Journal
BIORESOURCES AND BIOPROCESSING
Volume 9, Issue 1, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1186/s40643-022-00504-8
Keywords
Biohydrogen microbiomes; Biohydrogen production; Dark fermentation; Palm oil mill effluent; Industrial wastes; Molecular biology tools
Categories
Funding
- Ministry of Higher Education (MOHE) Malaysia
- Nigerian Tertiary Education Trust
- UTM via Transdisciplinary Research Grant [05G24]
- UTM via UTMShine Grant [09G86]
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Biohydrogen production through dark fermentation is an attractive solution for mitigating the effects of climate change. Understanding the microbial communities involved in the fermentation process and their interactions is crucial for process optimization. This review discusses the different systems and microbiomes used in dark fermentation, with a focus on palm oil mill effluent. The challenges and molecular biology tools used to study the microbial ecology associated with biohydrogen production are also summarized. The future outlook highlights the potential of microbiome-based technologies in maximizing biohydrogen production output.
Biohydrogen production through dark fermentation is very attractive as a solution to help mitigate the effects of climate change, via cleaner bioenergy production. Dark fermentation is a process where organic substrates are converted into bioenergy, driven by a complex community of microorganisms of different functional guilds. Understanding of the microbiomes underpinning the fermentation of organic matter and conversion to hydrogen, and the interactions among various distinct trophic groups during the process, is critical in order to assist in the process optimisations. Research in biohydrogen production via dark fermentation is currently advancing rapidly, and various microbiology and molecular biology tools have been used to investigate the microbiomes. We reviewed here the different systems used and the production capacity, together with the diversity of the microbiomes used in the dark fermentation of industrial wastes, with a special emphasis on palm oil mill effluent (POME). The current challenges associated with biohydrogen production were also included. Then, we summarised and discussed the different molecular biology tools employed to investigate the intricacy of the microbial ecology associated with biohydrogen production. Finally, we included a section on the future outlook of how microbiome-based technologies and knowledge can be used effectively in biohydrogen production systems, in order to maximise the production output.
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