NOVELTY - The loop reactor for treating bio wastes/regenerating raw material, comprises a guiding device arranged in the interior of the reactor for circulation of reactor contents, a central gas supply mechanism and gas distribution mechanisms (2) for entering gas into the guiding device. The gas distribution mechanisms are formed as downward open gas guidance elements, which are arranged above gas outlets (3) of the central gas supply mechanism. The gas supply mechanism is formed as vertical feeding pipe (1), which passes below the fluid level in the loop reactor.    USE - For the treatment of bio wastes/regenerating raw material.    ADVANTAGE - The loop reactor is cost effective, reliable, high flexibility and ensures efficient gas distribution.    DETAILED DESCRIPTION - The loop reactor for treating bio wastes/regenerating raw material, comprises a guiding device arranged in the interior of the reactor for circulating reactor contents, a central gas supply mechanism and gas distribution mechanisms (2) for entering gas into the guiding device. The gas distribution mechanisms are formed as downward open gas guidance elements, which are arranged above gas outlets (3) of the central gas supply mechanism. The gas supply mechanism is formed as vertical feeding pipe (1), which passes below the fluid level in the loop reactor. The gas guidance elements are formed as semicircularly bent sheet metal on the lower surface and are mounted on outside of the feeding pipe and are bent upward at 5-45degrees. In the loop reactor, three to seven gas guidance elements are distributed at height of the gas outlets. The gas guidance elements exhibit lateral guidance surfaces (10), which are extended downwardly to the gas outlets in the area of the central gas supply mechanism. The loop reactor is formed as biogas reactor.    DESCRIPTION OF DRAWING(S) - The drawing shows a gas entry system for a loop reactor:    Feeding pipe; (1)    Gas distribution mechanisms; (2)    Gas outlets; (3)    Guiding section; (4)    Lateral guidance surfaces. (10)