A low temperature biomass drying system was installed at the Uniforet pulp and paper mill in Quebec to dry sludge produced during the papermaking process into a high efficiency biofuel.
Prior to the adding the Dry-Ex system from Thermal Energy
International, Ottawa, the mill was spending millions of dollars to treat and dispose
of the sludge as landfill waste.
The system processes 200 wet tons of sludge a day containing
22 percent solids (78 percent moisture), evaporating 5 tons/hr of liquid from
the sludge at low temperature. The output was 40 dry tons of biomass dried
containing greater than 60 percent solids, which was used as biofuel in a
to Thermal Energy, the mill eliminated costly sludge treatment and landfill
expenses. It also developed an economical source of bioenergy with reduced
emissions. Finally, the papermaker was able to realize a bottom line multi-million
dollar swing from waste cost to reduced fossil fuel consumption and energy
Mill Dries Sludge into Biofuel
October 14, 2010