The diagram illustrates the various stages in the production of ethanol fuel from corn.
Overall, there are nine stages in the process of corn ethanol production, beginning with harvesting the corn and ending at the delivery stage.
At the first stage in the corn ethanol making process, corn is harvested and then put in a suitable place to ensure safe storage before it is ready for milling. During the milling stage, the corn is ground into a fine powder, which is then mixed with water. The resulting mixture is cooked for four hours.
After cooking, the mixture undergoes a fermentation process, which takes two days, and ethanol is produced after this stage. After that, the liquid ethanol is separated from the fermented mixture, during which some solid by-products are taken out. It then takes five hours for the resulting ethanol to be purified to remove any impurities. Finally, this ethanol is stored for a set period of time before being transported to retailers, ready to be sold.