is anyone doing this in smaller scale operations (5-10k bbl/year)? The deaeration systems I'm looking at seem like overkill financially, but the residual filtered rinse water (and all it's dissolved O2) from our twist rinse that is still in the can prior to fill is bugging me.
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deaerated water in twist rinse?
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The rinse is to remove dust and any other debris, not to remove oxygen. So you are wasting money using deaerated water for rinsing. Solids free, sterile water (or at least potable quality), preferably with low levels of calcium salts to minimise scale build up in the rinse system is all that is requireddick
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Originally posted by dick murton View PostThe rinse is to remove dust and any other debris, not to remove oxygen. So you are wasting money using deaerated water for rinsing. Solids free, sterile water (or at least potable quality), preferably with low levels of calcium salts to minimise scale build up in the rinse system is all that is required
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You will use a heck of a lot of air - and energy to do this. All the, admittedly large, breweries I have worked at with twist rinsers don't have air jets. The small ones I have seen using such as Cask Brewing Systems also do not have air jets, but achieve decent results - or so they claim!!dick
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In the tests we've done, we haven't found measurable added DO levels (measurable within the noise of successive sampling) due to use of normal rinse water. It doesn't appear to be a factor.
As for vacuum evac, that is of course not possible in a can like it is in a bottle and is the reason that inline can fillers have lower (or the same) DO pickup levels as counter-pressure fillers, because you can't do evacuation, only flushing.
Josh Van Riper
Twin Monkeys
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None noted....
We use a very low dose of chlorine dioxide sanitizer to rinse with. Somewhere between what is used to treat municipal water and that used to sanitize tanks. No issues with the miniscule few drops of rinse water on taste. Check with your can manufacturer on what they might suggest avoiding. Some sanitizers may be incompatible with can liner or with the end sealant. Also be aware of your chemical compatibility with any label/sleeve that might be on your can.Phillip Kelm--Palau Brewing Company Manager--
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