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The hydrogen obtained through biological processes, using anaerobic or photosynthetic bacteria, is called biohydrogen and is considered to be the energy of future. In the presence of light, the photosynthetic bacteria are able to use organic compounds as carbon source while liberating hydrogen. The aim of our research is to study the photoheterotroph fermentation process and to optimize the parameters to obtain higher conversion rate.

Keywords: biohydrogen, photoheterotroph fermentation, organic acid, photo­reactor, kinetic model