NOVELTY - The method for treating fermentation residues (2) from biogas plant, comprises storing the fermentation residues in storage containers (1), connecting together methane-containing gas spaces of the storage container over gas lines, circulating the gas continuously in a circulating flow (4), supplying air to the circulating flow and deriving a part of the circulating flow and then subjecting to combustion (7). The methane concentration is permanently monitored in the circulating flow and is kept in the circulating flow through circulation and air supply of less than 2-3 vol.%.    USE - Method for treating fermentation residues from biogas plant useful for energy production.    ADVANTAGE - The method ensures economical treatment of fermentation residues.    DETAILED DESCRIPTION - The method for treating fermentation residues (2) from biogas plant, comprises storing the fermentation residues in storage containers (1), connecting together methane-containing gas spaces of the storage container over gas lines, circulating the gas continuously in a circulating flow (4), supplying air to the circulating flow and deriving a part of the circulating flow and then subjecting to combustion (7). The methane concentration is permanently monitored in the circulating flow and is kept in the circulating flow through circulation and air supply of less than 2-3 vol.%. The number of storage container is greater than or equal to 2. The storage containers dispose over gas storage roofs (3) with gas-impermeable membranes for receiving variable amount of gas. The storage containers stand in connection with separate gas storage and dispose over pressure relief device. The combustion of the methane from a part of the circulating flow serves the energy generation. The gases are circulated in the circulating flow of 500-2000 m3/h, are conducted from the circulating flow of 500-700 m3/h and are introduced to the combustion. The air is introduced in to the circulating flow of 500-700 m3/h. An INDEPENDENT CLAIM is included for a device for treating fermentation residues from biogas plant.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of a method for treating fermentation residues from biogas plants.    Storage containers (1)    Fermentation residues (2)    Gas storage roofs (3)    Circulating flow (4)    Combustion. (7)