The process of passing the water through the beds of granular materials is known as _____. 

Concept:

The process of treating water to remove impurities and contaminants involves several steps. One key step is the process where water is passed through beds of granular materials to remove suspended particles and impurities.

Filtration: This is the process of passing water through beds of granular materials such as sand, gravel, or activated carbon. Filtration removes suspended particles, impurities, and some microorganisms, making the water cleaner and safer for consumption.

Chlorination: This is the process of adding chlorine to water to disinfect it by killing bacteria, viruses, and other pathogens. Chlorination is typically done after filtration.

Infiltration: This refers to the process by which water on the ground surface enters the soil. It is not related to the purification of water through granular materials.

Disinfection: This is a broader term that refers to the process of killing or inactivating harmful microorganisms in water, typically through the use of chemicals like chlorine, ozone, or ultraviolet light. Filtration is usually a step before disinfection in water treatment.