Recent advances in electro-fermentation technology: A novel approach towards balanced fermentation

Saranya Sriram, Jonathan W C Wong, Nirakar Pradhan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Biotransformation of organic substrates via acidogenic fermentation (AF) to high-value products such as C1-C6 carboxylic acids and alcohol serves as platform chemicals for various industrial applications. However, the AF technology suffers from low product titers due to thermodynamic constraints. Recent studies suggest that augmenting AF redox potential can regulate the metabolic pathway and provide seamless electron flow by lowering the activation energy barrier, thus positively influencing the substrate utilization rate, product yield, and speciation. Hence, the augmented AF system with an exogenous electricity supply is termed as electro-fermentation (EF), which has enormous potential to strengthen the fermentation technology domain. Therefore, this critical review systematically discusses the current understanding of EF with a special focus on the extracellular electron transfer mechanism of electroactive bacteria and provides perspectives and research gaps to further improve the technology for green chemical synthesis, sustainable waste management, and circular bio-economy.

Original languageEnglish
Article number127637
Number of pages11
JournalBioresource Technology
Volume360
Early online date16 Jul 2022
DOIs
Publication statusPublished - Sep 2022

Scopus Subject Areas

  • Bioengineering
  • Waste Management and Disposal
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment

User-Defined Keywords

  • Acidogenic fermentation
  • Electro-fermentation
  • Electroactive bacteria
  • Extracellular electron transfer
  • Microbial electrosynthesis

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