A horizontal cylindrical continuous decanter is to separate 1,500 bbl/d (9.93 m3/h) of a liquid
petroleum fraction from an equal volume of wash acid. The oil is the continuous phase at the
operating temperature has a viscosity of 1.1 cP and a density of 54 lb/ft3 (865 kg/m3). The
density of the acid is 72 lb/ft3 (1,153 kg/m3). Determine the size of the vessel and the height of
the acid flow above the vessel floor.