Peat on Fermented Foods like Sauerkraut?

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You can get rid of lactic acid more easily:

Put yogurt in strainer (Hatrigo 1-Gallon Extra Fine Mesh Large Stainless Steel Strainer) (amazon).
Place a lid on the strainer and place it in the fridge.
Strain the yogurt for at least 8 hours, or up to 24 hours.
Put yogurt (now creamy) into glass bowl, pour liquid (whey and lactic acid) into sink.