Implemented is an apparatus and a process for complete treatment of slurry and powder. The apparatus includes a rotatable lower bowl assembly, a rotatable upper bowl assembly adapted to be assembled with the lower bowl assembly, a drive including at least a geared motor, connected with each of the lower bowl assembly and the upper bowl assembly. A main frame assembly movably mounts the lower bowl assembly and the upper bowl assembly. The lower bowl assembly and the upper bowl assembly are assembled together to form a spherical bowl assembly in a vertical orientation, on the main frame assembly. The spherical bowl assembly receives the slurry for treatment, processes the slurry into a dried product after treatment, and safely discharges the dried product out of the spherical bowl assembly.