1. n. 
A filtration process in which the slurry being filtered remains static. Filter cake continues to grow thicker as filtration continues. Under static conditions, no cake erosion occurs. In theory, the filtrate volume increases as the square root of elapsed time, ignoring spurt loss.
Antonyms: dynamic filtration
Alternate Form: static filter press
See: capillary suction time test, filtercake, filter medium, filter-cake quality, filter-cake thickness, filtrate tracer, filtrate volume, fluid-loss control, fluid-loss-control material, high-pressure, high-temperature filtration test, hydroxypropyl starch, low-pressure, low-temperature filtration test, relative filtrate volume, spotting fluid, spurt loss