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  • 1.  Parts storage & sanitation

    Posted 05-16-2023 11:13

    We have, as a matter of practice, stored all of our clamps, gaskets, and small stainless parts (elbows, extensions, etc.) in an iodophor based solution, in buckets, over the years at the direction of the previous brewmaster.   It was my understanding that the reasoning behind this decision was based on cost (as Iodophor sanitizers were inexpensive at the time) and the visual cues that point to its efficacy (iodophor solutions loose color as their effectiveness wanes).  Recently, however, costs of these Iodophor solutions has skyrocketed (doubling in cost).   This combined with an excellent presentation by Dirk Loeffler at one of our recent District Meetings (Great Plains) that touched on the corrosive nature of off-gassing iodophor on stainless steel has caused me to re-think this practice.   

    Many questions come from this:
    What would be a suitable and inexpensive alternative to iodophor?  PAA seems like the most likely choice, but it is slightly unpleasant to deal with and highly corrosive and harmful at high concentrations.  Quaternary Ammonium has been suggested as another alternative but I don't like the potential build up of residual films on the parts and gaskets that could result in deleterious effects, namely flavor carry-over and foam degradation.  Is there another alternative?  Do we completely scrap the practice of storing parts in sanitizer and instead move towards storing parts dry, then sanitizing these parts as needed in an appropriate sanitizer for the proscribed contact time?  What is everyone doing out there?  And what is the MBAA's recommended best practice in parts handling?



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    Geoff Deman
    Head Brewer/Director of Brewing Operations
    Free State Brewing Co
    Lawrence KS
    (785) 843-4555
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  • 2.  RE: Parts storage & sanitation

    Posted 05-17-2023 13:06

    We store our parts dry on racks in our cellar. After parts are used they are rinsed, cleaned in hot caustic, rinsed, then set in sanitizer before being placed on the racks. Prior to use the process is repeated (rinse, caustic, rinse, sani). We also use this same procedure whenever any part, hose, valve etc. is connected to anything else.  We don't see issues with this process. 



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    Greg Winter
    Quality Assurance Manager
    Flying Dog Brewery
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  • 3.  RE: Parts storage & sanitation

    Posted 05-17-2023 13:39
    Greetings,
     
    In our nearly four years of commercial operation, we have always stored parts clean and dry, then sanitized with the recommended dilution/contact time of PAA. Yes, at full strength it will cause skin irritation, but properly diluted has caused us no issues. And (knock on wood) we have never had any type of infection in a batch.
     
    Cheers,
     
    Shane Shoemaker, President
    BS Brew Works Inc.
    1010 S Main St.
    Springfield, TN 37172
    (615) 932-2422





  • 4.  RE: Parts storage & sanitation

    Posted 05-17-2023 13:41

    Hi Geoff,

    We were using iodophor for many years, but started using PAA after running some plates in our lab comparing efficacy of iodophor to PAA and Isopropyl.  We ripped off this experiment from Bells.  We confirmed that cultures of yeast still had lots of viable colonies after 10+ minutes in Iodophor, whereas PAA was zero viability within a minute or two.  Yes the downside is that handling is more challenging and you don't have a good visual cue of concentration.  However, based on our plating results, the visual aid for Iodophor didn't mean a lot if it wasn't actually sanitizing the equipment very effectively...

    We store parts dry but make up buckets of PAA at 100-200ppm (titrated) concentration daily to store parts that will be in use for the day.

    I would not use Quat for this, it needs to be rinsed very well before touching any product.



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    Robert Fulwiler
    Technical Director
    Fremont Brewing Co
    Seattle WA
    (206) 484-2690
    robert@fremontbrewing.com
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