Ask The Brewmasters

This message was posted by a user wishing to remain anonymous

Good morning all, I am writing to ask your opinion on whether this kind of Tank soiling can be removed with CIP? (photos are attached) 

What product would you recommend? 

We have had good success removing this kind of staining using a hydrochloric acid-based product.  Here is a blog I wrote on how to do it with before and after pictures:

https://www.birkocorp.com/resources/blog/hot-liquor-tank-cleaning-using-birkos-ac-tec-100/

Hope this helps.

Dana

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Dana Johnson He/Him
Sector Specialist, Craft Brewing
Diversey - A Solenis Company
Henderson, CO
800.233.1000
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Hello,

   I think I replied in the wrong area before so not sure if you'll see it….

id run a caustic cycle with a hydrogen peroxide booster added.  If you don't have those in house hit up your current chemical provider and they can get you set up.  Be diligent with temps and concentrations and it should take it right off.

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Jason Brenden
Head Brewer/Director of Operations
Bridger Brewing
Bozeman MT
(218) 256-1132
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Looking at the pictures I am leaning towards biofilm deposits as well as a desperate cry for passivation, especially in the cold liquor tank.  I would recommend running a strong caustic with a peroxide additive first, followed by an inspection.  If the biofilm has been removed, you will likely still see some staining, which is rust from a lack of passivation.  This can be easily addressed with a strong Nitric Acid passivation cycle.

I would stay away from Hydrochloric Acid products, even when inhibited, since there is no need for this type of treatment here.  I have seen much worse than this and while it looks intimidating, it is actually relatively easy to address. 

You can e-mail me direct for Information about chemicals and exact procedures.

Cheers,     

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Dirk Loeffler
Executive Vice President
SEKA Chemicals
(404) 239-2700
loeffler.dirk@sekachemicals.com
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