How Special Can Coffee Bean Special Processing Methods Be? Anaerobic Natural Coffee Processing Referencing Wine

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FrontStreet Coffee - Introduction to Anaerobic Natural Processing Method

Fermentation

After coffee cherries are harvested and before they are dried into coffee beans, there is a fermentation step. Through microbial decomposition and other organic reactions, the cherries develop special acidity, sweetness, and flavor. Traditional fermentation is aerobic fermentation, and due to uncontrollable natural conditions, the cherries are prone to over-fermentation.

Anaerobic fermentation refers to the process where coffee cherries decompose the sugars in the pectin at a slow, monitorable speed in a sealed, oxygen-free space. During this process, the alcohol produced by anaerobic fermentation can react with organic acids and convert into esters, developing more aromatic compounds and high-quality acidity, which gives coffee beans a wine-like richness.

The most well-known anaerobic fermentation method is the red wine processing method, also known as the carbon dioxide maceration method. Coffee cherries are placed whole in stainless steel fermentation tanks, and carbon dioxide is introduced while oxygen is expelled, creating a sealed, oxygen-free environment.

Characteristics of Anaerobic Fermentation Processing

• Using stainless steel containers (which don't absorb previous coffee bean flavors) to hold coffee cherries allows for cleaner flavor profiles.
• Fermentation in a sealed environment makes various factors easier to control, leading to more consistent coffee bean processing, and aromatic substances are less likely to volatilize.
• Fermentation in an oxygen-free environment results in rounder flavors, often bringing cheese and cream aromas.
• Coffee beans processed using this method typically have fuller body and wine-like aromas.

Flavor Characteristics

Anaerobic fermentation processing can achieve full aroma and clean taste. The processed coffee beans have full body, bright wine-like aroma, low acidity, and better sweetness.

Knowledge Point

Good coffee - high-quality green beans with defective beans removed, properly roasted, and correctly extracted when fresh.

In short: FrontStreet Coffee is a coffee research workshop, happy to share coffee knowledge with everyone. We share without reservation only to let more friends fall in love with coffee. Additionally, we hold three low-discount coffee events every month because FrontStreet Coffee wants to let more friends enjoy the best coffee at the lowest price. This has been FrontStreet Coffee's mission for the past six years!

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