Maguin-Interis processes of stillage (spent wash) treatment are suited to the various raw materials. Their design allows energy costs to be reduced and fouling to be controlled, while ensuring optimal product quality. Stillage (Spent wash) obtained from starchy raw materials is clarified before concentration by centrifuge-decanter, in order to eliminate cellulosic fibres.

Clarified stillage is recycled at the Liquefaction stage in order to minimize dilution water consumption and to reduce the evaporation necessary for concentration.

Clarified stillage is concentrated using a multiple effect scheme, or mechanical recompression or thermo-compression of vapours. These can be coupled with other upstream or downstream process units in order to save energy for he whole plant.

Working temperatures of evaporators are chosen to minimize fouling and preserve protein quality in the final syrup.