Question

explain the stages of water treatment as shown above.

Explanation:

The primary treatment starts with a bar - screen to remove large debris. Then, in the grit chamber, sand and gravel settle. The settling tank separates sludge from the water. In secondary treatment, the aeration tank uses air and activated sludge to break down organic matter. Another settling tank separates the treated water from the remaining sludge. Chlorine disinfection tank kills bacteria. Finally, sludge is processed in a digester and dried on a bed for disposal.

Answer:

The primary treatment includes bar - screening to remove large solids, grit chamber to settle sand and gravel, and a settling tank to separate sludge. Secondary treatment has an aeration tank for organic matter breakdown using air and activated sludge, a settling tank for further separation, and a chlorine disinfection tank to kill bacteria. Sludge is digested and dried for disposal.