Predictability and robustness of anode biofilm to changing potential in microbial electrolysis system

Knoll, Melanie T.; Jürgensen, Nikolai; Weiler, Janek R.; Gescher, Johannes

doi:10.1016/j.biteb.2023.101640

Bioresource Technology Reports

2023

DOI: 10.1016/j.biteb.2023.101640

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Predictability and robustness of anode biofilm to changing potential in microbial electrolysis system

Melanie T. Knoll,

Nikolai Jürgensen,

Janek R. Weiler

et al.

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Cited by 2 publications

References 27 publications

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Strategic improvement of Shewanella oneidensis for biocatalysis: Approach to media refinement and scalable application in a microbial electrochemical system

Juergensen,

Weiler,

Knoll

et al. 2025

New Biotechnology

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Strategic improvement of Shewanella oneidensis for biocatalysis: Approach to media refinement and scalable application in a microbial electrochemical system

Juergensen,

Weiler,

Knoll

et al. 2025

New Biotechnology

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Strain and model development for auto- and heterotrophic 2,3-butanediol production using Cupriavidus necator H16

Weiler,

Jürgensen,

Cornejo Infante

et al. 2024

Biotechnol Biofuels

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The production of platform chemicals from renewable energy sources is a crucial step towards a post-fossil economy. This study reports on the production of acetoin and 2,3-butanediol heterotrophically with fructose as substrate and autotrophically from CO2 as carbon source, H2 as electron donor and O2 as electron acceptor with Cupriavidus necator. In a previous study, the strain was developed for the production of acetoin with high carbon efficiency. Acetoin can serve as a precursor for the synthesis of 2,3-butanediol by the integration of a butanediol dehydrogenase. In this study, different plasmid backbones and butanediol dehydrogenases were evaluated regarding efficiency for CO2-based 2,3-butanediol production. The developed strain utilizes the pBBR1 plasmid bearing a 2,3-butanediol dehydrogenase from Enterobacter cloacae and is characterized by 2,3-butanediol as the main product and a heterotrophic total product yield of 88.11%, an autotrophic volumetric productivity of 39.45 mg L−1 h−1, a total product carbon yield of 81.6%, an H2 efficiency of 33.46%, and a specific productivity of 0.016 g product per gram of biomass per hour. In addition, a mathematical model was developed to simulate the processes under these conditions. With this model, it was possible to calculate productivities and substrate usage at distinct time points of the production processes and calculate productivities and substrate usage with high resolution which will be useful in future applications.

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Predictability and robustness of anode biofilm to changing potential in microbial electrolysis system

Cited by 2 publications

References 27 publications

Strategic improvement of Shewanella oneidensis for biocatalysis: Approach to media refinement and scalable application in a microbial electrochemical system

Strategic improvement of Shewanella oneidensis for biocatalysis: Approach to media refinement and scalable application in a microbial electrochemical system

Strain and model development for auto- and heterotrophic 2,3-butanediol production using Cupriavidus necator H16

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