A method for operating a gas oxidation installation for the thermal treatment of a raw gas stream containing oxidisable constituents, comprising the following method steps: a) The raw gas stream is conducted through at least one first thermal storage mass (2, 3) of the gas oxidation installation, thermal energy stored in the thermal storage mass (2, 3) being transferred to the raw gas stream and heating same. b) In the gas oxidation installation, preferably in a combustion chamber of same, constituents of the raw gas stream are oxidised, and the raw gas stream is converted in this manner into a pure gas stream, the temperature of the formed pure gas stream being higher than the temperature of the previous raw gas stream. c) The pure gas stream is at least partially and/or intermittently - conducted through at least one second thermal storage mass (2, 3), thermal energy in the pure gas stream being transferred to the second thermal storage mass (2, 3) and heating same, and/or - conducted away by means of a bypass duct, the bypass duct preferably having a heat exchanger device, characterised by one of the following method steps: d) By means of the bypass duct, so much thermal energy is at least intermittently withdrawn from the gas oxidation installation that it is possible to maintain a minimum oxidation temperature in the gas oxidation installation, at which minimum oxidation temperature the oxidisable constituents of the raw gas stream oxidise substantially completely, within a corresponding period only by means of a supply of additional energy into the gas oxidation installation, wherein the bypass duct is left open during supply of the additional energy. or e) The bypass duct is opened during sub-autothermic operation of the gas oxidation installation. a) The raw gas stream is conducted through at least one first thermal storage mass (2, 3) of the gas oxidation installation, thermal energy stored in the thermal storage mass (2, 3) being transferred to the raw gas stream and heating same. b) In the gas oxidation installation, preferably in a combustion chamber of same, constituents of the raw gas stream are oxidised, and the raw gas stream is converted in this manner into a pure gas stream, the temperature of the formed pure gas stream being higher than the temperature of the previous raw gas stream. c) The pure gas stream is at least partially and/or intermittently - conducted through at least one second thermal storage mass (2, 3), thermal energy in the pure gas stream being transferred to the second thermal storage mass (2, 3) and heating same, and/or - conducted away by means of a bypass duct, the bypass duct preferably having a heat exchanger device, - conducted through at least one second thermal storage mass (2, 3), thermal energy in the pure gas stream being transferred to the second thermal storage mass (2, 3) and heating same, and/or - conducted away by means of a bypass duct, the bypass duct preferably having a heat exchanger device, d) By means of the bypass duct, so much thermal energy is at least intermittently withdrawn from the gas oxidation installation that it is possible to maintain a minimum oxidation temperature in the gas oxidation installation, at which minimum oxidation temperature the oxidisable constituents of the raw gas stream oxidise substantially completely, within a corresponding period only by means of a supply of additional energy into the gas oxidation installation, wherein the bypass duct is left open during supply of the additional energy. or e) The bypass duct is opened during sub-autothermic operation of the gas oxidation installation.