Treatment of nutty coffee and red wine-how many treatments are there for coffee

Sasa described in the competition: select Rume Sudan from Las Nubes, Colombia, put the coffee fruit in a sealed metal container for anaerobic fermentation, and purposefully control the pH value of the fermentation process, the type and number of bacteria involved in the fermentation and other variables. The processor injects carbon dioxide into the container to prevent oxidation from producing volatile acid, a process known as lactic acid fermentation. In the process, malic acid and lithic acid are formed, and the lithic acid is relatively stable, so the coffee beans fermented by lactic acid have more mellow acidity and have cheese, nutty and creamy flavor.

In addition, some containers are similar to red wine fermentation plugs or one-way exhaust valve devices through which carbon dioxide can be discharged to control the air concentration in the container. At this point, the coffee fruit in the container is fermented with acetic acid, and the bean flavor is relatively bright and clean, with citric acid flavor.

1.2 washing method

Water washing is the most popular treatment method at present, and most boutique coffee beans will choose water washing method. Washing coffee refining process: harvesting → storage tank (removal of impurities and immature beans) → pulp removal machine (removal of pulp and impurities) → fermentation tank (removal of mucous membrane on endocarp) → washing pool (selection of light and hard beans) → sun drying field (or dryer) → sheller (removal of endocarp) → grading (electronic bean selector or hand selection, → outlet semi-washing method is also known as "honey treatment", which is a compromise between drying method and water washing method. The process of fermenting the coffee fruit by washing is omitted. Harvest → storage tank (remove impurities and impurities) → pulp removal machine (remove pulp and impurities) → washing pool (select light and hard beans) → sun field (or dryer) → sheller (removal of endocarp) → classification (electronic bean selector or hand selection, sieve, etc.) the quality of → export honey treatment is stable but not as good as water washing treatment. This method of processing coffee beans by honey treatment has recently been sought after by coffee lovers. It has a sweet taste and is rich in Crema. It is suitable for extracting Espresso from the base of Italian coffee. The advantage is that it can restore the flavor of coffee beans, the coffee is more sweet, and the taste of red wine is outstanding. The disadvantage is that coffee beans are very vulnerable to contamination and mildew during the drying process after the exocarp of coffee berries are removed.

Acetic acid fermentation: cleaner, more lively acid, brighter acid, citric acid

Lactic acid fermentation: taste more round, less cleanliness than acetic acid fermentation, higher alcohol thickness, malic acid / tartaric acid

Prior to this, the treatment plants used manual operations handed down from generation to generation, such as biting to feel the degree of fermentation of coffee beans. This kind of fermentation is uncontrollable and changeable.

The fermentation method can be controlled to monitor the fermentation degree by controlling the PH value. In order to achieve predictable results, and each batch of consistent special manual picking team is trained and picked strictly in accordance with the picking requirements of boutique coffee beans: immature fruits < 2%, defective beans < 3%, floating beans < 5%.

Acetic acid fermentation-aerobic fermentation

Lactic acid fermentation-anaerobic fermentation

The expectation of taste