Energy Efficiency and Productivity Enhancement of Microbial Electrosynthesis of Acetate

Frontiers in Microbiology
Edward V LaBelle, Harold D May

Abstract

It was hypothesized that a lack of acetogenic biomass (biocatalyst) at the cathode of a microbial electrosynthesis system, due to electron and nutrient limitations, has prevented further improvement in acetate productivity and efficiency. In order to increase the biomass at the cathode and thereby performance, a bioelectrochemical system with this acetogenic community was operated under galvanostatic control and continuous media flow through a reticulated vitreous carbon (RVC) foam cathode. The combination of galvanostatic control and the high surface area cathode reduced the electron limitation and the continuous flow overcame the nutrient limitation while avoiding the accumulation of products and potential inhibitors. These conditions were set with the intention of operating the biocathode through the production of H2. Biofilm growth occurred on and within the unmodified RVC foam regardless of vigorous H2 generation on the cathode surface. A maximum volumetric rate or space time yield for acetate production of 0.78 g/Lcatholyte/h was achieved with 8 A/Lcatholyte (83.3 A/m(2)projected surface area of cathode) supplied to the continuous flow/culture bioelectrochemical reactors. The total Coulombic efficiency in H2 and acetate r...Continue Reading

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Citations

Jul 3, 2019·Microbial Biotechnology·Sarah M Glaven
Mar 30, 2019·Journal of Industrial Microbiology & Biotechnology·Rengasamy KarthikeyanArpita Bose
Dec 7, 2020·Trends in Biotechnology·Ludovic Jourdin, Thomas Burdyny
Mar 9, 2019·Current Opinion in Biotechnology·Lin Su, Caroline M Ajo-Franklin
Mar 28, 2018·Metabolic Engineering·Yohei TashiroAkihiko Kondo
Dec 2, 2020·Bioresource Technology·Laura Rovira-AlsinaSebastià Puig
Jun 22, 2021·Frontiers in Microbiology·Oriol Cabau-PeinadoLudovic Jourdin
Dec 7, 2019·Accounts of Chemical Research·Edward V LaBelleHarold D May
Nov 6, 2018·Biochemistry·Jake N GonzalesShota Atsumi
Oct 15, 2020·Chemical Reviews·Hui ChenShelley D Minteer

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Methods Mentioned

BETA
optical microscopy

Software Mentioned

STY
EC Lab

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