Task 1 — Mô tả quy trình

The diagram below shows a water recycling system in a modern city. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

**Diagram description:** The process begins with wastewater from households and industries, which is collected and sent to a treatment plant. After undergoing primary treatment (screening and sedimentation), secondary treatment (biological filtration), and tertiary treatment (disinfection and chemical processing), the water is either stored in reservoirs for reuse in non-potable applications (e.g., irrigation, industrial cooling) or discharged into rivers. The treated water can also be sent to a distribution network for drinking water after additional purification.