| 摘要 |
A filter comprises a composite membrane of an electrically conducting sheet, e.g. a woven mesh of metal filaments, and a porous or microporous layer, e.g. of organic polymer or of partly sintered inorganic particles. The layer may overlie the sheet or be co-planar with it. An electric current is passed through the process liquid between the sheet and a counter electrode, and acts to loosen filter cake. Particularly when operated in a cross-flow mode, with intermittent imposition of electric current, the filter has an increased service life. |
