Filtration with sedimentation: Application of Kynch's theorems

Filtration at moderate rates on upward-facing horizontal surfaces is accomp anied by sedimentation. Kynch theorems developed for sedimentation in the n oncompression range can be adapted to explaine the evolution of the cake su rface and the filtrate volume with time. The different relationships obtain ed have been tested with filtration + sedimentation runs and filtration wit hout sedimentation runs carried out with calcium carbonate suspensions at m oderate pressure differences from 17 to 97 mmHg. The differences between th e average specific resistance observed at the different runs can be satisfa ctorily explained by the fundamentals of the theory.