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this post was submitted on 20 Oct 2024
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Science of Cooking
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We're focused on cooking and the science behind how it changes our food. Some chemistry, a little biology, whatever it takes to explore a critical aspect of everyday life.
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While I think that the lid can help a little by limiting air exchange, the purpose of these water barriers in fermentation is more to filter out larger objects and they don't hermetically seal. Exclusion of insects and airborne microbes help prevent undesired flavors. While they do create a slight bit of back-pressure, if the fermentation produces a significant amount of gas they need to let it pass through as stonewear cannot hold much pressure before it would break.
Some people have rigged up carbon filters on the output of various fermentation vessels, so if spouses or apartment neighbors would object to the aroma that approach may be worth investigating. Nobody should let smells stop them without attempting solutions!