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- W4386314978 abstract "As the energy crisis has been getting increasingly serious in recent years, the research on biohydrogen (bioH2) production as a renewable energy source has been a high-demanding subject. It aims to reduce the pressures set by CO2 emissions and the depletion of fossil fuel supplies. Though bioH2 science is still at the beginning, there have been a lot of reported works on lab and pilot-scale systems with promising futures. This paper presents various potential methods of bioH2 production using biomass resources and comparatively assesses them for environmental impacts with a special emphasis on biological processes. The environmental impact factors are then normalized with the feature scaling normalization methods to evaluate the environmental sustainability of each bioH2 production method. Results revealed that the photofermentation (PF) process was more environmentally sustainable than the other investigated biological and thermochemical processes, particularly regarding emissions, water-fossil-mineral uses, and health issues. The global warming potential (GWP) and acidification potential (AP) for the PF process are 1.88 kg-CO2 eq. and 3.61 g-SO2 eq., which are the lowest among all processes, including renewable energy-based H2 production processes. However, the dark fermentation-microbial electrolysis cell (DF-MEC) hybrid process is considered the most environmentally harmful technique, with the highest GWP value of 14.6 kg-CO2 eq. due to their superior electricity and heat requirements. The water conception potential (WCP) of 84.5 m3 and water scarcity footprint (WSF) of 3632.9 m3 for the DF-MEC process is also the highest compared to all other processes due to the huge amount of wastewater formation potential of the system. Overall rankings confirmed that biological processes are primarily promising candidates to produce bioH2 from an environmentally friendly point of view." @default.
- W4386314978 created "2023-09-01" @default.
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- W4386314978 date "2023-12-01" @default.
- W4386314978 modified "2023-10-09" @default.
- W4386314978 title "Comparative environmental sustainability assessment of biohydrogen production methods" @default.
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- W4386314978 doi "https://doi.org/10.1016/j.scitotenv.2023.166613" @default.
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