Process Diagram

Band 6+: the diagram show the process of water treatment, Summarise the information by selecting and reporting the main features

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Image for topic: the diagram show the process of water treatment, Summarise the information by selecting and reporting the main features

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The image depicts the water treatment process beginning at 1: Intake Screens, followed by 2: Pumps directing water towards 3: Flash Mix using polyaluminum chloride and added coagulants, progressing to 4: Flocculation where suspended particles aggregate, then moving to 5: Settling Basin where particles settle, continuing to 6: Chlorine addition to ensure disinfection, passing through 7: Filter Membrane for further purification, encountering 8: Disinfection employing chlorine, lime as sodium hydroxide, and fluoride, moved by 9: Pump to reach 10: Faucet, completing the water treatment process.

Given the complexity of the image, the above description may not be entirely accurate.

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The diagram illustrates a process of the water purification, which involves 10 steps.

Overall, this is a manual and linear process of water filtration which compramises multi-stage industrial operation starting with water being pumped and ending with the filtration of water.

Primary steps begin with the intake screens that are located under a river in order to pump raw water which flows through the tube until it reaches the next step consisting of flash mix. Afterwards, water goes through a bend in the pipe until it gets to a flocculation stage where crumbs are absorbed, after that there is a settling basin process which is similar to the flocculation one.

Secondary stages involve more complex equipment such as filters. The first step of the primary process starts with the use of cholorine. Before water is ready to undego the disinfection process, there is a process of membrane filtration. Ultimately, after the disinfection stage, water is pumped and can be used.

Word Count: 160

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Overall Band Score

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Vocabulary Complexity:
C1 - Intricate
Strive to incorporate even richer and more precise language.

Grammar Mistakes: N/A

Vocabulary Repetition:

water: 7

process: 6

which: 4

filtration: 3

Try using synonyms for the above words

Task Response

The report attempts to describe the water treatment process and identifies the main stages, but it contains some inaccuracies and omissions. The overview mentions a linear process, which is appropriate, but the description of the steps is not entirely accurate or complete. For example, the report incorrectly states that the process ends with filtration, while the diagram shows it ends with the faucet. Additionally, some details like the use of polyaluminum chloride, lime, and fluoride are omitted, and the order of steps is slightly confused (e.g., chlorine addition and membrane filtration are misplaced). The language is generally clear, but there are some errors in word choice and spelling (e.g., 'compramises' instead of 'comprises', 'undergo' misspelled). To improve, focus on accurately reporting all key stages in the correct order and ensure the overview reflects the entire process from start to finish.

Coherence & Cohesion

The report has a clear overall structure with an introduction, an overview, and a description of the main stages. However, the progression of ideas is sometimes unclear, particularly in the second paragraph where the description of 'primary steps' and 'secondary stages' becomes confusing. The use of cohesive devices is adequate but could be more varied and precise to improve the flow. Consider using clearer sequencing language (e.g., 'first', 'next', 'then', 'after that') and ensuring that each paragraph focuses on a distinct set of stages to enhance coherence.

Lexical Resource

The vocabulary used is generally appropriate for the task, with some good attempts at technical terms (e.g., 'flocculation', 'membrane filtration'). However, there are some inaccuracies and awkward phrasings (e.g., 'compramises' instead of 'comprises', 'crumbs are absorbed' instead of 'suspended particles aggregate', 'undego' instead of 'undergo'). To improve, focus on using more precise and natural vocabulary related to water treatment processes, and proofread for spelling errors. A wider range of synonyms and more sophisticated collocations would also enhance the lexical resource.

Grammatical Range & Accuracy

The report demonstrates a reasonable range of grammatical structures, including some complex sentences. However, there are several grammatical errors and awkward constructions that affect clarity (e.g., 'a process of the water purification' should be 'a process of water purification', 'which compramises multi-stage industrial operation' should be 'which comprises a multi-stage industrial operation', 'water goes through a bend in the pipe until it gets to' could be more concise). Punctuation is generally correct but could be improved. To achieve a higher score, aim for more consistent accuracy and use a wider variety of sentence structures with full control.

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