Vacuum boil drying and vacuum boil extraction – new approaches for material and energy utilization of biomass -

This paper presents two innovative procedures for implementation in the field of waste treatment for drying and extraction of waste using a vacuum.

The procedures are referred to as vacuum boil drying and vacuum boil extraction. Vacuum boil drying is a procedure for the careful drying of various goods with low energy use. However, it has not yet been used to dry treated waste. Vacuum boil drying utilizes a vacuum/subpressure applied to the drying container to reduce the evaporation temperature of water. Caking and sticking of residue is avoided. In addition the drying period is shorter than that of biological drying procedures. This is a so-called „coat drying“, where heat is applied externally to dry the material. This allows the heat from a cogeneration plant to be utilized.



Copyright: © European Compost Network ECN e.V.
Quelle: ORBIT 2003 (Mai 2003)
Seiten: 2
Preis: € 1,00
Autor: Prof. Dr.-Ing. Klaus Fricke
Dipl.-Ing. Christian Widmer
 
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