Question

Cleaning of water is a process of removing ____________.

Answer 1

Cleaning of water:

1. The process of removing the pollutants from the water after which it becomes portable is referred to as cleaning of water.
2. The process of wastewater treatment is commonly known as sewage treatment.

Steps involved in sewage treatment:

1. There are two sets of pipes; one for clean water and the other for wastewater (pollutant).
2. The network of pipes used for the process of water treatment is known as sewers.
3. It's the process of transporting the sewage from the point it is produced to the point it has to be disposed of out via a drainage system (pipes).
4. Physical, chemical, and biological procedures are used in wastewater treatment to eliminate contaminating physical, chemical, and biological materials.
5. Large things such as rags, twigs, cans, plastic packages, napkins, and other items are removed by passing wastewater through bar screens.
6. After that, the water passes through a grit and sand removal tank, where the sand, grit, and pebbles settle.
7. The water is then allowed to settle in a tank, where particulates such as feces (known as sludge) settle at the bottom and are scraped away using a scraper.
8. A skimmer removes floatable materials such as oil and grease from the water. Clarified water is a term used to describe water that has been cleaned of impurities.
9. Biogas is made from sewage sludge.
10. After that, the clarified water is pushed through an aerator tank, which adds oxygen to the water. It promotes the growth of aerobic bacteria, which degrade organic substances such as human feces.
11. The floating bacteria settle as activated sludge at the bottom of the tank after many hours. The top layer of water is then removed. Manure is made from dried activated sludge.
12. The water from the top is collected and kept in a tank. Organic and suspended matter levels in the treated water are low. It's dumped into the sea, a river, or the Earth. It is sometimes treated with chemicals such as chlorine and ozone before being transported to municipalities.

Hence, cleaning water is a process of removing pollutants.