Coffee bean production process and common coffee processing methods

The technology of coffee beans mainly refers to two kinds:

1. The first kind refers to the processing technology of coffee from fresh fruit to raw coffee beans, that is, what we often call washing treatment, sun treatment and so on.

two。 The second refers to the treatment process from raw coffee beans to cooked beans.

The process from coffee fruit to coffee bean is called coffee treatment. There are more and more coffee bean treatment methods, but the common beans in front street coffee basically include all the current mainstream treatment methods. Beans with different treatment methods are also displayed in the store for guests' reference. Today, let's introduce Qianjie coffee from the four most basic coffee bean treatments, namely, sun drying, water washing, semi-washing and honey treatment.

The structure of coffee fruit, cherry-like coffee fruit, from the outside to the inside are peel, pulp, pectin layer, sheep skin (seed shell), silver skin, seed. The thickness of the pectin layer is about 1-2mm, which can be thought of as the translucent substance outside the tomato seeds, which is difficult to remove. The raw beans we usually buy are actually the innermost seeds and, perhaps, contain some residual silver skins.

All kinds of treatment methods, the purpose is the same, is to peel the beans. Based on the cost of economic considerations, including climate and other natural environmental conditions, so that the processing of beans may not be the same, but the process will affect the results!

The advantages of solarization

1. Simple, low processing cost.

two。 The raw bean is naturally dried in the pulp and absorbs the essence of the fruit, so the fruit is rich, sweet and mellow in thickness.

Shortcomings of solarization method

1. In some producing areas, the sun treatment did not screen out the floating beans, resulting in defects in the quality.

two。 During the drying process, the pulp is easy to mildew due to the return of moisture, which pollutes the raw beans.

3. The shelling of the machine inevitably hurts the raw beans, resulting in appearance defects.

Solarization:

Tanning is the oldest and most convenient way to treat raw beans.

First, screen the floating beans.

Pour the harvested coffee fruit into a large trough, and the ripe and full fruit will sink to the bottom of the water; the underdeveloped or overripe fruit will surface, and these floating beans need to be removed.

2. Sun drying

Next, the whole coffee fruit with meat belt is put on the bean drying farm to dry, and the water content is about 12%. It takes about two to four weeks, depending on the climate of the place of origin.

Third, shelling

The dried fruit will be naturally dried and the dried peel, pulp and sheepskin will be removed by a shelling machine, and the raw beans will appear.

Washing method:

Water washing is a common method of raw bean treatment at present.

First, screen the floating beans (the same sun method)

Second, remove the pulp

The fresh fruit is sent to the pulp screening machine (pulping machine) to remove the peel and pulp, and the immature fruit will be screened at this stage because it is not easy to separate the pulp. After the pulp screening machine, all that is left is pectin, sheepskin and seeds.

Third, ferment to remove pectin

Transfer the peeled seeds with pectin into the fermentation tank. Although the name is water [washing] method, in fact, it does not really wash away pectin, but through the fermentation process, pectin is removed by biodecomposition. The fermentation process is about 16-36 hours, during which the pectin must be stirred frequently to accelerate the separation of pectin from the seeds. Water washing fermentation produces acid substances such as citric acid, malic acid and acetic acid, which seep into raw beans, making the beans sour more sour than in the sun. After the fermentation is completed, it is really washed-- wash the beans again.

IV. Drying

After washing, you also need to be insolated or machine-dried to reduce the water content to 12%. Washing method because the flesh has been removed, so in the drying process, do not have to worry about easy mildew like the sun method. Dried sheepskin raw beans are not as hard as those with pulp and peel in the sun, and can be obtained by grinding and shelling with a hulling.

Coffee roasting process description:

1. Choose beans before roasting. Although beans have been selected many times in coffee producing areas, beans will need to be re-selected before and after roasting of Qianjie coffee.

2. Baking, using the baking machine according to the baking curve of the bean, baking with 190202 ℃ for 9-15 minutes

3. Choose beans after baking

4, packaging, and other coffee beans completely cooled down, packaging classification delivery.