Reactor Designs and Configurations for Biological and Bioelectrochemical C1 Gas Conversion: A Review

Area of Science:

• Biotechnology
• Environmental Science
• Chemical Engineering

Background:

• Microbial C1 gas conversion offers a sustainable route for waste gas utilization (CO2, CO) into chemicals and fuels.
• Mass transfer limitations of poorly soluble C1 gases challenge process efficiency.
• Significant scientific interest has driven exploration of diverse reactor designs.

Purpose of the Study:

• To review various bioreactor designs used in microbial C1 conversion processes.
• To highlight advancements in converting waste gases into valuable products.
• To address challenges in microbial C1 gas utilization.

Main Methods:

• Exploration of reactor designs for syngas fermentation and hydrogenotrophic methanation.
• Evaluation of bioelectrochemical cells with biocathodes for CO2 sequestration and chemical generation.
• Investigation of microbial chain elongation for expanding product portfolios.

Main Results:

• Diverse bioreactor configurations have been developed to enhance microbial C1 gas conversion.
• Bioelectrochemical systems show potential for CO2 capture and valuable chemical synthesis.
• Microbial chain elongation broadens the range of products from C1 feedstocks.

Conclusions:

• Bioreactor design is crucial for overcoming mass transfer limitations in microbial C1 gas conversion.
• These technologies hold significant promise for sustainable chemical and fuel production.
• Further research into reactor optimization can enhance the efficiency and scope of C1 bioconversion.