Department of Chemistry, Centre for Alternate and Renewable Energy Research, R&D, University of Petroleum & Energy Studies (UPES), School of Engineering, Energy Acres Building, Bidholi, Dehradun 248007, Uttarakhand, India.
Department of Chemical Engineering, National Institute of Technology Calicut, Kozhikode 673601, Kerala, India.
Bioresour Technol. 2021 Dec;342:126057. doi: 10.1016/j.biortech.2021.126057. Epub 2021 Sep 28.
Biohydrogen (BioH) is considered as one of the most environmentally friendly fuels and a strong candidate to meet the future demand for a sustainable source of energy. Presently, the production of BioH from photosynthetic organisms has raised a lot of hopes in the fuel industry. Moreover, microalgal-based BioH synthesis not only helps to combat current global warming by capturing greenhouse gases but also plays a key role in wastewater treatment. Hence, this manuscript provides a state-of-the-art review of the upstream and downstream BioH production processes. Different metabolic routes such as direct and indirect photolysis, dark fermentation, photofermentation, and microbial electrolysis are covered in detail. Upstream processes (e.g. growth techniques, growth media) also have a great impact on BioH productivity and economics, which is also explored. Technical and scientific obstacles of microalgae BioH systems are finally addressed, allowing the technology to become more innovative and commercial.
生物氢（BioH）被认为是最环保的燃料之一，也是满足未来可持续能源需求的有力候选者。目前，从光合生物中生产 BioH 在燃料工业中引起了广泛关注。此外，基于微藻的 BioH 合成不仅有助于通过捕获温室气体来应对当前的全球变暖，而且在废水处理中也起着关键作用。因此，本文对 BioH 的上下游生产工艺进行了综述。详细介绍了不同的代谢途径，如直接和间接光解、暗发酵、光发酵和微生物电解。上游工艺（例如生长技术、生长培养基）对 BioH 的生产力和经济性也有重大影响，这也进行了探讨。最后，解决了微藻 BioH 系统的技术和科学障碍，使该技术更具创新性和商业性。
