What is the main purpose of filtration in water treatment?

Filtration in water treatment primarily serves the purpose of acting as a barrier against pathogens. This process not only involves the removal of suspended solids and larger particles but also contributes to the overall safety of the water by reducing or eliminating microorganisms that can pose health risks. Through various filtration methods, such as sand filters or membrane filters, pathogens like bacteria, viruses, and protozoa can be physically removed from the water supply, thus ensuring that the water delivered for consumption is safe and meets health standards.

While other aspects of water treatment involve removing large particles or addressing residual chemicals, the key role of filtration is to provide a means of pathogen removal, which directly impacts public health. It is also important to recognize that stabilization and temperature control are typically handled by different processes within the water treatment system and are not the primary function of filtration.