NOVELTY - A device for oxidation of methane in residual gas from a waste dump comprises waste dump degassing well (1) and biofilter (3), where the well (1) is connected with biofilter by pipe (2) having a diameter equal to the diameter of the well, which is connected with at least one pipe (2a), located in a distance of around 50 cm, passing above the bottom of the biofilter, tangent to its horizontal section and having holes (40) along its entire bottom length, located in such way, that the whole segment of the pipe located inside the biofilter is divided into five equal segments.    USE - As device for oxidation of methane in residual gas from waste dump (claimed).    ADVANTAGE - The device allows uniform flow of waste dump gas in the entire section of the biofilter, which is especially important when there is a big difference between the section of the pipe delivering the waste dump gas and the section of biofilter. The waste dump gas present in the biofilter in the space beneath the grate attains constant overpressure, the same as that in the degassing well, which ensures its uniform inflow to the entire surface of the layers in the biofilter.    DETAILED DESCRIPTION - A device for oxidation of methane in residual gas from a waste dump comprises waste dump degassing well and biofilter where the well (1) with waste dump gas is connected with biofilter (3) by pipe (2) having a diameter equal to the diameter of the well (1), which is connected with at least one pipe (2a), preferably several located in a distance of around 50 cm one from another, passing above the bottom of the biofilter, tangent to its horizontal section and having from down, along its entire length, holes (4), located in such way, that the whole segment of the pipe located inside the biofilter is divided into five equal segments, the length of each being equal to 20% of the length of the pipe, and in the consecutive segments holes are made in the following order on certain segment, starting from waste dump gas inlet, there is one row of holes, on the second segment there are two rows, on the third segment there are three rows, on the forth-four rows and on the fifth segment there five rows having a section area so selected, that the total area of the section of all holes is equal to the internal area of the pipe and above the pipe, in the biofilter there is a grate (5) made of net with mesh diameter of 0,5 cm and on the grate there is layer (6) 5-15 (preferably 10 cm) thick, of keramsite having a granularity of 0,6-1,2 cm, and above the keramsite layer (6) there is 50-80 (preferably 70) cm high layer of organic material, preferably layer of compost (7), in which layer methane oxidising bacteria can develop.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of device for oxidation of methane in residual gas.    well (1)    Pipe (2)    Biofilter (3)    Holes (4)    Grate (5)    Keramsite layer (6)