NOVELTY - Biomass torrefaction process involves adding biomass to a reactor, adding gas (G1) to reactor, in which the gas (G1) comprises 10-21 vol.% oxygen, controlling oxygen concentration of gas (G2), initiating heating of biomass, heating the biomass to biomass temperature by partial combustion of biomass with oxygen in the gas (G1) in reactor, maintaining the biomass temperature within reactor by spraying water into the reactor, so that biomass is torrefied to produce torrefied biomass and increasing the density of torrefied biomass to form densified biomass.    USE - Biomass torrefaction process used for forming biomass pellet (claimed) for energy production.    ADVANTAGE - The method enables efficient biomass torrefaction process and provides biomass having improved grindability, handling property, hydrophobicity, shelf life, energy density and homogeneity, and reduced moisture content.    DETAILED DESCRIPTION - Biomass torrefaction process involves adding biomass to a reactor, adding gas (G1) to reactor, in which the gas (G1) comprises 10-21 vol.% oxygen, controlling an oxygen concentration of gas (G2) exiting reactor, in which the oxygen concentration is less than 8 vol.%, initiating heating of biomass by increasing temperature of the reactor, heating the biomass to biomass temperature of 250-325 degrees C by partial combustion of biomass with oxygen in the gas (G1) in reactor, maintaining the biomass temperature within reactor for a predetermined time by spraying water into the reactor, so that a portion of moisture is removed from biomass, volatile organic compounds associated with biomass are removed, and biomass is torrefied to produce a torrefied biomass with a moisture content of 0-2 wt.%, and increasing the density of torrefied biomass at 90-200 degrees C to form densified biomass. An INDEPENDENT CLAIM is included for single-stage process for biomass torrefaction, which involves charging biomass to fluidized bed reactor, in which the biomass is chosen from wood, forestry waste, energy crops, municipal waste, plant material, straw and agricultural waste, charging fluidizing gas to fluidized bed reactor at velocity of 4-8 feet per second, combusting an amount of biomass in fluidized bed reactor, spraying liquid water into fluidized bed reactor to assist with control of temperature of fluidized bed reactor to 230-350 degrees C, maintaining oxygen content less than 15 vol.% in exiting gas leaving fluidized bed reactor, removing moisture from the biomass, in which the biomass is charged to fluidized bed reactor which has an average moisture content of 10-50%, and the fluidized bed reactor comprises fluidized bed with fluidized bed density of 20-50 pounds per cubic foot, so that torrefied biomass is produced, and increasing the density of torrefied biomass at 90-200 degrees C to form a densified biomass.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of fluid bed reactor.    Integrated fluid bed reactor (6)    Perforated plate (34)    Off-gases (46)