How is coffee fermented ?

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The pulped coffee beans are put into cement tanks with water and are allowed to ferment for 16-36 hours. The fermentation time depends on a number of factors including the amount of coffee fermenting, water temperature, and humidity. The best way of determining the end of coffee fermentation is to feel the coffee beans to determine if they are still encased in mucilage. If the coffee beans are fermented for 36-72 hours, stinker beans develop. Lactic, acetic, and propionic acids are produced in this process.

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