Hydrogen production from macroalgae by simultaneous dark fermentation and microbial electrolysis cell.

Area of Science:

• Biotechnology
• Renewable Energy
• Environmental Science

Background:

• Hydrogen is a key clean energy carrier.
• Efficient hydrogen production from biomass remains a challenge.
• Algal biomass, like Saccharina Japonica, offers a sustainable feedstock.

Purpose of the Study:

• To investigate the efficacy of a novel simultaneous dark fermentation and microbial electrolysis cell (sDFMEC) process for hydrogen production.
• To compare the hydrogen yield of sDFMEC with conventional dark fermentation (DF) and a series configuration of DF and MEC (DF-MEC).

Main Methods:

• Developed and tested a novel sDFMEC reactor configuration.
• Utilized Saccharina Japonica as the substrate.
• Measured hydrogen production rates and yields under different process conditions.
• Compared sDFMEC performance against DF and DF-MEC systems.

Main Results:

• The sDFMEC process achieved a significantly higher hydrogen production of 438.7 ± 13.3 mL/g-TS.
• This yield is substantially greater than DF (54.6 ± 0.8 mL/g-TS) and DF-MEC (403.5 ± 7.9 mL/g-TS) processes.
• The sDFMEC hydrogen yield was approximately three times higher than previously reported values in the literature.

Conclusions:

• The sDFMEC process represents a highly efficient method for hydrogen production from Saccharina Japonica.
• Simultaneous dark fermentation and microbial electrolysis offer synergistic benefits for maximizing hydrogen generation.
• This approach holds promise for sustainable and cost-effective biohydrogen production.