Introduction:Colombian red wine processing is a specialty coffee processing method that incorporates winemaking fermentation techniques. By precisely controlling the fermentation process, it delivers a coffee experience that balances sweetness with elegant acidity. This article starts from the processing principles, provides a detailed analysis of the differences between its two fermentation pathways—acetic acid and lactic acid—and introduces in depth the quality characteristics of Colombian Red Wine Processed coffee from the Jiukui growing region. It also offers practical pour over parameters to help you more fully explore this uniquely flavored coffee bean.
The red wine processing method originated in Colombia and is an innovative coffee processing technique that integrates winemaking concepts. By simulating the fermentation environment of wine, this method applies meticulous control over the fermentation of coffee cherries, effectively enhancing the sweetness levels and acidity expression of the coffee while improving the overall cleanliness and delicacy of the flavors. This technique not only increases the coffee’s identifiability but also makes the processed beans more competitive in the market.
This processing technology is also known as controlled fermentation or, based on the dominant microbial groups, is divided into two main types: acetic acid fermentation and lactic acid fermentation. Acetic acid fermentation is an aerobic process, usually bringing out more pronounced acidity and a fresh citric acid tone, resulting in clean and vibrant flavors; whereas lactic acid fermentation occurs in an oxygen-deprived environment, producing tartaric and malic acids that make the taste more rounded and full-bodied. Though slightly lower in cleanliness, it significantly enhances the body.
Before the advent of the red wine processing method, many coffee farmers still relied on traditional experience—for instance, judging the fermentation stage by chewing coffee beans. This approach was not only difficult to quantify and stabilize, but also prone to causing inconsistent flavors across batches. The modernized red wine processing method instead uses scientific means to monitor the pH value during fermentation, ensuring that each step reaches the ideal state, thereby achieving stable and predictable flavor output.
The experimental team is led by Felipe Sardi from the United States, with members having backgrounds in biological sciences and ecology. They introduced green energy technologies such as solar power into the processing and trained a professional hand-picking team. These pickers strictly adhere to specialty coffee harvesting standards, keeping the unripe fruit ratio below 2%, defects under 3%, and floaters no more than 5%, ensuring that only the ripest coffee cherries enter the subsequent processing stages.
Taking Colombia’s Jiukui Estate as an example, this growing region is located on the eastern foothills of the Andes in Quindío Province, with planting altitudes ranging between 1800 and 2000 meters, and some sections even reaching 2100 meters. The average temperature here is about 16°C, with significant day-night temperature variations. Coupled with the high-altitude environment, the coffee beans grow slowly, have higher density, and place stricter demands on subsequent roasting transformations. The Jiukui Estate mainly grows the two classic varieties, Typica and Caturra, which, enhanced by the red wine processing method, showcase unique regional characteristics.
During the processing of this coffee, the pulp and flesh are first removed and impurities are cleared through washing. The coffee beans are then placed in a water-free fermentation tank for approximately 20.6 hours of fermentation, with the fermentation environment precisely controlled to guide the development of specific flavors. After fermentation, the beans are moved to a raised drying bed for 10 days of sun drying, further accumulating sweetness and complexity. This processing flow not only gives the coffee distinct berry and sugar-like flavors but also results in a cleaner and sweeter aftertaste.
For brewing, it is recommended to use red wine processed coffee beans with medium-light to medium roasts, which better highlight their sweetness and layered profiles. For pour over, the suggested water temperature is 90–95°C, paired with a grind size of 3 (referencing the Yangjia Xiaofeima grinder), and a powder-to-water ratio can be set at 1:16 (for example, 15 grams of coffee powder to 240 grams of water). This parameter is suitable for those seeking balanced flavors and clear layers, and can be fine-tuned according to personal taste preferences in terms of grind coarseness or water temperature.
In addition to pour over, this coffee is also well-suited for brewing with a siphon pot or French press, which can further emphasize its rich mouthfeel and mellow sweetness. Regardless of the brewing device chosen, it is recommended to perform a starch wash (bloom) before the actual brew and maintain a steady water flow with an even distribution of coffee grounds to fully bring out the unique berry sweetness and creamy texture endowed by the red wine processing method.
The above content is compiled by CoffeeHunters, a coffee news website.
