A system for plasma treatment of solid waste, including: - a device for plasma treatment of solid waste comprising: - a casing defining a treatment volume; - a plasma torch including a first electrode and a second electrode, which face into said treatment volume; - an inlet port (W_IN) for the inlet of solid waste to be treated; - an outlet port (W_OUT) for the disposal of inert solid products of reaction; - a supply port (G_IN) for intake of a supply gas for said plasma torch; and - a discharge port (G_OUT) for discharge of gaseous products of reaction, wherein said first and second electrodes (16, 18) are set opposed to one another; and wherein said casing is mounted rotatable about an axis of rotation; the system further including: - a feeding device for solid waste configured for feeding shredded waste to said inlet port (W_IN) of said treatment device; - a re-circulation duct for gaseous products of reaction in communication with said supply port (G_IN) of said plasma torch; and - an after-treatment assembly including a trap for particulate matter configured for receiving gaseous products of reaction from said discharge port (G_OUT) of said device, and a thermal-recovery system configured for receiving and carrying out energy exploitation of the gaseous products of reaction that are not intended for re-circulation to the supply port (G_IN) of said plasma torch. - a device for plasma treatment of solid waste comprising: - a casing defining a treatment volume; - a plasma torch including a first electrode and a second electrode, which face into said treatment volume; - an inlet port (W_IN) for the inlet of solid waste to be treated; - an outlet port (W_OUT) for the disposal of inert solid products of reaction; - a supply port (G_IN) for intake of a supply gas for said plasma torch; and - a discharge port (G_OUT) for discharge of gaseous products of reaction, wherein said first and second electrodes (16, 18) are set opposed to one another; and wherein said casing is mounted rotatable about an axis of rotation; the system further including: - a feeding device for solid waste configured for feeding shredded waste to said inlet port (W_IN) of said treatment device; - a re-circulation duct for gaseous products of reaction in communication with said supply port (G_IN) of said plasma torch; and - an after-treatment assembly including a trap for particulate matter configured for receiving gaseous products of reaction from said discharge port (G_OUT) of said device, and a thermal-recovery system configured for receiving and carrying out energy exploitation of the gaseous products of reaction that are not intended for re-circulation to the supply port (G_IN) of said plasma torch. - a casing defining a treatment volume; - a plasma torch including a first electrode and a second electrode, which face into said treatment volume; - an inlet port (W_IN) for the inlet of solid waste to be treated; - an outlet port (W_OUT) for the disposal of inert solid products of reaction; - a supply port (G_IN) for intake of a supply gas for said plasma torch; and - a discharge port (G_OUT) for discharge of gaseous products of reaction, - a feeding device for solid waste configured for feeding shredded waste to said inlet port (W_IN) of said treatment device; - a re-circulation duct for gaseous products of reaction in communication with said supply port (G_IN) of said plasma torch; and - an after-treatment assembly including a trap for particulate matter configured for receiving gaseous products of reaction from said discharge port (G_OUT) of said device, and a thermal-recovery system configured for receiving and carrying out energy exploitation of the gaseous products of reaction that are not intended for re-circulation to the supply port (G_IN) of said plasma torch.