NOVELTY - Powdered waste material is fed to a microwave drum reactor and pyrolyzed by microwaves while moving through the reactor at 800-950 degrees C, to obtain end products comprising gases, dust and porous char of large surface area and having absorptive properties. The char is separated from other pyrolysis products by deposition and then a portion of the obtained char is added to a filter. The dust and gases are supplied to a gas cooling apparatus comprising at least two synchronized screw conveyors, and gases are cooled to temperature of 120-160 degrees C.    USE - Processing of plastic and/or rubber waste for generating energetic gas comprising aliphatic hydrocarbon, carbon oxide and hydrogen.    ADVANTAGE - The method efficiently and economically processes plastic and/or rubber waste by generating reduced amount of soot.    DETAILED DESCRIPTION - Powdered waste material is fed to a microwave drum reactor and pyrolyzed by microwaves while moving through the reactor at 800-950 degrees C, to obtain end products comprising gases, dust and a porous char of large surface area and having absorptive properties. The char is separated from other pyrolysis products by deposition and then a portion of the obtained char is added to a filter. The dust and gases are supplied to a gas cooling apparatus comprising at least two synchronized screw conveyors, and gases are cooled to temperature of 120-160 degrees C. The dust and the condensate are directed to the filter filled with the char and the mixture of char, condensate and dust is sent back from the filter to the microwave reactor. The waste optionally contains halogen, sulfur, nitrogen and oxygen and contaminated by inorganic substances comprising ceramic and metallic material. An INDEPENDENT CLAIM is included for system for processing plastic and/or rubber waste, which comprises an apparatus for crushing the waste material, a microwave drum reactor for processing the crushed waste material, having a ceramic lining and microwave radiant heaters and connected to a solid products tank and to a gas cooling apparatus comprising a system for absorbing condensing substances, a gas-cooling apparatus connected with a filter filled with char and with a gas purifying system connected with a charcoal filter connected with a gas tank, screw conveyor (208) for transporting the condensate and a tank (209) with char to collect the condensate, where the tank with the char is connected to the microwave reactor to feed back the char to the microwave reactor. The gas-cooling apparatus comprises a heat exchanger having inlet and outlet coolant stub pipes (206, 207) for cooling a chamber (201), inlet and outlet stub pipes (203) for providing a mixture of gases and dust to the chamber in which there are mounted at least two screw conveyors (202) operating synchronously to transport the mixture of dust and gases and condensate, driven by a motor (205).    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic structure of gas-cooling apparatus.    Chamber (201)    Screw conveyors (202,208)    Gas and dust output stub pipe (203)    Motor (205)    Coolant input and outlet stub pipes (206,207)    Char tank (209)