NOVELTY - An apparatus for producing ethanol from organic material, comprises a fermentation vessel (10) containing a fermentation mixture (13) that comprises a microorganism (14) that reduces ferric ion and produces at least one volatile organic acid from organic substrates; a device (11) for producing synthesis gas containing carbon monoxide and hydrogen from biogas containing methane; and a catalyst (12) for converting synthesis gas to an alcohol mixture containing greater than 2C alcohols. The device comprises a steam reformer and/or a partial oxidation unit.    USE - For producing ethanol from organic material, such as biological wastes (e.g. manure, sewage and crop wastes) and other organic materials.    ADVANTAGE - The inclusion of the microorganism that reduces ferric iron (Fe3+) to ferrous iron (Fe2+) in the fermentation mixture, enhances the efficiency of the fermentation and the yield of alcohol. The iron-reducing microorganism increases the yield of methane and carbon dioxide (CO2). By improving the yield of methane, inclusion of the iron-reducing microorganism also improves the yield of alcohol in the overall process. The iron-reducing microorganism can remove odor-causing compounds, as the microorganism converts relatively insoluble Fe3+ to the more soluble Fe3+ which binds sulfhydryl groups and precipitates compounds containing sulfhydryls, which are the bulk of odor-causing compounds.    DETAILED DESCRIPTION - An apparatus for producing ethanol from organic material, comprises a fermentation vessel (10) containing a fermentation mixture (13) that comprises a microorganism (14) that reduces ferric ion (Fe3+) and produces at least one volatile organic acid from organic substrates; a device (11) for producing synthesis gas containing carbon monoxide (CO) and hydrogen (H2) from biogas containing methane (CH4); and a catalyst (12) for converting synthesis gas to an alcohol mixture containing greater than 2C alcohols. The device comprises a steam reformer and/or a partial oxidation unit. The microorganism is derived from bacteria (ATCC 55339). The fermentation mixture further comprises an iron source. The apparatus further comprises a purification unit functionally coupled to catalyst; and a recirculation unit functionally coupled to catalyst and purification unit to recirculate at least a portion of the methanol-rich fraction to catalyst for reaction with synthesis gas. The purification unit comprises a condenser to preferentially condense at least one greater than 2C alcohol from the alcohol mixture, generating greater than 2C rich alcohol fraction and a methanol-rich fraction.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic diagram of an apparatus for producing alcohol from organic material.    Fermentation vessel (10)    Device (11)    Catalyst (12)    Fermentation mixture (13)    Microorganism. (14)