Production of bioethanol from grains
Grains are a classic raw material for the production of bioethanol. Cereals such as corn and wheat, which grow all over the world, act as reliable and affordable sources of raw materials. The use of bioethanol, produced from these crops, helps reduce dependence on petroleum products and decrease emissions of harmful substances into the air, making it attractive for sustainable development and achieving energy independence.
Bioethanol (known as fuel ethanol in the USA) is anhydrous ethyl alcohol made from renewable raw materials.
Production of bioethanol from grains
One of the main advantages of using grains for bioethanol production is their abundance and availability.
The process of making bioethanol from grains involves several main stages: grain preparation, conversion of complex carbohydrates in grains into simple ones, fermentation of carbohydrates, alcohol separation, and dehydration of alcohol.
At the first stage, all types of grains entering production are cleaned of organic, mineral, and metal impurities. The cleaned grains are then weighed and ground. The next technological stage involves preparation, thermo-enzym, and cooling of the mash. The purpose of these processes is to prepare starch for saccharification by amylolytic enzymes.
Saccharification of the wort can be carried out in a traditional separate apparatus (saccharifier) or in a fermenter. The sugared wort ferments in fermenters. After fermentation is completed, the resulting matured wort is distilled. In this process, a distillation column is used to isolate volatile alcohol based on differences in evaporation. The stillage from the distillation column, pre-cooled in the recuperator, is sent to the biogas station. After distillation and rectification, dehydration and denaturation take place. The obtained bioethanol can be used as fuel.
The production of bioethanol from grains has numerous environmental advantages compared to traditional fossil fuels:
• Reduction of greenhouse gas emissions: The use of bioethanol contributes to the reduction of carbon dioxide emissions, helping in the fight against climate change and global warming.
• Utilization of waste: During the production of food crops, waste materials such as sorghum are often generated. The use of these wastes for bioethanol production allows for efficient resource utilization and reduces the negative impact on the environment.
• Reduction of dependence on oil imports: Bioethanol production from local raw materials such as grains helps reduce dependence on oil imports and enhances the country’s energy independence.
