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Dual-layer granular beds consist of a lower layer of fine granules and an upper layer of coarse granules. In order to study the individual functions of the two granular layers with respect to filtration, a small granular bed filtering device (inner diameter of 100mm) was employed. The two granular layers were separated using a wire mesh such that the upper layer was laid over the wire mesh. A welas®...
Here we investigated the filtering characteristics of a powder-grain dual-layer granular bed filter to improve its filtration efficiency in an experimental granular bed filter apparatus (inner diameter, 100mm) with aerosol particles generated by firing a smoke agent. The concentration and size distribution of the aerosol particles upstream and downstream of the granular bed filter were detected using...
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