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The review aims to explore the potential of microaerobic dark fermentation in purple non-sulfur bacteria for enhancing biohydrogen production.

Microaerobic dark fermentation by purple bacteria as an emerging perspective for biohydrogen production—a review

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The review aims to explore the potential of microaerobic dark fermentation in purple non-sulfur bacteria for enhancing biohydrogen production.
Review of existing literature on microbial dark fermentation and microaerobic processes.
Analysis of metabolic pathways in purple non-sulfur bacteria.
Examination of the model organism Rhodospirillum rubrum under microaerobic conditions.
High theoretical yields of biohydrogen (8-12 mol H2 mol−1 substrate) are suggested.
Current yields achieved are within the range of 0.2-1.6 mol H2 mol−1 substrate.
Microaerobic fermentation retains benefits of facultative aerobes like high cell densities and growth rates.

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The review highlights microaerobic dark fermentation's potential to enhance biohydrogen production efficiencies in purple bacteria.

Krake et al. (2026) studied this question.

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