Can I forgo sorbate if a 0.5 micron filter is used for back sweetening?

Discussion in 'General Wine Making Forum' started by crabjoe, Nov 17, 2019.

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  1. Nov 17, 2019 #1

    crabjoe

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    I'd like to use ZERO sorbate if it's economical.

    From my understanding a 1 micron filter absolute rated filter will remove yeast. So it got me thinking that a 0.5 micron filter would be the way to go to not having to use sorbate. And even if sorbate was being used, since there would be little to no yeast after filtration, maybe I could go with 1/5 the amount of sorbate.. say 1/2tsp for a 5 gallon batch that had been pushed through a 0.5 micron nominal filter.

    Thanks!
     
  2. Nov 17, 2019 #2

    Johnd

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    I did a sweetened strawberry wine with a .5 micron filter and no sorbate with no issues at all.
     
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  3. Nov 17, 2019 #3

    NorCal

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    I did a Rhone blend (GSM) which had a stuck Grenache in it. I think the final blended residual sugar number was .6 brix. I kept the blend in the carboys for 4 months to make sure it was stable, which it was and stayed that way. No sorbate or filtering. Not saying that is what I’d recommend doing, but I was willing to take a chance with 6 cases.

    Your plan sounds like a good one.
     
    Last edited: Nov 17, 2019
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  4. Nov 18, 2019 #4

    crabjoe

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    Was this with a absolute or nominal filter?
     
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  5. Nov 18, 2019 #5

    Johnd

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    Buon Vino super jet plate filter, so not absolute, but plenty fine enough to remove yeast.
     
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  6. Nov 20, 2019 #6

    jgmillr1

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    Yeast range from 1-3microns so an absolute 0.5 micron membrane filter would theoretically prevent any yeast from getting into your wine.

    The commercial standard filter is a membrane 0.45micron size done at bottling. Even then sorbate is frequently used because all it takes is one viable yeast cell.

    However this assumes you have bubble tested the filter to ensure its integrity. And the sterile filtered wine is only as sterile as the container and equipment you use to filter it into.

    Key word "nominal" rather than absolute.
     
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