Filter medium, process for preparation thereof, filtering method and filtering apparatus

摘要

A filter medium comprising a body of the filter medium having the space thereof partitioned three-dimensionally, irregularly and manifoldly by bent linear members having a strength sufficient to cause substantially no substantial deformation when the filter medium is actually used, and an effluent pipe connected to the body of the filter medium, said effluent pipe having an opening located in the interior of the body, from which a filtrate flows out, is disclosed. When at least one component is filtered or separated from a material to be treated by filtrate the dispersion medium as the filtrate is interposed between a filter cake and the surface portion of the body of the filter medium and the dispersion medium as the filtrate is allowed to pass very easily through the filter cake. Accordingly, clogging is not caused in the filter medium and the filtration can be performed at a substantially uniform flow rate throughout the operation. In addition, a process for the preparation of such filter medium and a filtering method and apparatus using such filter medium are provided. This filter medium can be effectively used in any field for separating components from dispersions, for example, separating oils from water.