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Steam recovery

Steam recovery Steam from continuous pressurized reactor can be recovered for use in other parts of the bio plant.

Conventionally steam is recovered by means of pressurized cyclones, but a more efficient way is to use a mechanical steam separator which gives a very clean steam, i.e., very low carry-over of biomass particles into the recovered steam. Mechanical steam separators are installed in many CTMP and fiberboard plants.

Solid-liquor separation Separation of the liquid from the biomass after hydrolysis is applied to extract the components, e.g. sugars or organic acids, that have been released from the biomass into the solution. The separation normally involves dilution or displacement with wash liquor (fresh water or recycled process liquid) followed by dewatering. The most commonly used equipment is screw presses or TwinRoll presses.