The diagram illustrates the process to manufacture ethanol fuel made from corn.
Overall, it is clear that the process has 9 main stages, beginning with harvesting corn and ending with delivering end products to customers.
The process commences with collecting and storing so that they can be milled. Follows this, the milled corn is occupied with water and boiled for 4 hours and then is taken place fermentation for 18 hours. The process continues when the fermented product is separated into two different parts including liquid and solid by-product. While the solid by-product is removed and got out of the process, the liquid part is used in the next steps.
The next stage is carried out when the previously separated liquid is used to extract pure ethanol, which takes 5 hours. The process concludes when the pure product is stored and transported to customers.