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Waste Water Derived Electroactive Microbial Biofilms: Growth, Maintenance, and Basic Characterization
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Recent developments and key barriers to microbial CO2 electrobiorefinery.

Soo Youn Lee1, You-Kwan Oh2, Sangmin Lee1

  • 1Gwangju Bio/Energy R&D Center, Korea Institute of Energy Research, Gwangju 61003, Republic of Korea.

Bioresource Technology
|November 13, 2020
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Summary

Microbial CO2 electrobiorefineries use microbial electrosynthesis (MES) to convert CO2 into valuable chemicals and biofuels, storing renewable energy. This review explores recent advances and strategies to overcome MES limitations for efficient CO2 utilization.

Keywords:
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Area of Science:

  • Biotechnology
  • Electrochemistry
  • Environmental Science

Background:

  • Electrochemical conversion of carbon dioxide (CO2) offers a pathway for renewable energy storage and CO2 utilization.
  • Microbial electrosynthesis (MES) integrates electrochemical and microbial processes within a CO2 electrobiorefinery concept.
  • MES aims to produce biofuels and higher-value chemicals by merging CO2 fixation and electricity utilization.

Purpose of the Study:

  • To review recent developments in bioelectrochemical CO2 conversion using MES.
  • To discuss technical approaches for overcoming current limitations in MES.
  • To present strategies for optimizing CO2 electrobiorefineries.

Main Methods:

  • Review of recent literature on microbial CO2 electrobiorefineries and MES.
  • Analysis of advancements in biocathode engineering and electron mediator application.
  • Examination of reactor optimization strategies and integration of inorganic catalysts.

Main Results:

  • Recent progress in microbial CO2 fixation and electricity utilization via MES is discussed.
  • Technical strategies including biocathode engineering, electron mediators, and reactor optimization are evaluated.
  • Integration of biocathodes with inorganic catalysts and metabolic engineering are highlighted as key approaches.

Conclusions:

  • MES presents a promising route for CO2 utilization and renewable energy storage.
  • Further research in biocathode development, microbial screening, and metabolic engineering is crucial for advancing CO2 electrobiorefineries.
  • Optimizing reactor design and integrating novel catalysts can enhance the efficiency and productivity of these systems.