Coffee cherry consists of skin, pulp, mucilage, parchment, silverskin
and coffee bean. Skin, also called pericarp, turns red in
ripeness. Below the skin there is the yellowish, fibrous and sweet
pulp, the outer mesocarp. This covers a thin layer of mucilage,
the so called pectin layer. The next component is the parchment
or endocarp, which is followed by the silverskin. In the centre of
the fruit there is the coffee bean, the endosperm of the fruit
(Esquivel & Jiménez, 2012). The coffee bean is used to produce
the actual coffee beverage. However, the processing of coffee
cherry into coffee beans is quite complex and generates a variety
of wastes. Ripened fruits are harvested and transformed by mainly
two ways of processing: wet or dry process. In the dry process the
coffee cherries are sun-dried, followed by a de-hulling step.