Anaerobic Fermentation

A fermentation step carried out in a sealed or low-oxygen environment.

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What happened after picking

What it means

A fermentation step carried out in a sealed or low-oxygen environment. It has become a popular shorthand in specialty coffee, but the label names only one part of the process and tells you very little unless you also know duration, temperature, and what happened before and after it.

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Where this leads

Each one pushes this into the cup, compares it, or helps you act on it.

The fruit behind the bean

Coffee Cherry

Start with the fruit because processing begins the moment the cherry is picked.

Remember the cherry when reading tasting notes. Fruit-forward coffees make more sense once you remember coffee began as fruit.

What happened after picking

Ripeness

Processing quality starts before fermentation with how ripe the fruit was.

Poor ripeness sorting creates defects that no clever roast or brew recipe can fully hide.

What happened after picking

Washed Process

Then compare one of the cleanest process styles.

When someone says a coffee tastes clean and structured, washed processing is often part of the explanation.

What happened after picking

Natural Process

And contrast it with a process that leaves the fruit involved much longer.

Natural process can mean sweetness and intensity, but it also raises the cost of sloppy drying.