NOVELTY - The ultra-fine-formation apparatus (1) has a pair of disks (11,12) installed separately to form an ultra-fine-formation chamber (5), a support shaft (11A), a rotational drive unit for rotationally driving the disk, a supplier (13) for supplying to-be-processed fluid (W) to the chamber, protrusions (11C,12C) which protrude to each inner surface which the disk faces for not hitting during relative motion, and an ejector.    USE - The apparatus is useful for forming ultra-fine material of solid-containing fluid, such as fluid containing organic matter of food industries, livestock farming, sewage, and other waste materials, and for toilet purification.    ADVANTAGE - The apparatus efficiently and continuously forms ultra-fine material of fluid with desired particle size to a micron level, in a short time without fluid leakage. The apparatus has a simple structure.    DETAILED DESCRIPTION - The ultra-fine-formation apparatus (1) has a pair of disks (11,12) mutually facing and installed separately to form an ultra-fine-formation chamber (5) in between, a support shaft (11A) attached to the outer side of a disk along the center-shaft line of each disk, a rotational drive unit for rotationally driving the disk with a relative rotation speed of 500-1000 rpm through the support shaft(s), a supplier (13) for supplying to-be-processed fluid (W) to the ultra-fine-formation chamber through the support shaft(s), protrusions (11C,12C) which protrude to each inner surface which the disk faces for not mutually hitting during relative motion, and an ejector. The disks carry out relative rotation by the circumference of a common center-shaft line. The ejector ejects the ultra-fine material of the fluid cluster of the to-be-processed fluid introduced to ultra-fine-formation chamber interior, from the chamber after a particle size required to the level of a micron is reached, and/or its suspended matter by stirring via the protrusion by relative rotation of the disk.    DESCRIPTION OF DRAWING(S) - The figure shows the partial notch elevation of the ultra-fine-formation apparatus.    Ultra-fine-formation apparatus (1)    Ultra-fine-formation chamber (5)    Disks (11,12)    Support shaft (11A)    Protrusions (11C,12C)    Supplier (13)    To-be-processed fluid (W)