Alcohol fermentation is a biotechnological process which allows the production of bio-ethanol from simple carbohydrates (glucose, sucrose, mannose) and from long chain polysaccharides (starch, cellulose, hemicelluloses). Therefore, the raw materials necessary for obtaining this biocombustible can be derived from alcohol producing dedicated cultures both sacchariferous (sugar beet, sugar sorghum, etc.) and starchy (soft wheat and corn) as well as from lignocellulose residuals. The production spinneret for bio-ethanol is articulated in three sections: saccharifer — ous, starchy and lignocellulosic.