Transition roadmap for thermophilic carbon dioxide microbial electrosynthesis: Testing with real exhaust gases and operational control for a scalable design

Autor: Laura Rovira Alsina, M. Dolors Balaguer, Sebastià Puig
Přispěvatelé: European Commission, Agencia Estatal de Investigación
Rok vydání: 2022
Předmět:
Zdroj: Bioresource Technology, 2022, vol. 365, art.núm.128161
Articles publicats (D-EQATA)
DUGiDocs – Universitat de Girona
instname
ISSN: 1873-2976
2021-0078
Popis: Human activities release more carbon dioxide (CO2) into the atmosphere than the natural process can remove. This study attempts to address the main challenges for the thermophilic (50 °C) bioelectrochemical conversion of CO2 into acetate. First, real gaseous emissions were tested with mixed microbial consortia, which had no substantial influence on production rates (difference of 2.5%). Subsequently, a bench-scale system (TRL 4–5) was designed and launched to control key operational variables. Fixing the current at 1.3 A m−2, CO2 was reduced at a rate of 2.21 kg CO2 kg−1 acetate, while the electricity consumption was 2.07 kWh kg−1, the most efficient value so far. The results suggest that the operation with real effluents is feasible and the proposed design is energy efficient, but the right balance between maximising current densities without compromising the biocompatibility with catalysts will determine the transition from laboratory scale towards its implementation in the market This work was supported by the European Union’s Horizon 2020 research and innovation program under the grant agreement No 760431 (BioRECO2VER) and the Spanish Ministry of Science and Innovation (PLEC2021-007802 and PID2021-126240OB-I00). LEQUIA (http://www. lequia.udg.edu/) has been recognized as a consolidated research group by the Catalan Government (2017-SGR-1552). L.R.-A. acknowledge the support by the Catalan Government (2018 FI-B 00347) in the European FSE program (CCI 2014ES05SFOP007). S.P is a Serra Hunter Fellow (UdG-AG-575) and acknowledges the funding from the ICREA Academia award
Databáze: OpenAIRE
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