NOVELTY - Fuel ethanol producing mobile apparatus comprises pretreatment collector (10), ethanol-miscible liquid and captured ethanol separator, extractor (13), and fermentation reactor (12) for pretreatment product. The collector comprises mixing unit for combining and comminuting the contents to form comminuted biomass, heating unit for heating contents of collector, and unit for introducing ethanol-miscible liquid and digesting agents for forming pretreatment product containing simple sugars.    USE - The mobile apparatus is useful for producing ethanol from cellulosic biomass used as alternative fuel.    ADVANTAGE - The mobile apparatus contains units that are mounted for easy deployment to various locations in the vicinity of numerous growing sites which produce the biomass. The mobile apparatus is readily adaptable to new innovations in the biomass to ethanol process. The mobile apparatus allows removal of ethanol and organic inhibitors during fermentation and increased ethanol production. The mobile apparatus eliminates the need for costly distillation and high water consumption to extract the ethanol. The apparatus allows production of biodiesel when replacement is needed. The apparatus allows for extended batch fermentation and efficient ethanol extraction. The apparatus offers a solution to the transporting challenge by use of ethanol mobile bioreactor units at the site of biomass growth.    DETAILED DESCRIPTION - Fuel ethanol producing mobile apparatus comprises pretreatment collector, ethanol-miscible liquid and captured ethanol separator, extractor, and fermentation reactor for pretreatment product. The collector comprises mixing unit for combining and comminuting the contents to form comminuted biomass, heating unit for heating contents of collector, and unit for introducing ethanol-miscible liquid and digesting agents for forming pretreatment product containing simple sugars. The fermentation reactor includes agitator, unit for introducing the pretreatment product including ethanol miscible liquid into the vicinity of agitator unit, and unit for introducing fermenting agent including microorganism to be mixed with product by agitator to produce ethanol captured by ethanol-miscible liquid. The ethanol-miscible liquid and captured ethanol separator separates ethanol-miscible liquid and captured ethanol in the layer to form output from the reactor. The extractor comprises heater and condenser receiving the output. The heater heats the output to the boiling point of ethanol to form gaseous distillate and residual product. The condenser receives the gaseous phase of the distillate and liquefies the distillate for collection. The pretreatment collector receives content including biomass. The biomass comprises cellulosic vegetation, water, and hydrolyzing agent. The ethanol-miscible liquid separates from pretreatment product in the fermentation reactor to form separate layer of ethanol-miscible liquid in the reactor. An INDEPENDENT CLAIM is included for producing ethanol comprising supplying batch including biomass containing cellulosic vegetation, hydrolyzing agent, and water; mixing and comminuting the batch to form biomass; pretreating the biomass by introducing ethanol-miscible liquid and digesting agents to form pretreatment product containing simple sugars; transferring the product into fermentation reactor; providing layer of ethanol miscible liquid overlying the product in the reactor; mixing a fermenting agent including microorganism(s) into the product; allowing fermentation to produce ethanol migrating into the layers and is capture by it; outputting the fermented product; heating output to form gaseous ethanol distillate and residual product; and cooling the gaseous distillate and liquefying it for collector.    DESCRIPTION OF DRAWING(S) - The figure shows a flow diagram of the producing ethanol from cellulosic biomass.    Pretreatment collector (10)    Fermentation reactor (12)    Extractor (13)    Ethanol receptacle (14)    Vegetable oil reservoir (15)    Filter (16)    Purification filter (16)