The given illustration demonstrates how running water is created through the purification of river water.
Overrall, the process involves multiple stages, starting with water being collected into pump house and ending with the distribution of fresh water to households.
Initially, water is pumped from the river through a screen that removes large rubbish. It is then treated with potassium permanganates before entering the coagulation where coagulant is add to allocated dirty and clean water. From this point onward, two type of water are treated in different ways.
Subsequently, waste water is transferred to sediment dewatering press to produce dry solids, after which it is transported away for farming while the surplus water is returned to early stages to continue purifying. Meanwile, once chlorine is added, clean water goes through a filtration system where it passes layers of sand, gravel and anthracite to remove small solid particles. Following this step, some chemicals such as chlorine, fluoride and orthophosphate are put in to make the water safe to use. Ultimately, the clean water is stored in a clear well and then pumped into a water tower, where it is distributed to people’s homes.