Filtration performance evaluation of depth filter media cartridges as function of layer structure and pleat count

Depth filter media are characterized by their multiple-layer structures. Three main parameters indicate the filtration performance of the filter media: initial pressure drop, dust loading characteristics and particle collection efficiency. Four samples of three-layer structure depth filter media with different upstream and downstream layers were prepared to evaluate the effects of layer structure on filtration performance. The filtration performance of these media was closely observed by testing filter cartridges of the same dimensions. The results indicate a slow increase in pressure drop due to uniformly distributed particle loading inside the filter media and a high particle collection efficiency of the cartridge with new depth filter media. This media combines a bulky upstream layer and a final layer of high collection efficiency, giving both satisfactory filtration performance and quality factor values.

Graphical abstractFour samples of three-layer structure depth filter media with different upstream and downstream layers were tested. The media which combine a bulky upstream layer and a final layer of high collection efficiency exhibit a slow increase in pressure drop due to uniformly distributed particle loading inside the media and a high particle collection efficiency giving satisfactory quality factor values.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Four samples of depth filter media are examined experimentally. ► We studied the extent to which layers affect the filtration performance. ► The thickness of upstream layer is counted for the pressure drop pattern. ► Particle collection efficiency and air permeability are affected by final layer.