the classification of filtration filtration style granular bed filtration precoat filter filter media sand, anthracite coal GAC de filtration hydraulic: gravity filters pressure filters rate of filtration: rapid granular bed filter, slow sand filter distribution of deposit: depth filtration, cake filtrationthe Classification of filtration: filtration style: granular bed filtration, precoat filter filter media: sand, anthracite coal , GAC, DE filtration hydraulic: gravity filters, Pressure filters rate of filtration: rapid granular bed filter, slow sand filter distribution of deposit: depth filtration, cake filtration