The diagram illustrates the respective stages of how an Australian town stores and converts rainwater into purified water.
Overall, the system is a closed-loop process involving five distinct processes, beginning with the collection of rainwater from residential rooftops and ending with the distribution of treated water back to households. The process integrates both physical filtration and chemical treatment to ensure the water is safe for consumption.
Initially, rainwater is collected from the roofs of houses and goes through a series of pipes. These pipes channel the water into a common underground system, which leads directly to a filtration unit. At this stage, larger particles and debris are removed to ensure cleaner water for subsequent steps. The filtered water is then transferred into a storage tank, where it is held temporarily.
In the second part of the process, the purified water flows into a separate treatment tank during which chemicals are added to eliminate harmful microorganisms and ensure it is potable. Finally, the processed water is delivered through a network of pipes to each household in the town.