The diagram shows the process of making ethanol fuel from corn.
Overall, it is clear that there are 9 stages in the entire ethanol producing process, beginning with the collection of corn and ending with the delivery of ethanol fuel.
In the initial step, corn is harvested from farms and then delivered to storage to preserve it for subsequent processing. Subsequently, the corn is transferred to milling machines, where it is ground into powder and mixed with water. Following this, the resulting mixture undergoes a four-hour cooking process and is allowed to ferment for a two-day period.
Once the fermentation is completed, the substance is separated into liquid and solid forms of ethanol. After that, while the liquid ethanol is purified to remove any remaining impurities and subsequently stored, the solid by-products are disposed of. In the final stage, the ethanol fuel is consumable and transported to the final destination, ready to sell for customers.