Mucilage Remover

Operation of the Mucilage Remover

  1. 1.The sole function of the Mucilage Remover is to wash the mucilage from the coffee’s external parchment.

    1. a.Mucilage is a fruity layer on the outside of the coffee parchment that naturally begins to ferment, after the coffee is harvested from the tree.

    2. b.For most coffee processing methods, the mucilage is removed from the parchment, before the coffee is dried.

    3. c.Mucilage naturally dissolves in water.

  1. 2.The Mucilage Remover uses water, and friction created from its spray, to wash the mucilage from the coffee parchment.

  1. 3. The mucilage remover is composed of three parts, an internal perforated cylinder, a rotor, and three water hoses.

    1. a.The internal cylinder is vertical, and perforated.

      1. i.Throughout the washing process, as coffees travel up the cylinder, perforations allow water and mucilage to filter down and out of the machine, while containing the coffee parchment inside the cylinder. 

    2. b.The parchment coffee is streamed up and through the machine by a rotor at the base.

      1. i.Coffees enter the mucilage remover at the base, from a tube connected to the rotary screen.

      2. ii.The opening at the base of the mucilage remover positions coffees directly onto the rotor, which as it turns, projects the coffee up and through the entire machine, bringing it into contact with the water being sprayed from hoses, positioned throughout the machine.

    3. c.Three water hoses, connect to the top, middle, and base of a tube within the cylinder, channeling water to metal pipes extending the entire height of the cylinder.

      1. i.As coffees travel up the perforated cylinder, water is sprayed at a high intensity, causing friction as the coffees press against the outer, perforated wall.

      2. ii.This action slowly washed the parchment of its mucilage.


  1. 4. As the parchment coffees reach the top of the machine, they are emptied into hoppers positioned directly in front of the mucilage remover.

    1. a.From these hoppers, they are drained of any excess water, before being spread out onto the patios for drying.