Method and means of drying wet substances containing biomass

摘要

The method involves providing contact between gaseous mixture and moistened biomass-containing substances in the presence of direct current. The gaseous mixture is formed as drying gas (6) e.g. process exhaust gas and process residual gas, and the substances are formed as drying goods. The drying gas contains oxygen portion of maximum 20.5 volume per percentage, and acidic conditions are produced using the drying gas or components of the drying goods added to the drying gas. The drying gas is heated by process waste heat.