A system for producing aliphatic alcohols, comprising: - at least one first device for the biological production of ethanol, wherein carbon dioxide is formed, and - at least one second device for chemically reacting the carbon dioxide by means of chemical synthesis in a Fischer-Tropsch synthesis method, which is an exothermic "Aufbaureaktion" of CO/H 2 mixtures on heterogeneous catalysts for forming paraffins, alkenes, and alcohols, wherein the second device for chemical synthesis in a Fischer-Tropsch synthesis method is arranged downstream of the first device for the biological production of ethanol, and a first connection from the first device to the second device via which it is possible to pass the carbon dioxide formed in the first device into the second device, wherein - the system includes a second connection from the second device to the first device via which it water formed in the second device can be passed into the first device and used to create a mash, - at least one device for producing steam and a third connection, wherein the third connection is disposed between the steam production device and the first device via which it is possible for the steam formed in the steam production device to be passed into the first device, - at least one third device for generating hydrogen, which includes a fifth connection to the second device, and via which it is possible to introduce the hydrogen into the second device, wherein the third device is designed to generate hydrogen and oxygen from water, wherein the device is designed to generate compressed hydrogen and oxygen with a pressure of > 15 bar, - the system includes a fourth connection from the first device to the steam production device, via which it is possible to pass a condensate formed in the first device into the steam production device, - the third device supplied the second device with compressed hydrogen under pressure of > 15 bar - the system comprises a fourth device which is designed to hold a reserve of thermal energy, and which is connected to the production system for ethanol in such manner that the the generated steam is used to contribute thermal energy for production of the ethanol in the first device. - at least one first device for the biological production of ethanol, wherein carbon dioxide is formed, and - at least one second device for chemically reacting the carbon dioxide by means of chemical synthesis in a Fischer-Tropsch synthesis method, which is an exothermic "Aufbaureaktion" of CO/H 2 mixtures on heterogeneous catalysts for forming paraffins, alkenes, and alcohols, - the system includes a second connection from the second device to the first device via which it water formed in the second device can be passed into the first device and used to create a mash, - at least one device for producing steam and a third connection, wherein the third connection is disposed between the steam production device and the first device via which it is possible for the steam formed in the steam production device to be passed into the first device, - at least one third device for generating hydrogen, which includes a fifth connection to the second device, and via which it is possible to introduce the hydrogen into the second device, wherein the third device is designed to generate hydrogen and oxygen from water, wherein the device is designed to generate compressed hydrogen and oxygen with a pressure of > 15 bar, - the system includes a fourth connection from the first device to the steam production device, via which it is possible to pass a condensate formed in the first device into the steam production device, - the third device supplied the second device with compressed hydrogen under pressure of > 15 bar - the system comprises a fourth device which is designed to hold a reserve of thermal energy, and which is connected to the production system for ethanol in such manner that the the generated steam is used to contribute thermal energy for production of the ethanol in the first device.