The most
common dryers of biomass applied in bioenergy plants are convection
dryers but the use of steam drying technology is increasing
(Fagern€as et al., 2010). The advantages and drawbacks of the
different drying technologies are evaluated based on some parameters
such as dryingway, temperature and exposure time (Ståhl
et al., 2004).Regarding the pelleting facilities, one of the main
conclusions obtained is that the drying is a very costly process due
the energy consumption and the cost of machinery that means
around the 30% of the total cost of the facilities (Uasuf and Becker,
2011).