Maguin-Interis processes for vinasse (spent wash) concentration are suited to the various raw materials. Their conception allows the reduction of energy costs and control of fouling.

The use of co-current, counter-current or cross-current multiple effects enables the optimization of the concentration-temperature parameters and consequently minimizes fouling.

For low concentrations, the use of falling film evaporators independently combined with MVR (Mechanical Vapour Recompression), or coupled with multiple effects, allows operation with a low temperature difference and reduces investment.

For high concentrations and\or viscous products, multipass evaporators with forced circulation are used.

The proposed schemes are with multiple effects, combined with MVR or thermo-compression of vapours. These can be coupled with other upstream or downstream process units in order to optimize the overall energy consumption of the plant.

For materials with high potassium content (e.g. Beets), de-potassification of vinasse (spent wash) is realized by a Maguin-Interis concentration / crystallization process.