Abstract

This article covers the critical importance and novel aspects of biogas (BioG) and biohydrogen (BioH2) in the realm of renewable energy and environmental sustainability. BioH2, a low-carbon fuel renowned for its high energy efficiency, is contrasted with BioG, derived from organic waste, which not only minimizes landfill use and methane emissions but also yields environmentally benign compost. Emphasizing the significance of feedstock composition and digestion management, the essay explores the production of BioG from agricultural and urban waste. The challenges associated with synthesizing BioH2 using dark and photolysis processes, such as efficiency and substrate availability, are discussed alongside the sustainable integration of BioH2 production into wastewater treatment paradigms. Unlike fossil fuels, both BioG and BioH2 significantly reduce greenhouse gas emissions. Comprehensive life cycle studies are cited to underscore the environmental impact of these biofuels, emphasizing the ethical procurement of materials and operational efficiency. The essay concludes that advancements in waste management, feedstock selection, and manufacturing practices are imperative for the proliferation of these renewable energy sources in the fight against climate change and the establishment of a sustainable energy infrastructure. © 2024 The Institution of Chemical Engineers