NOVELTY - An organic material is fermented in a fermentation mixture to a biogas comprising methane and carbon dioxide, and a portion of the biogas is converted to synthesis gas comprising carbon monoxide and hydrogen. The synthesis gas is contacted with a catalyst (12a) to produce an alcohol product mixture, and the alcohol is purified from the alcohol product mixture, to obtain alcohol. The purified alcohol comprises methanol (5 weight% or less) and 2C or more alcohol (70 weight% or more).    USE - Manufacture of alcohol such as methanol and ethanol from biological waste such as manure, sewage and crop waste.    ADVANTAGE - The alcohol is manufactured economically.    DETAILED DESCRIPTION - An organic material is fermented in a fermentation mixture to a biogas comprising methane and carbon dioxide, and a portion of the biogas is converted to synthesis gas comprising carbon monoxide and hydrogen. The synthesis gas is contacted with a catalyst to produce an alcohol product mixture, and the alcohol is purified from the alcohol product mixture, to obtain alcohol. The purified alcohol comprises methanol (5 weight% or less) and 2C or more alcohol (70 weight% or more). The carbon dioxide (30 weight% or more) in the biogas is converted in the carbon dioxide reforming reaction, and methane (30 weight% or more) in the biogas is converted in the partial oxidation reaction or steam reforming reaction. The biomass is converted to synthetic gas by carrying out carbon dioxide reforming reaction of methane and carbon dioxide to two equivalent of carbon monoxide and hydrogen, and partial oxidation reaction of methane to carbon monoxide and two equivalent of hydrogen or steam reforming reaction of methane and water to carbon monoxide and three equivalent of hydrogen. INDEPENDENT CLAIMS are included for the following:    (1) Method of producing liquid fuel; and    (2) Apparatus for producing 2C or more alcohol.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic diagram of apparatus for manufacturing alcohol.    Fermentation vessel (10)    Device (11)    Catalyst (12a)    Steam reforming catalyst (15)    Carbon dioxide reforming catalyst (16)    Meter (25)