People reuse barrels for wine and beer all the time. Probably easier to clean out liquid than solids though. You would probably need a larger opening.
An alternative would be to just add charred wood to your jars.
my only reservation in adding wood to the brine is how it may impact the both the pH and the overall biome over time. it's just something I'd need to research further to include trying a control soak this year. I do however smoke peppers over (so far just cherry wood) and then complete the dehydration for making pepper 'dust' to add to other things for a sweeter, smoky heat.
Yeah I was surprised that beer and wine were both mild acids.
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