Band 8+: The diagram below shows how ethanol fuel is produced from corn. Summarise the information by selecting and reporting the main features and make comparisons where relevant. You should write at least 150 words.

The diagram illustrates the process of producing ethanol fuel from corn.

Overall, the production of ethanol fuel from corn involves a series of steps beginning with the collection and storing of corn and ending with the transportation of the final product. The process includes both physical and chemical stages and takes several days to complete.

Firstly, corn is harvested and stored before being sent to a milling stage, where it is ground into smaller particles. Following this, water is added and the mixture is cooked for four hours. Once the cooking is complete, the substance undergoes a fermentation process which lasts for 48 hours.

After fermentation, the mixture is separated into two components: a solid by-product and a liquid. The solid part is removed, while the liquid component is sent for purification, a process that takes five hours. Finally, the purified ethanol is stored and then transported to be used as fuel.

To summarize, ethanol fuel production from corn is a nine-step process that includes storage, mechanical milling, cooking with water, fermentation, separation, purification, and eventual transportation of the fuel.