The picture illustrates the process of recyling water from downpour in a particular city in Australia.
Overall, this process involves a total of five stages, beginning with collecting rainfall and culminating with delivering the water to the household where it can be reused.
Looking at the first stage, rainwater is collected in a drainage system before being transferred to the water recycling plant through a main pipe below ground. Following this, the water undergoes several treatment processes, which is categorized into 4 steps, starting with plastic and rubbish being removed from the water. The water is then filtered out of small particles, and subsequently the removal of bacteria and viruses at the plant. The final step of filtration is removing molecules and salt from water, ready for further phases.
The next step is called chlorine treatment, in which an amount of 4 mg/liter is added to water. After the process of mechanical filtration, the water is stored in a water tank. Finally, the recycled water is delivered to Australian households through the pipe for consumption.