Epitomizing biohydrogen production from microbes: Critical challenges vs opportunities.

Area of Science:

• Biotechnology and Renewable Energy
• Microbial Metabolism and Bioenergy

Background:

• Hydrogen is a clean, efficient, and non-toxic biofuel with significant future potential.
• Global interest in hydrogen economy implementation is growing, with various countries developing roadmaps.
• Microbial biohydrogen production offers a sustainable and environmentally friendly energy alternative.

Purpose of the Study:

• To review microbial biohydrogen production processes, including methods and influencing factors.
• To identify constraints hindering biohydrogen commercialization and explore potential solutions.
• To highlight opportunities for microalgae and biowastes in sustainable biohydrogen generation.

Main Methods:

• Review of existing literature on microbial biohydrogen production.
• Analysis of factors affecting biohydrogen yield (light, pH, temperature, nutrients).
• Investigation of strategies to overcome production limitations (genetic engineering, biomass pretreatment, nanoparticles, oxygen scavengers).

Main Results:

• Biohydrogen production via fermentative bacteria, photosynthetic bacteria, cyanobacteria, and microalgae is detailed.
• Optimum conditions for enhancing microbial biohydrogen yields are identified.
• Current biohydrogen yields are insufficient for market competitiveness, and commercialization faces obstacles.

Conclusions:

• Genetic engineering, biomass pretreatment, nanoparticles, and oxygen scavengers are key strategies to overcome biohydrogen production challenges.
• Microalgae and biowastes present significant opportunities for sustainable and economically viable biohydrogen production.
• Future research should focus on ensuring the sustainability and economic feasibility of biological hydrogen generation.