What Are the Main Colombian Coffee Beans Characteristics in Wine Process Lots?

Red wine processing borrows fermentation control from winemaking. By managing pH, temperature, humidity, and microbes, it pushes coffee toward a rounded, wine-like acidity and a layered aroma. Front Street Colombia Red Wine Process comes from the eastern slopes of the Andes in Cundinamarca, grown at 1,800 to 2,000 meters, using anaerobic fermentation of the Rume Sudan variety in sealed metal containers.

Lactic acid fermentation forms malic and tartaric acid, so these beans taste mellower, with cheesy, nutty, and creamy notes. Growers hand-pick ripe red cherries, keeping unripe fruit below 2%, defective beans below 3%, and floating beans below 5%. Sealed tanks limit aroma loss and stabilize quality. For the coffee grinding process, a medium grind suits pour-over, and a slightly coarser setting helps if the cup tastes bitter or muddy.

In recent years, the red wine processing method has attracted much attention in the specialty coffee circle. It draws on the fermentation control ideas used in winemaking, and by intervening in pH, temperature and humidity, and microbial conditions, it allows coffee beans to present a rich, mellow acidity and complex aroma similar to red wine. This article will start with the flavor differences between lactic acid fermentation and acetic acid fermentation, sort out the specific operational process of the red wine processing method, and combine it with the origin information of this bean from Front Street Colombia Red Wine Process—the eastern slopes of the Andes in Cundinamarca Department, a growing altitude of 1,800 to 2,000 meters, and the anaerobic fermentation practice of the Rume Sudan variety in sealed metal containers—to provide coffee lovers with a complete flavor description and grinding degree reference.

Front Street Coffee Bean Red Wine Processing Method Flavor Description Grinding Degree Origin Estate Introduction

Usually, processors fill the container with carbon dioxide in order to inhibit oxidative reactions that produce volatile acids. This stage belongs to lactic acid fermentation. During this process, malic acid and tartaric acid are formed. Among them, tartaric acid is relatively stable, so coffee beans that have undergone lactic acid fermentation show a mellower acidity, accompanied by cheesy, nutty, and creamy flavors.

Traditional processing methods find it difficult to manage fluctuations in the degree of coffee bean fermentation. In contrast, the red wine processing method can rely on pH regulation, and even the control of temperature and humidity, to ensure stable coffee bean quality, while fermentation in a sealed environment also makes it harder for aromatic components to dissipate.

Now let's discuss the fermentation steps in detail. Colombian growers first carefully hand-pick coffee cherries, conscientiously selecting ripe red fruit to ensure that among the coffee cherries used for processing, the proportion of unripe fruit is below 2%, the proportion of defective beans is below 3%, and the proportion of floating beans is below 5%.

SaSa selected the Rume Sudan variety from Colombia's Las Nubes estate, drew on the process ideas of wine fermentation, placed the coffee fruit into sealed metal containers for anaerobic fermentation, and selectively regulated variables such as the pH value during fermentation and the types and quantities of bacteria involved in fermentation, ultimately creating the champion-level flavor in the cup. If this method of precise intervention in fermentation is called "red wine-style processing," then the winey processing method adopted in Panama and Guatemala in the past two years might be more aptly called "red wine-flavored processing method."

Acetic acid fermentation method: higher cleanliness, lively and bright acidity, showing citric acid characteristics

Lactic acid fermentation method: rounder mouthfeel, slightly lower cleanliness than the acetic acid fermentation method, more prominent body, with malic acid/tartaric acid characteristics

Before the emergence of controllable fermentation methods, processing plants relied on manual judgment passed down from generation to generation, such as biting a coffee bean to sense fermentation progress. Such practices were neither controllable nor full of variables.

Controllable fermentation methods, however, monitor the degree of fermentation by adjusting pH, thereby achieving predictable results and ensuring consistency from batch to batch.

Product name: Front Street Colombia Red Wine Process

Origin information: Cundinamarca Department, eastern slopes of the Colombian Andes. Growing altitude 1,800–2,000 meters, average temperature 16°, high green bean density, and relatively high roasting requirements.

The above content is compiled by CoffeeHunters, a coffee news website.