Wet treatment of Ugandan Coffee

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Wet treatment:

1. Cherry separation:

Harvested cherries usually include immature, immature cherries, dried cherries, twigs and leaves. They are lighter than ripe cherries, so they can be removed by flotation, which can be carried out in a simple vat or mechanically in the separator of the washing machine, which can float away unwanted impurities and wash ripe cherries.

two。 Pulping:

The washed cherries are ground into pulp, and in the process, the wet beans are squeezed out of the cherry pulp. Pulping can be done with a manual pulping machine with 300 kilograms of fresh cherries per hour. Capacity can be increased by installing electric motors or diesel / gasoline engines. Larger equipment can be used in the central pulping station, up to a maximum of 4.0 tons per hour. Wet sheepskin paper beans are surrounded by a layer of mucus, which is removed by fermentation controlled by biochemical enzyme activity to make "completely washed" coffee.

If the mucus is removed mechanically, the resulting coffee is called semi-washed coffee.

3. Cleaning:

After the mucus is degraded, it is washed in a sink or vat filled with water. Parchment coffee is slightly denser than water, and the beans sink to the bottom of the jar. Therefore, coffee beans must be continuously stirred using a rotating stirring rod or manually using a spade in the cleaning channel.

In the mechanical mucus removal agent, mucus degradation and cleaning only need one operation.

4. Dry:

Wet parchment without mucus, with a moisture content of 50%-60%, and then dried to 12% on a suitable elevated drying table to ensure its preservation. Mechanical drying to speed up the drying system can be used to drain some water.