Comparative bibliometric analysis of biohydrogen and biomethane production from anaerobic fermentation of brewery byproducts

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Comparative analysis shows biomethane production is more frequent than biohydrogen, indicating varying research themes for both.

Biomethane production has been studied more often than biohydrogen, driven by its higher energy efficiency and established infrastructure.
The analysis found 45 articles on biohydrogen and 78 on biomethane published between 2014 and 2023, reflecting a growing interest in waste management.
Key themes in biohydrogen include the 'biorefinery concept', while biomethane focuses on 'pretreatment' and 'microbial community'.
The study highlights a lack of environmental assessment and technoeconomic analysis for both biohydrogen and biomethane from brewery byproducts.

Sganzerla et al. (2025) studied this question.

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