- Wet Mill
The wet mill goes by many names (Beneficio, Factory, Washing Station, Receiving Station) and can serve several different functions. Wet mill, as the name implies, involves water to process and transport coffee, but new ecological wet mills might use very little. But in nearly all cases, it is the place where whole coffee cherry fruit is brought for the first stages of it's transformation to dried green, exportable coffee. In traditional wet-processing, the wet mill is where the coffee is pulped (the outer fruit skin removed), floated in water (to remove defective beans), fermented (to break down the fruit mucilage layer), washed (to remove the fruit) and dried on a patio, a screen (raised bed), or a mechanical dryer. At this point green coffee seed is inside an outer parchment shell.