liquor very slowly INTO the mash tun with the grains/bag? Or would this be more of an opportunity for O2 ingress?


I've only done one low DO batch, and it is still fermenting in the keg, but I did exactly as you say and lowered the bag of grain slowly into the strike liquor. No floaters, indicating trapped air. This was standard procedure for me even before this batch. I believe @wodbe does something similar with their Braumeister.

And when I pulled the bag out, I have a ratchet pulley so I lifted it fractions of an inch at a time. No splashing, no dripping. Everything went smooth as butter.



I'm thinking that if I just stick with my cooler for now I won't even have to lift the bag. I'll just runoff right in the bag to the BK.
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Kit_B
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Re: Low O2 System Planning

Postby Kit_B » Tue Jun 07, 2016 4:05 pm

That's basically what I did, until I hooked up a pump.
...Bag inside a cooler & run into kettle.
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Big Monk
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Re: Low O2 System Planning

Postby Big Monk » Tue Jun 07, 2016 7:41 pm

Kit_B wrote:That's basically what I did, until I hooked up a pump.
...Bag inside a cooler & run into kettle.


I think I will still pursue the small 12vdc pump so that I can pump strike water in the outlet valve. They aren't expensive (~$18 shipped) and it will come in handy when I start upgrading components.

I must admit, as an engineer, I very much envy some of the shiny setups I've seen so far. I have GAS for sure but I'd rather get the fundamentals down with a basic set of equipment.
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Brandon
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Re: Low O2 System Planning

Postby Brandon » Tue Jun 07, 2016 8:10 pm

Big Monk wrote:
Kit_B wrote:That's basically what I did, until I hooked up a pump.
...Bag inside a cooler & run into kettle.


I must admit, as an engineer, I very much envy some of the shiny setups I've seen so far.


Don't. Simpler is better. I think a simple (I think back to my first Denny cooler batch sparge mash tun to brew APAs) set up like Techbrau's or ultra-ultimated like Bryan's are the way to go. I'm stuck in the middle and it's hell. Shiny? Yes. Automated? Semi. But has taken a lot to balance and keep in line.
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Ancient Abbey
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Re: Low O2 System Planning

Postby Ancient Abbey » Tue Jun 07, 2016 11:17 pm

Shiny, as in stainless steel, is a good thing. Shiny, as in complicated or expensive, is not necessary to brew lodo.
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Big Monk
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Re: Low O2 System Planning

Postby Big Monk » Wed Jun 08, 2016 5:09 am

Ancient Abbey wrote:Shiny, as in stainless steel, is a good thing. Shiny, as in complicated or expensive, is not necessary to brew lodo.


Very good to hear.
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Big Monk
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Low O2 System Planning

Postby Big Monk » Fri Jun 10, 2016 9:02 pm

Got the OK from the my wife and the boss has allotted me a couple hundred dollars to get the Low O2 brewery off the ground:

4 gallon MLT pot with bag and mash cap
3 gallon BK
Cam lock fittings
12v Recirc pump
Waring SB30 with Auber Mash/boil controller

My BrewDemon plastic conical fermentor into a 1.5 gallon torpedo with Perlick flow control faucet and spunding setup

STC1000 controlled 5 cu ft. Freezer.
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Big Monk
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Re: Low O2 System Planning

Postby Big Monk » Mon Jun 13, 2016 8:23 pm

Kit_B wrote:A problem that I would anticipate with a single-vessel system is the oxygen exposure/splashing/dripping that happens, upon removal of the grain bag.
But, this is only a guess, on my part.



I guess a DO reading before and after removal would be in order to know for sure.
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