The present invention relates to a high-speed continuous mixing apparatus comprising: a motor stage (3), an intermediate stage (4) and a final stage (5) arranged in alignment with each other; a mixing chamber (25) in the final stage (5); a mixing shaft (7) rotating with respect to the mixing chamber (25) and provided with radial pins (9); an electric motor (6) in the motor stage (3) for driving the mixing shaft (7) in rotation; a coupling joint or fitting (27) between the electric motor (6) and the mixing shaft (7) in the intermediate stage and a pair of rolling bearings (2, 21) for the support of said mixing shaft (7) in said intermediate stage (4). This configuration allows a direct coupling between motor and mixing shaft without using an intermediate reducer.

Disclosed are magnetic agitation mixing systems for use with flexible container reaction vessels. In one aspect of the invention, the orientation of magnetic coupling between the impeller magnets and the external driver magnets is modified such that the coupling is neither strictly axial nor strictly radial. Also disclosed are receiver-less retainer configurations whereby the single-use container need not have a rigid base that defines a cup or post to engage of rotatable agitator.

A waste treatment apparatus includes: a body having a spherical shape and configured to accommodate a waste therein; and a stirring unit configured to stir the waste accommodated in the body. The stirring unit includes: a main shaft horizontally and rotatably disposed at a center portion in the inside of the body; a plurality of main shaft stirring blades having a flat plate shape, the plurality of main shaft stirring blades mounted on a surface of the main shaft; a plurality of support rods assembled to the main shaft at a predetermined interval, the plurality of support rods extending perpendicularly toward an inner peripheral surface of the body; and a plurality of stirring blades each having a rectangular flat plate shape, the plurality of stirring blades being mounted on distal ends of the plurality of support rods on an inner peripheral surface side of the body.