NOVELTY - Assembly comprises: a heating assembly comprising burner (22), heat exchanger, and combustion chamber (24); a drying assembly comprising dryer frame (42), generally cylindrical dryer drum (48), means for rotating dryer drum with respect to dryer frame, and means for conveying thermal fluid from heat exchanger of the heating assembly through thermal fluid tubes in dryer drum; a cooling assembly; means for conveying material from the discharge outlet of dryer drum to the inlet of cooling drum; and a steam duct (80) for conveying steam from the upper end of the dryer drum to combustion chamber.    USE - The assembly is useful for processing biomass material for pelletizing into a pellet (claimed).    ADVANTAGE - The assembly provides torrefied fuel pellets from the biomass material without the addition of a binder additive, where the torrefied fuel pellets have heating values similar to those of coal, as well as high grindability, structural stability and moisture resistant.    DETAILED DESCRIPTION - Assembly comprises: a heating assembly comprising a burner (22), a heat exchanger having many heat transfer coils in it, and a combustion chamber (24) that is operatively connected between the burner and the heat exchanger so that the burner may be operated to heat a thermal fluid in the heat transfer coils at 200-550 degrees F; a drying assembly comprising a dryer frame (42) having an upper end and a lower end, a generally cylindrical dryer drum (48) that is mounted on the dryer frame for rotation about the axis of the dryer drum, where the dryer drum has an upper end having an inlet, a lower end having a discharge outlet, and many thermal fluid tubes extending along the interior of it, means for rotating the dryer drum with respect to the dryer frame, and means for conveying the thermal fluid from the heat exchanger of the heating assembly through the thermal fluid tubes in the dryer drum; a cooling assembly comprising a cooler frame, a generally cylindrical cooling drum that is mounted on the cooler frame for rotation about the axis of the cooling drum, where the cooling drum has an inlet end with an inlet, an outlet end with a discharge outlet, a cooling tube extending along the interior of it, a nozzle mounted on the end of the cooling tube within the cooling drum, and many flights mounted on the interior of the cooling drum and arranged to direct material from the inlet end to the outlet end as the cooling drum is rotated, means for rotating the cooling drum with respect to the cooler frame, and means for conveying cooling fluid through the cooling tube to be discharged through the nozzle; means for conveying material from the discharge outlet of the dryer drum to the inlet of the cooling drum; and a steam duct (80) for conveying steam from the upper end of the dryer drum to the combustion chamber. An INDEPENDENT CLAIM is also included for making a fuel pellet from biomass, comprising: providing the heating assembly, drying assembly, cooling assembly, and steam duct; providing a volatile organic compound (VOC) duct for conveying VOC from the lower end of the dryer drum to the combustion chamber; providing a pellet press for compressing white biomass or torrefied biomass; introducing green biomass into the inlet at the upper end of the dryer drum; operating the burner to heat thermal fluid in the heat exchanger at 200 degrees F, if it is desired to produce white biomass, or operating the burner to heat thermal fluid in the heat exchanger at 475-550 degrees F, if it is desired to produce torrefied biomass; conveying heated thermal fluid from the heat exchanger through the thermal fluid tubes in the drum dryer; rotating the drum dryer to convey the green biomass introduced into the inlet of it to the discharge outlet of the dryer drum as it is heated at 200 degrees F so as to convert the green biomass into white biomass, or rotating the dryer drum to convey the green biomass introduced into the inlet of it to the discharge outlet of the dryer drum as it is heated at 475 degrees F, so as to convert the green biomass into torrefied biomass; conveying the white biomass or torrefied biomass from the discharge outlet of the dryer drum to the inlet of the cooling drum; conveying cooling fluid through the cooling tube of the cooling drum so that it is discharged through the nozzle of the cooling drum onto the white biomass or torrefied biomass in it; rotating the cooling drum to convey the white biomass or torrefied biomass introduced into the inlet of it to the discharge outlet of the cooling drum as it is cooled at 150 degrees F; conveying the white biomass or the torrefied biomass to the pellet press; and operating the pellet press to compress the white biomass or the torrefied biomass to produce fuel pellets.    DESCRIPTION OF DRAWING(S) - The figure shows a perspective view of the drying and cooling assembly and a portion of the heating assembly of the plant.    Burner (22)    Combustion chamber (24)    Dry frame (42)    Cylindrical dry drum (48)    Steam duct (80)