TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Processes: Acorn kernel shell is separated by immersing acorns in water, swelling for 10-120 hours, taking out, air-drying or drying to separate acorn shell and acorn core, rolling acorn to shell acorn, and separating acorn shell and acorn core using air-separating device in which weight ratio acorn shell:acorn core is 1:1-1:5. Carbonization and activation are performed by heating acorn shell to 300-1000 degrees C in absence of oxygen to prepare coke and obtain syngas and wood vinegar byproducts, heating coke to 700-900 degrees C, introducing steam, and activating to prepare activated carbon. Wood vinegar is used as fungicide, disinfectant, and insect repellents. Extraction of oil and tannins is solvent extraction. Oil and tannins are extracted by adding acorn powder to ethanol with solid-liquid mass ratio of 1:1.5-1:5, maintaining temperature at 50-90 degrees C for 1-4 hours, cooling to room temperature, performing solid-liquid separation, adding 0.5-2 times the amount of ethanol to solid phase, washing with ethanol 1-3 times, collecting liquid fraction, adding to 0.2-0.5 times the total volume of water, dissolving in anhydrous ethanol, to release oil, standing to stratify, and collecting liquid upper layer which is oil with yield of 0.1-0.3 ton/ton ethanol. Ethanol solution obtained from extraction of oil and tannins is distilled to recover ethanol, using condensate in emulsion formation, concentrating tannin-containing water in distillation tower kettle, drying valonia tannin to obtain tannin with yield of 0.3-0.6 ton/ton ethanol, and sending secondary condensate to environmental protection device with discharge amount of 4.5-9 m3/ton ethanol. Emulsion is formed by adding water to dried acorn powder with solid-liquid mass ratio of 1:1.5-1:3, adjusting pH to 5-6, and stirring. Liquefying is performed by adding high-temperature alpha -amylase to acorn powder emulsion with addition amount of 10-30 U/g acorn powder and liquefying at 80-100 degrees C for 0.5-2 hours, and saccharifying is performed by cooling liquefied acorn powder emulsion to 40-60 degrees C, adjusting pH to 4-5, adding starch glucoamylase with addition amount of 50-150 U/g acorn powder and cellulase with addition amount of 0.1-0.5 U/g acorn powder, and heating at 40-60 degrees C for 8-72 hours. Ethanol fermentation is performed by adding 0.1-0.2 g/L nitrogenous compound to dual-enzyme-hydrolyzed acorn powder emulsion, culturing at 28-38 degrees C for 16-24 hours to obtain tannin-tolerant yeast, adding 0.1-2 g/L nitrogenous compounds to acorn powder emulsion, inoculating in yeast seed liquid with inoculum amount of 1-20 wt.%, fermenting at 28-38?OC for 24-48 hours, distilling to obtain 95 vol.% ethanol, and dehydrating with molecular sieve to obtain anhydrous ethanol. DDGS is produced by separating distillation bottoms liquid using plate and frame filter press to obtain residue which is concentrated distillers grains containing 50-80 wt.% water and concentrating and drying in steam pipe rotary dryer to 5-15 wt.% water. Post-treating in environmental protection device comprises anaerobic treatment, aerobic treatment, and activated carbon adsorption in which effluent from aerobic treatment is sent to activated carbon adsorption step. Preferred Compositions: Activated carbon yield is 0.1-0.8 ton/ton of ethanol, syngas yield is 120-1200 m3/ton ethanol, and syngas calorific value is 4000-6000 kcal/m3. Wood vinegar yield is 0.1-0.6 ton/ton ethanol. Solvent in solvent extraction is ethanol. Ethanol fermentation ethanol yield is 3.5-4.5 tons acorn powder/ton ethanol. DDGS yield is 0.6-1.2 tons/ton ethanol. Anaerobic treatment produces biogas with yield of 10-20 m3/ton ethanol and calorific value of 4000-6000 kcal/m3.