NOVELTY - A process and plant for the preparation and treating communal and industrial wastes into usable products include a pre-preparation auxiliary plant and a treatment plant.    USE - The invention is used for the preparation and treating of communal and industrial wastes into usable products. The resulting solidificate can also be used in building purposes, power production and as a special protecting material at building barriers against influences by noxious, toxic and radioactive materials.    ADVANTAGE - The materials (solidificate) obtained have better properties than other presently known and similar materials, by its characteristics such as ecological impact, resistance to natural effects, economy in obtaining and application, simplicity of further use, and etc. The products that leave the plant are dry, hydrophobic and usable solidificate and water steam with no noxious content. The waste treatment process utilizes no external heat energy or drinking water and produces no technological water and runs continuously with final solidificate and water steam of uniform quality.    DETAILED DESCRIPTION - The process and plant for the preparation and treating of communal and industrial wastes into usable products has (i) pre-preparation auxiliary plant consists of intake hopper (33), motor-variator (34), material fragmentation, loosening (35) and transportation line (36); and (ii) a treatment plant consists of basic and additive material holds, grills (1) and dosers (5, 6), vortex units (3), reactor lines (15, 17) with powering motors (16, 18), vacuum-gas encapsulation motor (20), belt conveyor (26) for transportation of the final solidificate to containers, and filtering system for water steam purification.    DESCRIPTION OF DRAWING(S) - The figures show a vertical cross-section, and a block-diagram of the plant and a diagram of auxiliary facility.    Grills (1)    Vortex units (3)    Dosers (5, 6)    Reactor lines (15, 17)    Motors (16, 18)    Vacuum-gas encapsulator (20)    Belt conveyor (26)    Intake hopper (33)    Motor-variator (34)    Loosening line (35)    Transportation line (36)