TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: In the method: the carbon dioxide reforming process comprises the regeneration of a catalyst to produce the substrate of (a); the post fermentation substrate comprises at least one gas comprising carbon dioxide, methane, nitrogen and/or hydrogen; the post fermentation substrate is further treated by passing the post fermentation substrate through a membrane module configured to separate at least one gas from other gases, where hydrogen and carbon dioxide are separated from the post fermentation substrate by the membrane module; and a gas separation means receives a gaseous substrate from the bioreactor and/or the membrane module, and recovers hydrogen from the received gaseous substrate, where the gas separation means is a pressure swing adsorption module (6). Preferred Components: The carbon dioxide reforming module further comprises: a regenerator adapted to regenerate the catalyst by combustion of carboniferous deposits on the catalyst; a gasification module adapted to gasify a refinery feedstock to produce a syngas stream; a substitute natural gas (SNG) module adapted to receive at least a portion of the syngas and convert a portion of the syngas to SNG, where the C02 reformer is configured to receive at least a portion of the substitute natural gas. The bioreactor is adapted to receive the substrate produced by the carbon dioxide reformer and/or the syngas produced by the gasification module. The system comprises the membrane module configured to separate carbon dioxide and/or hydrogen from other gases in a gas stream exiting the bioreactor. The system further comprises a gas separation means for recovering hydrogen from the gaseous substrate comprising the syngas produced by the gasification module, the substrate produced by the carbon dioxide reformer, the gas stream exiting the bioreactor or the gas stream exiting the membrane module. The carbon dioxide reforming module is adapted to receive a gaseous substrate from one of the bioreactor, the membrane module or the pressure swing adsorption module. EXAMPLE - No suitable example given.