The washing is carried out in a washing module equipment with a temperature-regulated tank where the sample is washed by friction under the effect of a rotating agitator and a set of fixed blades.
Then, the tank is unloaded onto a vibrating screen to collect as much water as possible that can be reused for a new wash. To finish, the washed wastes are conveyed by an endless screw to a dryer before being evacuated by a cyclone.