Kho đề / Task 1 Academic

How drinking water is treated

TASK 1 · PROCESS#Sức khoẻ
The diagram below shows the stages in the treatment of water from a river to make it safe to drink. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.

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How drinking water is treated (IELTS Writing Task 1 process)How drinking water is treated, in seven steps. 1 Screening: water is taken from a river through a screen that removes large objects. 2 Coagulation: a chemical (alum) is added so that dirt particles stick together. 3 Sedimentation: in a large tank the particles sink to the bottom as sludge. 4 Filtration: the water passes through layers of sand and gravel. 5 Disinfection: chlorine is added to kill bacteria. 6 Storage: the clean water is stored in a water tower. 7 Supply: it is piped to homes.How drinking water is treatedRiverALUMsandgravelCl1Screeninglarge objects removed2Coagulationparticles stick together3Sedimentationparticles sink as sludge4Filtration5Disinfectionchlorinekills bacteria6Storage7Supply to homesCLIMB IELTSclimbielts.com