What is the most common type of media used for coarse filtration?

The most common type of media used for coarse filtration is granular media. Granular media are typically made of materials like sand or gravel, which provide an effective and efficient means of removing larger particles from water. The relatively larger size of the granules allows them to trap debris and sediment while permitting water to flow through, making them ideal for initial stages of filtration processes.

Surface media, while used in certain applications, primarily focus on providing filtration through a thinner layer that captures particles at the surface level rather than within a bulk medium. This can limit their effectiveness in situations where larger particulates need to be filtered out.

Activated carbon and chemical media serve specific purposes, such as adsorbing chemicals or removing contaminants, rather than functioning as coarse filtration. Thus, granular media stands out as the standard choice for this fundamental filtration role.