Grain-Based Ethanol

Grain-Based Ethanol

Strengthening India’s Clean Energy Future

About Grain-Based Ethanol

Ethanol is an alcohol-based biofuel produced from plant-based raw materials and is widely used as a cleaner renewable fuel by blending with petrol to reduce vehicular emissions and improve fuel efficiency.

Grain-based ethanol distilleries primarily utilise maize, sorghum, broken rice, and other surplus or damaged grains. Starch in the grains is converted into fermentable sugars, which are then fermented and distilled to produce ethanol.

Grain-based ethanol plays a critical role in India’s Ethanol Blending Programme (EBP) by supplementing sugar-based supplies, ensuring year-round ethanol availability, reducing carbon emissions, strengthening energy security, and supporting farmers and rural economies.

Grain Based Ethanol

Grain-Based Ethanol Production Process

Grains (Maize / Broken Rice / Sorghum / Others)
Cleaning & Milling
(Removal of impurities and grinding of grains into flour/grits)
Slurry Preparation
(Mixing milled grain with water)
Liquefaction
(Starch is gelatinised using heat and enzymes)
Saccharification
(Conversion of starch into fermentable sugars using enzymes)
Fermentation
(Sugars converted into ethanol using yeast)
Distillation
(Separation and concentration of ethanol)
Dehydration
(Removal of water to produce fuel-grade anhydrous ethanol)
Anhydrous Ethanol (99.5%)
Supply to OMCs for Ethanol Blending with Petrol

By-Products Utilisation

🐄 DDGS(Distillers Dried Grains with Solubles) → High quality animal feed
🫧 CO₂ → Beverage, industrial, or dry ice applications
♻ Spent Wash / Water → Treated and recycled (Zero Liquid Discharge)

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