Читать книгу Energy - Группа авторов - Страница 78

This is a biological way of producing hydrogen via microorganisms which are normally present in aqueous atmosphere at normal temperature and pressure conditions (Kotay and Das 2008). Last two decades have seen tremendous input at R&D level to advance various technologies needed in this process to make these methods economically viable. This process consumes bio‐wastes and offers an interesting path for their minimization along with energy generation. Energy from this process can be harnessed locally due to availability of primary resources on which microorganisms will act upon, thus making possible production of distributed hydrogen. Bio‐hydrogen generation processes have further categories, namely direct bio‐photolysis, indirect bio‐photolysis, photo fermentation, dark fermentation and bio‐catalysed electrolysis (Pareek et al. 2020). All these methods need further advances due to their poor hydrogen conversion efficiency and high cost, at present.