In the processing/drying section the water is evaporated from the raw material. The evaporated water turn into vapours. These vapours are handled in the vapour handling section.
The vapour stream still contains energy. If the energy can be utilized in the rendering plant, for example to make hot water for cleaning or other purposes, the installation can be extended with a Heat Exchanger. The heat exchanger is feasible from small batch to large continuous installations.