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Author Topic: Potassium metabisulfate  (Read 5175 times)

Big Monk

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Re: Potassium metabisulfate
« Reply #15 on: March 27, 2018, 08:52:38 pm »
I know Brewtan B is a similar product but I'm asking because I have K-meta on hand.
Thanks for all the replies.

I'll try next time, I already kegged Sunday.

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Just FYI: they aren’t similar products. BTB is gallotannin based and binds to specific substances and Sulfites are essentially oxygen scavengers.
Thank you sir, maybe I was tryimg to say they could be used for a similar purpose?

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No I don’t think so, at least not in the way originally described in the OP.
Understood.
Well I guess I should try it out and maybe put a bug in Marshals ear. Unless there has been an exBEERiment done already.

Thanks Big Monk.

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You don’t want to be adding BTB post boil. I mean you certainly could, but at that stage, you should have (read could have alternatively) removed most, if not all, of the compounds it will bind and precipitate. Take care of it upstream. EDIT: This is my opinion. If it’s being advocated by JF as a clarifier, far be it from to poo poo it. Sorry if I was unclear.

As far as adding sulfites, I would tighten up the cold side before adding sulfites to the keg. In reality, you’d be adding sulfites to counteract cold side Oxygen ingress. If after tightening up you feel you need margin, then add the Meta and make sure that you factor in additional K, Na, and SO4 Potential when dosing.
« Last Edit: March 27, 2018, 09:07:22 pm by Big Monk »

Offline Robert

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Re: Potassium metabisulfate
« Reply #16 on: March 27, 2018, 08:56:17 pm »
Back to K-meta,  CAN it be combined with finings?  Big Monk:  BTB  in the BBT:  Joe on MBAA podcast episode 40.
Rob Stein
Akron, Ohio

I'd rather have questions I can't answer than answers I can't question.

Big Monk

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Re: Potassium metabisulfate
« Reply #17 on: March 27, 2018, 09:01:34 pm »
Back to K-meta,  CAN it be combined with finings?  Big Monk:  BTB  in the BBT:  Joe on MBAA podcast episode 40.

I wish I could comment with experience but I:

a.) Don’t use finings or add sulfites except for the mash;

and

b.) Only use gallotannins in the mash.

Sorry.

Offline Robert

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Re: Potassium metabisulfate
« Reply #18 on: March 27, 2018, 09:11:54 pm »
I would agree that upstream is the place to address problems, but I found Joe's discussion interesting because (I have never seen this suggestion anywhere else in the promotional material for BTB) he suggests that there may be different goals optimally addressed by gallotannin  in multiple additions including post fermentation.  Not that I'm going to change my practices, but you may find it interesting too.
Rob Stein
Akron, Ohio

I'd rather have questions I can't answer than answers I can't question.

Big Monk

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Re: Potassium metabisulfate
« Reply #19 on: March 27, 2018, 09:14:39 pm »
I would agree that upstream is the place to address problems, but I found Joe's discussion interesting because (I have never seen this suggestion anywhere else in the promotional material for BTB) he suggests that there may be different goals optimally addressed by gallotannin  in multiple additions including post fermentation.  Not that I'm going to change my practices, but you may find it interesting too.

I bottle with extract remaining so I do things a bit differently. I’ll check out the podcast though. Won’t help me much to use GTs post ferm because I finish fermentation in the package!

Offline Robert

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Re: Potassium metabisulfate
« Reply #20 on: March 27, 2018, 09:31:07 pm »
Whether we use it or not,  it's knowledge, and that's good!
Rob Stein
Akron, Ohio

I'd rather have questions I can't answer than answers I can't question.

Offline hackrsackr

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Re: Potassium metabisulfate
« Reply #21 on: March 27, 2018, 10:09:10 pm »
Whether we use it or not,  it's knowledge, and that's good!

“And, knowing is half the battle.”
Every GI Joe episode ever

I’m pretty sure it’s FormanEk just for clarity, and to put some respEk on his name. He does a great job explaining BTBs origin, and uses thoroughly in that episode.

MBAA = beer porn for my ear holes.






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Offline curtdogg

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Re: Potassium metabisulfate
« Reply #22 on: March 27, 2018, 10:11:00 pm »
I know Brewtan B is a similar product but I'm asking because I have K-meta on hand.
Thanks for all the replies.

I'll try next time, I already kegged Sunday.

Sent from my SM-G930P using Tapatalk

Just FYI: they aren’t similar products. BTB is gallotannin based and binds to specific substances and Sulfites are essentially oxygen scavengers.
Thank you sir, maybe I was tryimg to say they could be used for a similar purpose?

Sent from my SM-G930P using Tapatalk

No I don’t think so, at least not in the way originally described in the OP.
Understood.
Well I guess I should try it out and maybe put a bug in Marshals ear. Unless there has been an exBEERiment done already.

