Written by: Xuân Phi, 08/01/2024
Supported by: Ex-BC Examiner, 09/01/2024
Question: The diagram illustrates how recycled paper is made. Summarise the information by selecting and reporting the main features and make comparisons where relevant.
(IELTS Academic – 06/01/2024)
The diagram details the process of producing recycled paper. Overall, the process comprises four primary stages, commencing with a pulping phase, followed by filtration and cleansing stages, and culminating with the final recycled paper being rolled.
Regarding the pulp production and filtration stages, the boxes containing used paper are placed on a conveyor belt and transferred to a tank filled with water and chemicals. Subsequently, the paper is converted into pulp for additional processing. Next, the pulp is transferred to a receptacle equipped with perforations to eliminate impurities and then poured into a container.
Concerning the cleaning and papermaking stages, the pulp is put into a large floatation tank filled with water and soap. Air is pumped into the tank to help remove ink, enhancing the purity and whiteness of the pulp. Once the pulp has been de-inked, it is moved to another tank with water and chemicals for a final cleaning. In the next step, the pulp passes through heated rollers, during which water is extracted. Finally, long rolls of recycled paper are produced.
(Word count: 177)
|For additional processing
|Để xử lí thêm
|A receptacle equipped with perforations
|Thùng chứa có đục lỗ
|Loại bỏ tạp chất
|Sự tinh khiết