Biohydrogen is hydrogen produced via biological processes or from biomass. Hydrogen (ˈhaɪdrədʒən is the Chemical element with Atomic number 1 A biological process is a process of a living Organism (either plant or animal Biomass refers to living and recently dead Biological material that can be used as fuel or for industrial production
Biohydrogen plants are proposed industrial plants for the production of hydrogen. For other uses of this term see Industry (disambiguation An industry (from Latin industrius, "diligent industrious" They would typically involve processes such as thermophillic fermentation, photofermentation and gas cleaning. A thermophile is an organism &mdash a type of Extremophile &mdash which thrives at relatively high temperatures between 45 and 80 °C (113 and 176 °F Fermentation is the process of deriving energy from the oxidation of organic compounds such as carbohydrates using an endogenous electron acceptor which is  Biohydrogen production can also involve an element of anaerobic digestion where the methane from biogas is converted through steam reforming into hydrogen. Anaerobic digestion is a series of processes in which Microorganisms break down Biodegradable material in the absence of Oxygen. Methane is a Chemical compound with the molecular formula. It is the simplest Alkane, and the principal component of Natural gas. See also Natural gas, Biofuel Biogas typically refers to a Gas produced by the biological breakdown of Organic matter in the Steam reforming (SR hydrogen reforming or catalytic oxidation, is a method of producing Hydrogen from Hydrocarbons. 
Hydrogen can be produced by bacterial species such as Rhodobacter sphaeroides and Enterobacter cloacae. The Rhodobacteraceae are a family of Proteobacteria, given their own order within the alpha subgroup Enterobacter is a genus of common Gram-negative, facultatively-anaerobic, rod-shaped Bacteria of the family Enterobacteriaceae . Biohydrogen can be produced through dark fermentation either by mix culture of hydrogen producing sludge or pure culture of anaerobic bacteria such as Clostridium butyricum.
Proton exchange membrane fuel cells (PEMFC) are the essential technology that made possible the conversion of the energy content in biohydrogen to electricity. Proton exchange membrane fuel cells, also known as Proton exchange membrane (PEM fuel cells (PEMFC are a type of Fuel cell being developed for transport Biohydrogen produced from organic waste materials is a promising alternatives for a sustainable energy sources.
See also Natural gas, Biofuel Biogas typically refers to a Gas produced by the biological breakdown of Organic matter in the Biological hydrogen production is done in a Bioreactor based on the production of hydrogen by Algae. Biomass refers to living and recently dead Biological material that can be used as fuel or for industrial production A microbial fuel cell ( MFC) or biological fuel cell is a bio- Electrochemical system that drives a current by mimicking Bacterial interactions