Using dry biomass to produce energy for dryers has significant advantages as the handling, transportation and pyrolysis
process reduces the cost. Three main choices for drying biomass are rotary dryers, flash dryers and fluidised bed dryers. The
drying medium can be pure hot air, hot air with steam, and pure superheated steam. From this study, it is evident that
increasing temperature will decrease drying time and increase throughput but not necessarily decrease the drying cost due to
higher energy use and part of capital inputs such as loading/unloading and heat plant. Thus low drying temperature can be
used if throughput is not a key issue for an operation. The total global warming potential of biomass drying process as
expressed in CO2 equivalent units is 9.3 kg/t of oven-dry biomass using dry wood waste as fuel for a rotary drum dryer. If
this dry wood is used for a power station, there is a significant reduction potential of CO2 emission compared with that from