Journal
SUSTAINABLE ENERGY & FUELS
Volume 4, Issue 8, Pages 4238-4248Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0se00770f
Keywords
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Funding
- Austrian Climate and Energy Fund within the MELOS project [861392]
- Austrian Science Foundation (FWF) [Z222-N19]
- K1-MET GmbH
- metallurgical competence centre
- COMET (Competence Centre for Excellent Technologies)
- Austrian program for competence centres
- Federal Ministry for Transport, Innovation, and Technology
- Federal Ministry for Digital and Economic Affairs
- province of Upper Austria
- province of Tyrol
- province of Styria
- Styrian Business Promotion Agency (SFG)
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Microbial electrolysis cells (MECs) consisting of a bioanode and biocathode offer a promising solution for wastewater treatment. These systems can degrade organic substances at the bioanode while converting carbon dioxide (CO2), a major greenhouse gas, to a value-added fuel, methane (CH4) at the biocathode. The bioelectrodes were inoculated with a mixed culture under anaerobic conditions. By applying a constant potential of 0.40 Vvs.Ag/AgCl (3 M NaCl), the long-term performance of MECs has been studied by monitoring the removal of chemical oxygen demand (COD) in the anolyte which contained synthetic wastewater and CH4generation in the cathode chamber. To investigate the effect of electrode modification, poly(neutral red) and chitosan modified carbon felt electrodes were prepared, and applied in MECs. The results revealed that MECs with modified electrodes showed remarkably enhanced overall performance. The average COD removal efficiency, faradaic efficiency towards CO2reduction to CH4and CH4production yield of modified MECs were up to 67%, 55% and 0.14 LCH4/gCOD, respectively.
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