TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The product is ethanol, lignin, polysaccharide, refined oil and residue for animal feed. The shivering process involves shivering of oil palm empty fruit bunches into pieces below 1 mm size, and carrying out steam extrusion process in steam extrusion vessel at 100-300 degrees C for 5-200 minutes. The lignin extraction process is carry in enamel reactor with chemical reagent under stirring at 60-70 degrees C for 3-8 hours. The cellulose and hemicellulose obtained from lignin extraction process will undergo preheated evaporation step for completely removing all reagent and solvent residue. The method includes after completion of the reaction, using nitrogen (or other inert gas) with pressure of 0.3-1.0 map in vacuum filtration system to compress and filter the mixture into a vacuum filtration vessel, where filter retains cellulose and hemicellulose, and lignin is dissolved in filtrate phase; after vacuum filtration, the chemical reagent which contains the lignin, is transferred into and recovered through solvent recovery system, where lignin is remained as residue of reagent recovery process; and after the pre-evaporation stage, introducing mixture into acidic hydrolysis process, where cellulose and hemicellulose is mixed with diluted sulfuric acid at constant ratio in saccharification vessel and stirred for 5-30 minutes. The acidic saccharification process is repeated for another one times by adding same constant ratio of diluted sulfuric acid and stirred for another 0.5-2.0 hours, after completion of saccharification process, again is neutralized with sodium hydroxide, potassium hydroxide and ammonia. The neutralized liquid will pass through centrifuge separator to separate into 2 phases by density difference. The centrifuge liquid phase produced from saccharification process with cellulose and hemicellulose after neutralization and filtration, undergoes fermentation process in a fermenter, with bacteria added and stirred at 10-40 degrees C for 2-6 hours. The crude polysaccharide syrup obtained from centrifuge separation undergoes another fermentation process after added in pre-treated solid enzyme and stirred for 1-4 hours at 20-30 degrees C. The fermented liquid is discharged, filtered off, undergone centrifuge separation and concentration enrichment to produce polysaccharides. EXAMPLE - No suitable example given.