Valorization of volatile fatty acids from the dark fermentation waste Streams-A promising pathway for a biorefinery concept

TY - JOUR

T1 - Valorization of volatile fatty acids from the dark fermentation waste Streams-A promising pathway for a biorefinery concept

AU - Sekoai, Patrick T.

AU - Ghimire, Anish

AU - Ezeokoli, Obinna T.

AU - Rao, Subramanya

AU - Ngan, Wing Y.

AU - Habimana, Olivier

AU - Yao, Yuan

AU - Yang, Pu

AU - Yiu Fung, Aster Hei

AU - Yoro, Kelvin O.

AU - Daramola, Michael O.

AU - Hung, Chun Hsiung

N1 - Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/6

Y1 - 2021/6

N2 - In recent years, much attention has been directed towards the integration of dark fermentation process into a biorefinery concept to enhance the energetic gains, thereby improving the competitiveness of this process. The volatile fatty acids (VFAs) from dark fermentative H2-producing processes serve as precursors for the microbial synthesis of a broad spectrum of biotechnologically-important products such as biofuels and biocommodities. These products are desirable substrates for secondary bioprocesses due to their biodegradable nature and affordability. This short review discusses the use of acidogenic-derived VFAs in the production of value-added compounds such as polyhydroxyalkanoates (PHAs) alongside the microbial-based fuels (hydrogen, biogas, and electricity), and other valuable compounds (succinic acid, citric acid, and butanol). The review also highlights the strategies that have been used to enhance the extraction of VFAs from acidogenic effluents and other related waste streams. The application of novel enhancement techniques such as nanoparticles during VFAs recovery is also discussed in this work. Furthermore, the work highlights some of the recent advances in dark fermentation-based biorefinery, particularly the development of pilot-scale processes. Finally, the review provides some suggestions on the advancement of dark fermentation-based biorefineries using VFAs that are derived from acidogenic processes.

AB - In recent years, much attention has been directed towards the integration of dark fermentation process into a biorefinery concept to enhance the energetic gains, thereby improving the competitiveness of this process. The volatile fatty acids (VFAs) from dark fermentative H2-producing processes serve as precursors for the microbial synthesis of a broad spectrum of biotechnologically-important products such as biofuels and biocommodities. These products are desirable substrates for secondary bioprocesses due to their biodegradable nature and affordability. This short review discusses the use of acidogenic-derived VFAs in the production of value-added compounds such as polyhydroxyalkanoates (PHAs) alongside the microbial-based fuels (hydrogen, biogas, and electricity), and other valuable compounds (succinic acid, citric acid, and butanol). The review also highlights the strategies that have been used to enhance the extraction of VFAs from acidogenic effluents and other related waste streams. The application of novel enhancement techniques such as nanoparticles during VFAs recovery is also discussed in this work. Furthermore, the work highlights some of the recent advances in dark fermentation-based biorefinery, particularly the development of pilot-scale processes. Finally, the review provides some suggestions on the advancement of dark fermentation-based biorefineries using VFAs that are derived from acidogenic processes.

KW - Acidogenic-derived VFAs

KW - Biocommodities

KW - Biofuels

KW - Dark fermentation

UR - http://www.scopus.com/inward/record.url?scp=85102991222&partnerID=8YFLogxK

U2 - 10.1016/j.rser.2021.110971

DO - 10.1016/j.rser.2021.110971

M3 - 文献综述

AN - SCOPUS:85102991222

SN - 1364-0321

VL - 143

JO - Renewable and Sustainable Energy Reviews

JF - Renewable and Sustainable Energy Reviews

M1 - 110971

ER -