NOVELTY - The production of methane gas from mediums containing organic substrates, comprises forcing the biogas into peripheral points of two-component gas reactors over a gas distribution line with gas shutoff device, supplying the displaced fermenting substrate along moistened conducting surfaces to the gas distribution line and supplying the streaming biogas over a nutrient carrier bath (14) and a beam grid material (16) into a gas collector (28). The gas distribution line shows connections, in which gas regulating valves are inserted. The reactors are connected with one another over pipelines.    USE - For production of methane gas from mediums containing organic substrates.    ADVANTAGE - The procedure highly increases the efficiency of the production of methane gas and ensures reduced maintenance costs as well as low energy expenditure for the methane production.    DETAILED DESCRIPTION - The production of methane gas from mediums containing organic substrates, comprises forcing the biogas into peripheral points of a gas reactors over a gas distribution line with gas shutoff device, supplying the displaced fermenting substrate along moistened conducting surfaces to the gas distribution line and supplying the streaming biogas over a nutrient carrier bath and a beam grid material into a gas collector. The gas distribution line exhibits connections, in which gas regulating valves are inserted. The gas regulating valves and the shutoff device are controlled with respect to the pressure built up in the gas reactors. The beam grid materials are incorporated directly above the nutrient carrier bath in such a manner that a constant moistening of the growth surfaces is effected by the splash resulting from the gas forced into the nutrient carrier bath. The beam grid materials are additionally moistened by a separate mechanical sprinkling system. The gas collector is closed by a gas-lock, which freely floats in a water cup and which is stabilized by flotation chambers. The stabilization of gas lock takes place by leading stabilization ropes over guide rollers to a common fastening point at the suspended stabilization weight. The gas lock floats in the nutrient carrier bath. The gas reactors are connected with one another over pipelines and have inlet- and outlet-port.    DESCRIPTION OF DRAWING(S) - The figure shows a gas reactors for the production of methane gas:    Nutrient carrier bath; (14)    Beam grid material; (16)    Gas lock; (23)    Water cup; (27)    Gas collector. (28)