What type of filters are most commonly used in potable water treatment?

Granular media filters are commonly used in potable water treatment due to their effectiveness in removing larger particles and impurities from water. These filters typically consist of layers of sand, gravel, or other granular materials that act as a barrier to capture sediments, algae, and organic matter. As water flows through these layers, the granular media creates a physical and biological filtration process. This not only helps in improving the clarity and quality of the water but also reduces the load on subsequent treatment processes.

Additionally, granular media filters can be designed to optimize the filtration rate and the removal of specific contaminants, making them versatile for various water sources. Their ability to undergo backwashing also allows for the removal of accumulated contaminants, extending the lifespan and efficiency of the filter system.

Other filter types, while useful in specific applications, generally serve more specialized purposes or target particular contaminants rather than serving as the primary filter type in standard potable water treatment processes.