As sewage enters a plant for treatment, it flows through a screen, which removes large floating objects such as rags and sticks that might clog pipes or damage equipment. After sewage has been screened, it passes into a grit chamber, where cinders, sand, and small stones settle to the bottom.
The purpose of a public or private water treatment facility is to make water potable (safe to drink) and palatable (pleasant to taste) while also ensuring that there is a sufficient supply of water to meet the community’s needs.