There are several types of filtration systems used in various industries, including mechanical, hydraulic, and air filtration systems. Mechanical filtration involves the use of physical barriers, such as screens, meshes, or fabrics, to trap contaminants. Hydraulic filtration systems use media filters to remove particles and other impurities from hydraulic fluids, while air filtration systems use filters to remove dust, pollen, and other particles from the air. Other types of filtration systems include reverse osmosis, ultrafiltration, and nanofiltration, which use membranes to remove contaminants from liquids.