Sewage Disposal Unit Saves the Earth’s Water?

Before the wastes can enter the river, they have to be purified first. In order to make them purified, they have to pass some processes that in fact are not really complicated. First, all disposed wastes are flowed through the main sewer to be collected in a tank called settling tank. In this settling tank, the wastes are left to evaporate—in the end there will be two separated materials, undecayed solids and polluted water. The undecayed solids are removed and then burned, while the polluted water is pumped and flows through the pump house to the last place, the sprinkler beds. In the sprinkler beds, the water is entering the first filtrating process, which is rotated by the rotating arms. This will produce some jets of polluted water. These jets of polluted water then will be filtered by stones and microorganism on the brick work. There the water is totally purified and is available to enter the river.