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The diagram shows how to produce ethanol from corn.

The diagram shows how to produce ethanol from corn.

The given diagram illustrates the sequential phases involved in the production of ethanol from corn.
Overall, the process comprises seven key steps, commencing with the steeping of corn and concluding with the dehydration to obtain anhydrous ethanol.
The initial step is when corn is soften in water before being put into the removal system to separate germ or fiber in corn resulting in two types of outcomes: Corn oil and corn germ meal. Subsequently, the gluten is split , leading to the production of corn gluten meal. The resulting corn are afterwards dried in the drying stage to produce corn gluten feed.
Following this, the process continues with corn being liquefied and saccharified. During this step, α-amylase and glucoamylase are added to make either corn syrup or high fructose corn syrup while others are fermented. This step involves the addition of yeast whereas carbon dioxide releases. In the following step, fermented mixture is put into distillation before being dehydrated which aimed to produce anhydrous ethanol.


Gợi ý nâng cấp từ vựng

Errors and Improvements:

  1. "corn is soften" -> "corn is softened"
    Explanation: The correct verb form is "softened" to convey the action of making corn soft in water. The original "soften" is an incorrect usage in this context.

  2. "separating germ or fiber in corn resulting in two types of outcomes" -> "separating the germ or fiber in corn, resulting in two types of outcomes"
    Explanation: Adding the definite article "the" before "germ" helps improve the clarity of the sentence structure. Additionally, a comma is inserted after "corn" to enhance readability and indicate a pause in the sequence of actions.

  3. "corn are afterwards dried" -> "corn is afterwards dried"
    Explanation: The subject "corn" is singular, so the correct verb form is "is" instead of "are" to maintain grammatical agreement.

  4. "the process continues with corn being liquefied and saccharified" -> "the process continues with the liquefaction and saccharification of corn"
    Explanation: Restructuring the sentence for conciseness and clarity, and using the gerunds "liquefaction" and "saccharification" instead of the verbs to maintain a more formal and technical tone.

  5. "make either corn syrup or high fructose corn syrup while others are fermented" -> "produce either corn syrup or high fructose corn syrup, while the rest undergo fermentation"
    Explanation: Replacing "make" with "produce" adds precision to the description of the outcomes. Also, specifying "the rest undergo fermentation" clarifies the subsequent action in a more structured manner.

  6. "This step involves the addition of yeast whereas carbon dioxide releases." -> "This step involves the addition of yeast, resulting in the release of carbon dioxide."
    Explanation: The original sentence lacks clarity. By rephrasing and specifying that the addition of yeast leads to the release of carbon dioxide, the connection between the two actions becomes more evident.

  7. "fermented mixture is put into distillation before being dehydrated which aimed to produce anhydrous ethanol." -> "the fermented mixture undergoes distillation before undergoing dehydration, aimed at producing anhydrous ethanol."
    Explanation: Improving parallelism by using "undergoes" for both distillation and dehydration, and restructuring the sentence for clarity and precision.

Band điểm Task Achivement ước lượng: 6

Band Score: 6.0

Explanation:
The essay generally addresses the process of ethanol production from corn, covering the sequential phases adequately. It provides an overview of the steps involved, describing the key stages in the process, such as steeping, separation of components, drying, liquefaction, saccharification, fermentation, distillation, and dehydration.

How to improve:
To enhance the score, consider refining the clarity and coherence of the descriptions. Ensure precision in explaining each phase of the process, using more accurate terminology and detailing the relationships between the steps. Additionally, focus on improving grammar and sentence structure to convey ideas more effectively. Providing specific quantities or timeframes, where applicable, could further enrich the content and improve the overall quality of the response.

Band điểm Coherence & Cohesion ước lượng: 6

Band Score: 6.0

Explanation:
The essay presents a generally coherent structure with an attempt to organize the information sequentially. The introduction provides an overview of the sequential phases of ethanol production from corn, offering a clear roadmap of the process. There is an effort to establish coherence between the steps, albeit with occasional disruptions in the flow due to some sentence structure issues and lack of clarity in connecting certain ideas.

