The diagram illustates the rain water treatment process.
Overall, there are 5 streamlined stages in the rain water treatment process, beginning with collecting rainwater from houses and culminating in fresh drinking water. It is also clear that the only raw material is rainwater itself, while there are virtually no by-products.
At the first stage of the process, rainwater is collected from houses, before transport to the water filter through drain pipes. Then, the collected water is filtered in order to remove dirts. After that, the purified water is stored in a large storage before undergoing treatment, where chemicals are added to remove impurities and bacterias contained. Finally, the clean water is transported back to houses and served as drinking water.
