NOVELTY - A continuous, integrated pyrolysis and indirect fermentation process comprises subjecting aqueous solution solvent containing carbohydrate into homoacidogenic fermentation; esterifying organic acid; hydrogenating ester product to provide hydrogenation product; subjecting hydrogenation product to distillation; and recycling at least portion of higher boiling fraction; pyrolyzing biomass feed; subjecting at least portion of pyrolysis gases to hydrogen separation operation; and recycling fraction containing increased concentration of hydrogen and fraction containing carbon monoxide.    USE - Method for continuous, integrated pyrolysis and indirect fermentation process (claimed).    ADVANTAGE - The method enables high yield of product alcohol based upon fermentable feedstock; and achieves savings in compression costs for feed hydrogen, energy consumption and capital costs.    DETAILED DESCRIPTION - The continuous, integrated pyrolysis and indirect fermentation process comprises:    (A) subjecting aqueous solution solvent containing carbohydrate to homoacidogenic fermentation in presence of nutrients and acid-producing microorganism to obtain organic acid corresponding to alcohol;    (B) esterifying at least portion of organic acid with esterifying alcohol having greater number of carbon atoms than organic acid;    (C) hydrogenating ester product in presence of hydrogenation catalyst to provide hydrogenation product comprising product alcohol;    (D) subjecting hydrogenation product to distillation to provide lower boiling fraction comprising product alcohol and higher boiling fraction comprising unreacted ester product and esterifying alcohol;    (E) recycling at least portion of higher boiling fraction;    (F) pyrolyzing biomass feed to provide pyrolysis gases comprising hydrogen and carbon monoxide;    (G) subjecting at least portion of pyrolysis gases to hydrogen separation operation to provide fraction containing increased concentration of hydrogen and fraction containing hydrogen and increased concentration of carbon monoxide; and    (H) recycling fraction containing increased concentration of hydrogen and fraction containing carbon monoxide, where rate of hydrogen supply is controlled by changing purity of hydrogen in fraction containing increased concentration of hydrogen.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic description showing an ethanol synthesizing apparatus.    Ethanol synthesizing apparatus (100)    Fermetation vessel (104)    Separator (112)    Hydrogenation reactor (118)    Stripper (150)