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Thread: caustic soda mixture strength

  1. #1
    Join Date
    Sep 2015
    Location
    Salt spring island bc Canada
    Posts
    31

    caustic soda mixture strength

    Hi all,

    I've got a bag of micropearl caustic soda, and I'm not sure how much I need to add to how much water in order to get a strength that's good for washing kegs. Can anyone advise?

    Thanks!

    Mike

  2. #2
    Join Date
    May 2012
    Location
    Livermore, CA
    Posts
    565
    Generally pure NaOH is not used, its a built product with chelating and surfactant products added. 1000ppm is something that I have seen for cleaning though. That would be 3.5ml 50% NaOH Soln/gallon H2O. Its advisable to go to the manufacturer, they will be able to tell you anything you need to know on how to use it.

  3. #3
    Join Date
    Oct 2002
    Location
    Chesterfield, UK
    Posts
    1,709
    Do NOT use pure caustic soda. You must always use formulated detergents, which will include agents etc. - even if you use acid detergent as a secondary detergent wash.

    I worked at one brewery where they had been doing just that (unformulated caustic only) for I don't know how long, and had to spend two complete 8 hour shifts simply getting rid of the beer stone that had built up in a single conditioning tank and the associated CIP set. Oddly, the other 7 CTs cleaned by this CIP set had virtually no stone / scale - but all of them suffered from poor micro. This was in an area with virtually demineralised water being used for brewing (albeit with salts additions in the brewhouse)
    dick

  4. #4
    Join Date
    Sep 2015
    Location
    Salt spring island bc Canada
    Posts
    31
    Thanks guys,

    I’ve now found a chemical supplier with a blend designed for cip and keg cleaning...too much confusion with this dry stuff, and as you have both said, it’s not the right thing anyway.

    Cheers,
    Mike

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