The use of cohesive devices is attempted but is inconsistent. While some transitions are used to link ideas within sentences and between steps, there are instances where the connectivity is not entirely clear. The essay employs some technical terms and attempts to maintain a logical progression, though at times, this progression is not effectively maintained, affecting overall coherence.

Paragraphing is attempted but lacks uniformity and logical division. Some ideas within paragraphs could be better separated for clearer organization and coherence. Despite the overall structure being discernible, improvements in the logical arrangement of ideas and smoother transitions between steps are needed for enhanced coherence.

How to improve:

  1. Work on sentence structure for better clarity and coherence.
  2. Ensure consistent use of cohesive devices to connect ideas throughout the essay.
  3. Improve paragraph organization for a more logical and distinct division of ideas.
  4. Pay attention to maintaining a smoother progression between steps, avoiding disruptions in the flow of information.

Please note that enhancing the clarity of sentence structure, strengthening the use of cohesive devices, and refining paragraph organization will significantly contribute to improving the coherence and cohesion of the essay towards a higher band score.

Band điểm Lexical Resource ước lượng: 7

Band Score: 7.0

Explanation:
The essay demonstrates a sufficient range of vocabulary, allowing for some flexibility and precision. The writer uses less common lexical items with some awareness of style and collocation. The essay effectively communicates the sequential phases of ethanol production from corn. There is a variety of vocabulary used to describe the different stages, and the writer employs specific terms such as "saccharified," "α-amylase," and "dehydrated," showing a good command of technical terminology related to the process. However, there are occasional errors in word choice and collocation, such as "soften" instead of "softened" and "aimed to produce" instead of "aiming to produce." Additionally, there are minor issues with sentence structure and coherence that slightly affect the overall fluency.

How to improve:
To enhance the lexical resource and overall band score, the writer should pay attention to word choice and ensure accurate collocation. Proofreading for minor errors in verb tense and sentence structure can further improve the overall fluency of the essay. Additionally, the use of more sophisticated transitions between sentences and ideas can contribute to a smoother flow of information. Consider revising sentences like "The resulting corn are afterwards dried" to "The resulting corn is then dried" for better clarity and accuracy.

Band điểm Grammatical Range & Accuracy ước lượng: 7

Band Score: 7.0

Explanation:
The essay demonstrates a good command of grammar and punctuation with a variety of complex structures. Most sentences are error-free, contributing to effective communication. The use of transitional phrases helps in maintaining coherence and clarity throughout the essay. However, there are some instances of awkward phrasing and minor errors that slightly impact the overall fluency.

How to improve:
To enhance grammatical accuracy and range, consider refining the use of complex structures and ensuring consistency in sentence construction. Review sentences that may seem a bit awkward and rephrase them for better clarity. Pay attention to the correct use of articles, prepositions, and verb tenses to eliminate minor errors and further elevate the overall quality of the essay.

Bài sửa mẫu

Certainly! Here’s an improved version of the original report:


The provided diagram outlines the sequential stages involved in the production of ethanol from corn.

Overall, the process involves seven distinct steps, starting with the steeping of corn and culminating in the dehydration phase to obtain anhydrous ethanol.

Initially, the corn is soaked in water and then transferred to a separation system to extract the corn germ or fiber, resulting in two primary outcomes: corn oil and corn germ meal. Subsequently, the gluten is divided, leading to the production of corn gluten meal. The resulting corn is then dried in a subsequent stage, resulting in corn gluten feed.

Following this, the process proceeds with the liquefaction and saccharification of corn. During this phase, α-amylase and glucoamylase enzymes are introduced to produce either corn syrup or high fructose corn syrup, while other components undergo fermentation. This step involves the addition of yeast, resulting in the release of carbon dioxide. In the subsequent phase, the fermented mixture undergoes distillation before being dehydrated, aiming to produce anhydrous ethanol.

Overall, the production of ethanol from corn involves a series of interconnected stages, each contributing crucially to the eventual extraction of anhydrous ethanol.


This revised version aims to refine grammar, enhance coherence, and maintain the original information while adhering to the IELTS Task 1 format.

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