MICROFILTERING DEVICE Russian patent published in 1999 - IPC

FIELD: microbiological purification of domestic sewage on biofilm with removal of suspensions and biofilm fragments by microfiltering with production of biological fertilizer from sediment, and heavy water for the needs of nuclear power-from clarified water. SUBSTANCE: sewage preliminarily treated in biofilters is fed to conical flexible filtering partition mounted on the upper disk with the narrower base, and with the wider one freely suspended relative to the flexible rings of the lower disk. The means of partition deformation is made in the form of parallel flexible rings fitted on the lower disk, which is made for reciprocating motion. The sewage discharge pipe connection communicates with the sewage collector through filters. EFFECT: enhanced efficiency of purification.