Thanks Big Monk.

Sent from my SM-G930P using Tapatalk

You don’t want to be adding BTB post boil. I mean you certainly could, but at that stage, you should have (read could have alternatively) removed most, if not all, of the compounds it will bind and precipitate. Take care of it upstream. EDIT: This is my opinion. If it’s being advocated by JF as a clarifier, far be it from to poo poo it. Sorry if I was unclear.

As far as adding sulfites, I would tighten up the cold side before adding sulfites to the keg. In reality, you’d be adding sulfites to counteract cold side Oxygen ingress. If after tightening up you feel you need margin, then add the Meta and make sure that you factor in additional K, Na, and SO4 Potential when dosing.
I'm as tight as I can be with the equipment I have. I've been brewing for 3 years now so I'm still figuring things out. I more or less know that K-meta is used to help preserve wine so I posed the question to the beer folks to see what would come of it. So basically I got alot of info and wisdom from this post. I've read some about Brew tan on these forums but I am not ready to go there. In reading about methods of preservation, shelf life and LODO K-meta was mentioned for use in low 02. Although I don't have the knowledge time and or patients to get into LODO I figure why not adopt some of the easier to help my processes.

Cheers

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Offline curtdogg

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Re: Potassium metabisulfate
« Reply #23 on: March 27, 2018, 10:14:17 pm »
Whether we use it or not,  it's knowledge, and that's good!
Knowledge is power!

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Offline curtdogg

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Re: Potassium metabisulfate
« Reply #24 on: March 27, 2018, 10:16:13 pm »
Whether we use it or not,  it's knowledge, and that's good!

“And, knowing is half the battle.”
Every GI Joe episode ever

I’m pretty sure it’s FormanEk just for clarity, and to put some respEk on his name. He does a great job explaining BTBs origin, and uses thoroughly in that episode.

MBAA = beer porn for my ear holes.






Sent from my iPhone using Tapatalk
HA! I would guess that I may be the only person to catch your Birdman reference.

Sent from my SM-G930P using Tapatalk

Sweet home of the Beer Lords.

Offline hackrsackr

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Re: Potassium metabisulfate
« Reply #25 on: March 27, 2018, 10:21:39 pm »
Whether we use it or not,  it's knowledge, and that's good!

“And, knowing is half the battle.”
Every GI Joe episode ever

I’m pretty sure it’s FormanEk just for clarity, and to put some respEk on his name. He does a great job explaining BTBs origin, and uses thoroughly in that episode.

MBAA = beer porn for my ear holes.






Sent from my iPhone using Tapatalk
HA! I would guess that I may be the only person to catch your Birdman reference.

Sent from my SM-G930P using Tapatalk
that’s one more than I expected.


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Offline curtdogg

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Re: Potassium metabisulfate
« Reply #26 on: March 27, 2018, 10:23:17 pm »
Whether we use it or not,  it's knowledge, and that's good!

“And, knowing is half the battle.”
Every GI Joe episode ever

I’m pretty sure it’s FormanEk just for clarity, and to put some respEk on his name. He does a great job explaining BTBs origin, and uses thoroughly in that episode.

MBAA = beer porn for my ear holes.






Sent from my iPhone using Tapatalk
HA! I would guess that I may be the only person to catch your Birdman reference.

Sent from my SM-G930P using Tapatalk
that’s one more than I expected.


Sent from my iPhone using Tapatalk
I like your style!

Sent from my SM-G930P using Tapatalk

Sweet home of the Beer Lords.

Offline homoeccentricus

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Re: Potassium metabisulfate
« Reply #27 on: March 28, 2018, 02:27:36 am »
You could consider using Antioxin SB or its equivalent after fermentation: add 2-4 grams per 100 liter of 50% metabisulfite and 50% ascorbic acid.

It's interesting to note that the same company that produces Antioxin SB (AEB Group) also produces Antioxin SBT, which contains 10% gallotannins, and is used in the mash. So implicitly they are recommending against using gallotannins after fermentation.
Frank P.

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Offline Robert

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Re: Potassium metabisulfate
« Reply #28 on: March 28, 2018, 05:44:11 am »
My interest in K-meta along with finings is simply to counter any DO added in fining, not really as a preservative per se or correction for any upstream effects.  Maybe the water that the finings are dissolved in is an insignificant source of DO and if introduced with a CO2 purge I shouldn't worry?
Rob Stein
Akron, Ohio

I'd rather have questions I can't answer than answers I can't question.

Offline ynotbrusum

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Re: Potassium metabisulfate
« Reply #29 on: March 28, 2018, 06:16:07 am »
You could preboil and chill the water for the finings but any opening of the system would expose the beer to some oxygen, so perhaps a way through the in post with CO2 pressure could be used?
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