What is the Anaerobic Washed Process?

The Anaerobic Washed process represents the perfect marriage of cutting-edge fermentation science and traditional wet-mill precision. It is an advanced processing method engineered for roasters and coffee lovers who demand explosive, unconventional flavor profiles but refuse to sacrifice the immaculate cleanliness of a classic washed coffee.

The process begins immediately after harvest. Perfectly ripe, hand-picked cherries are placed inside food-grade, oxygen-depleted airtight tanks. By sealing the containers and forcing an oxygen-free (anaerobic) environment, producers alter the microbial ecosystem. This setup allows unique anaerobic yeast and bacteria strains to ferment the fruit sugars at a highly controlled, slowed pace, unlocking complex organic acids and aromatic compounds that are completely impossible to achieve through standard open-air processing.

What to Expect in Your Cup?

Brewing an Anaerobic Washed coffee gives you a sensational, best-of-both-worlds experience. Because of the pressurized anaerobic stage, the cup bursts with an intense flavor profile, showcasing complex aromatics and vibrant, unexpected fruit notes—such as bright tropical fruits, cooked berries, or exotic florals. However, because the coffee is de-pulped and thoroughly washed with clean water immediately after fermentation, the final cup cuts through any heavy, funky, or boozy overtones. The result is a masterfully balanced cup that offers high flavor intensity alongside a sparkling, vibrant acidity and exceptional clarity.

Challenges at the Farm?

Managing an Anaerobic Washed micro-lot is a game of millimeters for coffee producers. It requires specialized airtight equipment, gas release valves, and constant, meticulous tracking of pH levels and internal tank temperatures. If the fermentation is left even a few hours too long, the batch can over-ferment, creating sour, unstable defects. Furthermore, the final washing phase requires an abundance of clean water and immediate, flawless drying to halt the microbial activity instantly. It is a highly technical, stressful process that demands absolute precision from the farm's wet mill team.