Abstract: There is provided a system for treating a combination of a liquid and granular matter, which granular matter is larger than or equal to a minimum grain size and comprises two or more types of granular matter with different densities, wherein at least two of the different types of granular matter have densities being larger than the density of the liquid. The system comprises a stratification machine with a stratification or sorting chamber for holding the combination of liquid and granular matter, which stratification or sorting chamber has one or more side walls. The stratification machine also holds a movable plate arranged within the stratification or sorting chamber, where the moveable plate has sieve openings smaller than the minimum grain size of the granular matter to be treated to thereby maintain the granular matter above or on top of the movable plate.

Abstract: There is provided a system for treating a combination of a liquid and granular matter, which granular matter is larger than or equal to a minimum grain size and comprises two or more types of granular matter with different densities, wherein at least two of the different types of granular matter have densities being larger than the density of the liquid. The system comprises a stratification machine with a stratification or sorting chamber for holding the combination of liquid and granular matter, which stratification or sorting chamber has one or more side walls. The stratification machine also holds a movable plate arranged within the stratification or sorting chamber, where the moveable plate has sieve openings smaller than the minimum grain size of the granular matter to be treated to thereby maintain the granular matter above or on top of the movable plate.