TY - JOUR
T1 - Recent advances in electro-fermentation technology: A novel approach towards balanced fermentation
AU - Sriram, Saranya
AU - Wong, Jonathan W C
AU - Pradhan, Nirakar
N1 - Funding Information:
This work was supported by the Hong Kong Baptist University with grant numbers: RC's start-up grant (Tier 1) and RC-OFSGT2/20-21/SCI/010.
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/9
Y1 - 2022/9
N2 - 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.
AB - 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.
KW - Acidogenic fermentation
KW - Electro-fermentation
KW - Electroactive bacteria
KW - Extracellular electron transfer
KW - Microbial electrosynthesis
UR - http://www.scopus.com/inward/record.url?scp=85135449512&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2022.127637
DO - 10.1016/j.biortech.2022.127637
M3 - Journal article
SN - 0960-8524
VL - 360
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 127637
ER -