NOVELTY - Biofuel processing system (I) comprises: a biomass conversion system (12) that is operable to create one of an alcohol stream and a methane stream from a biomass using a biological process; a reactor operable to e.g. receive an undigested biomass from the biomass conversion system, generate heat from the undigested biomass; and a synthetic fuel creation system (16) operable to e.g. receive the one of an alcohol stream and a methane stream and the additional alcohol stream and a methane stream from the reactor and receive another portion of the heat generated by the reactor.    USE - (I) is useful for the production of liquefied fuel from the biomass.    ADVANTAGE - (I) provides the biofuel with high energy density and compatible with commonly used fuels, such as gasoline or kerosene. (I) is operated at reduced cost, due to its integral fermentation and digester process, which avoids selective separation or filtering of biomass.    DETAILED DESCRIPTION - Biofuel processing system (I) comprises: a biomass conversion system (12) that is operable to create one of an alcohol stream and a methane stream from a biomass using a biological process; a reactor operable to receive an undigested biomass (comprising a portion of the biomass not used to create the alcohol and methane stream) from the biomass conversion system, generate heat from the undigested biomass, a portion of the heat transmitted to the biomass conversion system and create an additional one of an alcohol stream and a methane stream; and a synthetic fuel creation system (16) operable to receive the one of an alcohol stream and a methane stream from the biomass conversion system and the additional one of an alcohol stream and a methane stream from the reactor, receive another portion of the heat generated by the reactor and convert methane present in the alcohol and methane stream and the additional alcohol and methane stream into acetylene and hydrogen; hydrogenate the acetylene and the hydrogen to ethylene; and oligomerize the ethylene or alcohols present in the one of the alcohol and methane stream and the additional one of the alcohol and methane stream to liquefied fuel. An INDEPENDENT CLAIM is included for a method of preparing liquefied fuel comprising: creating one of an alcohol stream and a methane stream; generating heat using a gasification process that processes undigested biomass from the biological process, a portion of the heat used to create the one of an alcohol stream and a methane stream; and converting the one of an alcohol stream and a methane stream to liquefied fuel using another portion of the heat.    DESCRIPTION OF DRAWING(S) - The figure shows the biofuel processing system.    Biomass conversion system (12)    Gasifier and/or pyrolyzer (14)    Synthetic fuel creation system (16)    Biomass feed (18)    Hydrocarbons. (20)