2. Air displacement dehydration

Blowing compressed gas into the filter cake is a dewatering method that is used as soon as the medium is sufficiently permeable (permeability of 10 ^-10 to 10 ^-15 m ² ), as the operation takes place on the filter itself, which reduces investment. To predict performance, we need to determine :

• the saturation equilibrium reached at the end of the operation;

• the flow of gas consumed ;

• prediction of moisture profiles in the cake.

More or less sophisticated models have been proposed in the literature to answer these questions [9][10]